System.Security.Cryptography Namespace Reference

Classes
class	Aes
	Represents the abstract base class from which all implementations of the Advanced Encryption Standard (AES) must inherit. More...
class	AesCng
	Provides a Cryptography Next Generation (CNG) implementation of the Advanced Encryption Standard (AES) algorithm. More...
class	AesCryptoServiceProvider
	Performs symmetric encryption and decryption using the Cryptographic Application Programming Interfaces (CAPI) implementation of the Advanced Encryption Standard (AES) algorithm. More...
class	AesManaged
	Provides a managed implementation of the Advanced Encryption Standard (AES) symmetric algorithm. More...
class	AsnEncodedData
	Represents Abstract Syntax Notation One (ASN.1)-encoded data. More...
class	AsnEncodedDataCollection
	Represents a collection of T:System.Security.Cryptography.AsnEncodedData objects. This class cannot be inherited. More...
class	AsnEncodedDataEnumerator
	Provides the ability to navigate through an T:System.Security.Cryptography.AsnEncodedDataCollection object. This class cannot be inherited. More...
class	AsymmetricAlgorithm
	Represents the abstract base class from which all implementations of asymmetric algorithms must inherit. More...
class	AsymmetricKeyExchangeDeformatter
	Represents the base class from which all asymmetric key exchange deformatters derive. More...
class	AsymmetricKeyExchangeFormatter
	Represents the base class from which all asymmetric key exchange formatters derive. More...
class	AsymmetricSignatureDeformatter
	Represents the abstract base class from which all implementations of asymmetric signature deformatters derive. More...
class	AsymmetricSignatureFormatter
	Represents the base class from which all implementations of asymmetric signature formatters derive. More...
class	CngAlgorithm
	Encapsulates the name of an encryption algorithm. More...
class	CngAlgorithmGroup
	Encapsulates the name of an encryption algorithm group. More...
class	CngKey
	Defines the core functionality for keys that are used with Cryptography Next Generation (CNG) objects. More...
class	CngKeyBlobFormat
	Specifies a key BLOB format for use with Microsoft Cryptography Next Generation (CNG) objects. More...
class	CngKeyCreationParameters
	Contains advanced properties for key creation. More...
struct	CngProperty
	Encapsulates a property of a Cryptography Next Generation (CNG) key or provider. More...
class	CngPropertyCollection
	Provides a strongly typed collection of Cryptography Next Generation (CNG) properties. More...
class	CngProvider
	Encapsulates the name of a key storage provider (KSP) for use with Cryptography Next Generation (CNG) objects. More...
class	CngUIPolicy
	Encapsulates optional configuration parameters for the user interface (UI) that Cryptography Next Generation (CNG) displays when you access a protected key. More...
class	CryptoAPITransform
	Performs a cryptographic transformation of data. This class cannot be inherited. More...
class	CryptoConfig
	Accesses the cryptography configuration information. More...
class	CryptographicException
	The exception that is thrown when an error occurs during a cryptographic operation. More...
class	CryptographicUnexpectedOperationException
	The exception that is thrown when an unexpected operation occurs during a cryptographic operation. More...
class	CryptoStream
	Defines a stream that links data streams to cryptographic transformations. More...
class	CspKeyContainerInfo
	Provides additional information about a cryptographic key pair. This class cannot be inherited. More...
class	CspParameters
	Contains parameters that are passed to the cryptographic service provider (CSP) that performs cryptographic computations. This class cannot be inherited. More...
class	DeriveBytes
	Represents the abstract base class from which all classes that derive byte sequences of a specified length inherit. More...
class	DES
	Represents the base class for the Data Encryption Standard (DES) algorithm from which all T:System.Security.Cryptography.DES implementations must derive. More...
class	DESCryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) version of the Data Encryption Standard (T:System.Security.Cryptography.DES) algorithm. This class cannot be inherited. More...
class	DSA
	Represents the abstract base class from which all implementations of the Digital Signature Algorithm (T:System.Security.Cryptography.DSA) must inherit. More...
class	DSACng
	Provides a Cryptography Next Generation (CNG) implementation of the Digital Signature Algorithm (DSA). More...
class	DSACryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) implementation of the T:System.Security.Cryptography.DSA algorithm. This class cannot be inherited. More...
struct	DSAParameters
	Contains the typical parameters for the T:System.Security.Cryptography.DSA algorithm. More...
class	DSASignatureDeformatter
	Verifies a Digital Signature Algorithm (T:System.Security.Cryptography.DSA) PKCS#1 v1.5 signature. More...
class	DSASignatureFormatter
	Creates a Digital Signature Algorithm (T:System.Security.Cryptography.DSA) signature. More...
struct	ECCurve
	Represents an elliptic curve. More...
class	ECDiffieHellman
	Provides an abstract base class that Elliptic Curve Diffie-Hellman (ECDH) algorithm implementations can derive from. This class provides the basic set of operations that all ECDH implementations must support. More...
class	ECDiffieHellmanCng
	Provides a Cryptography Next Generation (CNG) implementation of the Elliptic Curve Diffie-Hellman (ECDH) algorithm. This class is used to perform cryptographic operations. More...
class	ECDiffieHellmanCngPublicKey
	Specifies an Elliptic Curve Diffie-Hellman (ECDH) public key for use with the T:System.Security.Cryptography.ECDiffieHellmanCng class. More...
class	ECDiffieHellmanPublicKey
	Provides an abstract base class from which all T:System.Security.Cryptography.ECDiffieHellmanCngPublicKey implementations must inherit. More...
class	ECDsa
	Provides an abstract base class that encapsulates the Elliptic Curve Digital Signature Algorithm (ECDSA). More...
class	ECDsaCng
	Provides a Cryptography Next Generation (CNG) implementation of the Elliptic Curve Digital Signature Algorithm (ECDSA). More...
struct	ECParameters
	Represents the standard parameters for the elliptic curve cryptography (ECC) algorithm. More...
struct	ECPoint
	Represents a (X,Y) coordinate pair for elliptic curve cryptography (ECC) structures. More...
class	FromBase64Transform
	Converts a T:System.Security.Cryptography.CryptoStream from base 64. More...
class	HashAlgorithm
	Represents the base class from which all implementations of cryptographic hash algorithms must derive. More...
struct	HashAlgorithmName
	Specifies the name of a cryptographic hash algorithm. More...
class	HMAC
	Represents the abstract class from which all implementations of Hash-based Message Authentication Code (HMAC) must derive. More...
class	HMACMD5
	Computes a Hash-based Message Authentication Code (HMAC) by using the T:System.Security.Cryptography.MD5 hash function. More...
class	HMACRIPEMD160
	Computes a Hash-based Message Authentication Code (HMAC) by using the T:System.Security.Cryptography.RIPEMD160 hash function. More...
class	HMACSHA1
	Computes a Hash-based Message Authentication Code (HMAC) using the T:System.Security.Cryptography.SHA1 hash function. More...
class	HMACSHA256
	Computes a Hash-based Message Authentication Code (HMAC) by using the T:System.Security.Cryptography.SHA256 hash function. More...
class	HMACSHA384
	Computes a Hash-based Message Authentication Code (HMAC) using the T:System.Security.Cryptography.SHA384 hash function. More...
class	HMACSHA512
	Computes a Hash-based Message Authentication Code (HMAC) using the T:System.Security.Cryptography.SHA512 hash function. More...
interface	ICryptoTransform
	Defines the basic operations of cryptographic transformations. More...
interface	ICspAsymmetricAlgorithm
	Defines methods that allow an T:System.Security.Cryptography.AsymmetricAlgorithm class to enumerate key container information, and import and export Microsoft Cryptographic API (CAPI)–compatible key blobs. More...
class	IncrementalHash
	Provides support for computing a hash or Hash-based Message Authentication Code (HMAC) value incrementally across several segments. More...
class	KeyedHashAlgorithm
	Represents the abstract class from which all implementations of keyed hash algorithms must derive. More...
class	KeySizes
	Determines the set of valid key sizes for the symmetric cryptographic algorithms. More...
class	MACTripleDES
	Computes a Message Authentication Code (MAC) using T:System.Security.Cryptography.TripleDES for the input data T:System.Security.Cryptography.CryptoStream. More...
class	ManifestSignatureInformation
	Provides information for a manifest signature. More...
class	ManifestSignatureInformationCollection
	Represents a read-only collection of T:System.Security.Cryptography.ManifestSignatureInformation objects.  More...
class	MaskGenerationMethod
	Represents the abstract class from which all mask generator algorithms must derive. More...
class	MD5
	Represents the abstract class from which all implementations of the T:System.Security.Cryptography.MD5 hash algorithm inherit. More...
class	MD5Cng
	Provides a CNG (Cryptography Next Generation) implementation of the MD5 (Message Digest 5) 128-bit hashing algorithm. More...
class	MD5CryptoServiceProvider
	Computes the T:System.Security.Cryptography.MD5 hash value for the input data using the implementation provided by the cryptographic service provider (CSP). This class cannot be inherited. More...
class	Oid
	Represents a cryptographic object identifier. This class cannot be inherited. More...
class	OidCollection
	Represents a collection of T:System.Security.Cryptography.Oid objects. This class cannot be inherited. More...
class	OidEnumerator
	Provides the ability to navigate through an T:System.Security.Cryptography.OidCollection object. This class cannot be inherited. More...
class	PasswordDeriveBytes
	Derives a key from a password using an extension of the PBKDF1 algorithm. More...
class	PKCS1MaskGenerationMethod
	Computes masks according to PKCS #1 for use by key exchange algorithms. More...
class	RandomNumberGenerator
	Represents the abstract class from which all implementations of cryptographic random number generators derive. More...
class	RC2
	Represents the base class from which all implementations of the T:System.Security.Cryptography.RC2 algorithm must derive. More...
class	RC2CryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) implementation of the T:System.Security.Cryptography.RC2 algorithm. This class cannot be inherited. More...
class	Rfc2898DeriveBytes
	Implements password-based key derivation functionality, PBKDF2, by using a pseudo-random number generator based on T:System.Security.Cryptography.HMACSHA1. More...
class	Rijndael
	Represents the base class from which all implementations of the T:System.Security.Cryptography.Rijndael symmetric encryption algorithm must inherit. More...
class	RijndaelManaged
	Accesses the managed version of the T:System.Security.Cryptography.Rijndael algorithm. This class cannot be inherited. More...
class	RijndaelManagedTransform
	Performs a cryptographic transformation of data using the Rijndael algorithm. This class cannot be inherited. More...
class	RIPEMD160
	Represents the abstract class from which all implementations of the MD160 hash algorithm inherit. More...
class	RIPEMD160Managed
	Computes the T:System.Security.Cryptography.RIPEMD160 hash for the input data using the managed library. More...
class	RNGCryptoServiceProvider
	Implements a cryptographic Random Number Generator (RNG) using the implementation provided by the cryptographic service provider (CSP). This class cannot be inherited. More...
class	RSA
	Represents the base class from which all implementations of the T:System.Security.Cryptography.RSA algorithm inherit. More...
class	RSACng
	Provides a Cryptography Next Generation (CNG) implementation of the RSA algorithm. More...
class	RSACryptoServiceProvider
	Performs asymmetric encryption and decryption using the implementation of the T:System.Security.Cryptography.RSA algorithm provided by the cryptographic service provider (CSP). This class cannot be inherited. More...
class	RSAEncryptionPadding
	Specifies the padding mode and parameters to use with RSA encryption or decryption operations. More...
class	RSAOAEPKeyExchangeDeformatter
	Decrypts Optimal Asymmetric Encryption Padding (OAEP) key exchange data. More...
class	RSAOAEPKeyExchangeFormatter
	Creates Optimal Asymmetric Encryption Padding (OAEP) key exchange data using T:System.Security.Cryptography.RSA. More...
struct	RSAParameters
	Represents the standard parameters for the T:System.Security.Cryptography.RSA algorithm. More...
class	RSAPKCS1KeyExchangeDeformatter
	Decrypts the PKCS #1 key exchange data. More...
class	RSAPKCS1KeyExchangeFormatter
	Creates the PKCS#1 key exchange data using T:System.Security.Cryptography.RSA. More...
class	RSAPKCS1SignatureDeformatter
	Verifies an T:System.Security.Cryptography.RSA PKCS #1 version 1.5 signature. More...
class	RSAPKCS1SignatureFormatter
	Creates an T:System.Security.Cryptography.RSA PKCS #1 version 1.5 signature. More...
class	RSASignaturePadding
	Specifies the padding mode and parameters to use with RSA signature creation or verification operations. More...
class	SHA1
	Computes the T:System.Security.Cryptography.SHA1 hash for the input data. More...
class	SHA1Cng
	Provides a Cryptography Next Generation (CNG) implementation of the Secure Hash Algorithm (SHA). More...
class	SHA1CryptoServiceProvider
	Computes the T:System.Security.Cryptography.SHA1 hash value for the input data using the implementation provided by the cryptographic service provider (CSP). This class cannot be inherited. More...
class	SHA1Managed
	Computes the T:System.Security.Cryptography.SHA1 hash for the input data using the managed library. More...
class	SHA256
	Computes the T:System.Security.Cryptography.SHA256 hash for the input data. More...
class	SHA256Cng
	Provides a Cryptography Next Generation (CNG) implementation of the Secure Hash Algorithm (SHA) for 256-bit hash values. More...
class	SHA256CryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) implementation of the T:System.Security.Cryptography.SHA256 algorithm. More...
class	SHA256Managed
	Computes the T:System.Security.Cryptography.SHA256 hash for the input data using the managed library. More...
class	SHA384
	Computes the T:System.Security.Cryptography.SHA384 hash for the input data. More...
class	SHA384Cng
	Provides a Cryptography Next Generation (CNG) implementation of the Secure Hash Algorithm (SHA) for 384-bit hash values. More...
class	SHA384CryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) implementation of the T:System.Security.Cryptography.SHA384 algorithm. More...
class	SHA384Managed
	Computes the T:System.Security.Cryptography.SHA384 hash for the input data using the managed library. More...
class	SHA512
	Computes the T:System.Security.Cryptography.SHA512 hash for the input data. More...
class	SHA512Cng
	Provides a Cryptography Next Generation (CNG) implementation of the Secure Hash Algorithm (SHA) for 512-bit hash values. More...
class	SHA512CryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) implementation of the T:System.Security.Cryptography.SHA512 algorithm. More...
class	SHA512Managed
	Computes the T:System.Security.Cryptography.SHA512 hash algorithm for the input data using the managed library. More...
class	SignatureDescription
	Contains information about the properties of a digital signature. More...
class	StrongNameSignatureInformation
	Holds the strong name signature information for a manifest. More...
class	SymmetricAlgorithm
	Represents the abstract base class from which all implementations of symmetric algorithms must inherit. More...
class	ToBase64Transform
	Converts a T:System.Security.Cryptography.CryptoStream to base 64. More...
class	TripleDES
	Represents the base class for Triple Data Encryption Standard algorithms from which all T:System.Security.Cryptography.TripleDES implementations must derive. More...
class	TripleDESCng
	Provides a Cryptography Next Generation (CNG) implementation of the Triple Data Encryption Standard (3DES) algorithm. More...
class	TripleDESCryptoServiceProvider
	Defines a wrapper object to access the cryptographic service provider (CSP) version of the T:System.Security.Cryptography.TripleDES algorithm. This class cannot be inherited. More...

Enumerations
enum	AsymmetricPaddingMode { None = 1, Pkcs1 = 2, Oaep = 4, Pss = 8 }
enum	CipherMode {   CipherMode.CBC = 1, CipherMode.ECB, CipherMode.OFB, CipherMode.CFB,   CipherMode.CTS }
	Specifies the block cipher mode to use for encryption. More...
enum	CngExportPolicies {   CngExportPolicies.None = 0x0, CngExportPolicies.AllowExport = 0x1, CngExportPolicies.AllowPlaintextExport = 0x2, CngExportPolicies.AllowArchiving = 0x4,   CngExportPolicies.AllowPlaintextArchiving = 0x8 }
	Specifies the key export policies for a key. More...
enum	CngKeyCreationOptions { CngKeyCreationOptions.None = 0x0, CngKeyCreationOptions.MachineKey = 0x20, CngKeyCreationOptions.OverwriteExistingKey = 0x80 }
	Specifies options used for key creation. More...
enum	CngKeyHandleOpenOptions { CngKeyHandleOpenOptions.None = 0x0, CngKeyHandleOpenOptions.EphemeralKey = 0x1 }
	Specifies options for opening key handles. More...
enum	CngKeyOpenOptions { CngKeyOpenOptions.None = 0x0, CngKeyOpenOptions.UserKey = 0x0, CngKeyOpenOptions.MachineKey = 0x20, CngKeyOpenOptions.Silent = 0x40 }
	Specifies options for opening a key. More...
enum	CngKeyTypes { None = 0x0, MachineKey = 0x20 }
enum	CngKeyUsages {   CngKeyUsages.None = 0x0, CngKeyUsages.Decryption = 0x1, CngKeyUsages.Signing = 0x2, CngKeyUsages.KeyAgreement = 0x4,   CngKeyUsages.AllUsages = 0xFFFFFF }
	Specifies the cryptographic operations that a Cryptography Next Generation (CNG) key may be used with. More...
enum	CngPropertyOptions { CngPropertyOptions.None = 0x0, CngPropertyOptions.CustomProperty = 0x40000000, CngPropertyOptions.Persist = int.MinValue }
	Specifies Cryptography Next Generation (CNG) key property options. More...
enum	CngUIProtectionLevels { CngUIProtectionLevels.None = 0x0, CngUIProtectionLevels.ProtectKey = 0x1, CngUIProtectionLevels.ForceHighProtection = 0x2 }
	Specifies the protection level for the key in user interface (UI) prompting scenarios. More...
enum	CryptoAPITransformMode { Encrypt, Decrypt }
enum	CryptoStreamMode { CryptoStreamMode.Read, CryptoStreamMode.Write }
	Specifies the mode of a cryptographic stream. More...
enum	CspAlgorithmType { Rsa, Dss }
enum	CspProviderFlags {   CspProviderFlags.NoFlags = 0x0, CspProviderFlags.UseMachineKeyStore = 0x1, CspProviderFlags.UseDefaultKeyContainer = 0x2, CspProviderFlags.UseNonExportableKey = 0x4,   CspProviderFlags.UseExistingKey = 0x8, CspProviderFlags.UseArchivableKey = 0x10, CspProviderFlags.UseUserProtectedKey = 0x20, CspProviderFlags.NoPrompt = 0x40,   CspProviderFlags.CreateEphemeralKey = 0x80 }
	Specifies flags that modify the behavior of the cryptographic service providers (CSP). More...
enum	DSAFIPSVERSION_ENUM { DSA_FIPS186_2, DSA_FIPS186_3 }
enum	ECDiffieHellmanKeyDerivationFunction { ECDiffieHellmanKeyDerivationFunction.Hash, ECDiffieHellmanKeyDerivationFunction.Hmac, ECDiffieHellmanKeyDerivationFunction.Tls }
	Specifies the key derivation function that the T:System.Security.Cryptography.ECDiffieHellmanCng class will use to convert secret agreements into key material. More...
enum	ECKeyXmlFormat { ECKeyXmlFormat.Rfc4050 }
	Defines XML serialization formats for elliptic curve keys. More...
enum	EncryptionMode { Encrypt, Decrypt }
enum	FromBase64TransformMode { FromBase64TransformMode.IgnoreWhiteSpaces, FromBase64TransformMode.DoNotIgnoreWhiteSpaces }
	Specifies whether white space should be ignored in the base 64 transformation. More...
enum	HASHALGORITHM_ENUM { DSA_HASH_ALGORITHM_SHA1, DSA_HASH_ALGORITHM_SHA256, DSA_HASH_ALGORITHM_SHA512 }
enum	KeyNumber { KeyNumber.Exchange = 1, KeyNumber.Signature }
	Specifies whether to create an asymmetric signature key or an asymmetric exchange key. More...
enum	OidGroup {   OidGroup.All, OidGroup.HashAlgorithm, OidGroup.EncryptionAlgorithm, OidGroup.PublicKeyAlgorithm,   OidGroup.SignatureAlgorithm, OidGroup.Attribute, OidGroup.ExtensionOrAttribute, OidGroup.EnhancedKeyUsage,   OidGroup.Policy, OidGroup.Template, OidGroup.KeyDerivationFunction }
	Identifies Windows cryptographic object identifier (OID) groups. More...
enum	PaddingMode {   PaddingMode.None = 1, PaddingMode.PKCS7, PaddingMode.Zeros, PaddingMode.ANSIX923,   PaddingMode.ISO10126 }
	Specifies the type of padding to apply when the message data block is shorter than the full number of bytes needed for a cryptographic operation. More...
enum	RijndaelManagedTransformMode { Encrypt, Decrypt }
enum	RSAEncryptionPaddingMode { RSAEncryptionPaddingMode.Pkcs1, RSAEncryptionPaddingMode.Oaep }
	Specifies the padding mode to use with RSA encryption or decryption operations. More...
enum	RSASignaturePaddingMode { RSASignaturePaddingMode.Pkcs1, RSASignaturePaddingMode.Pss }
	Specifies the padding mode to use with RSA signature creation or verification operations. More...
enum	SignatureVerificationResult {   SignatureVerificationResult.Valid = 0, SignatureVerificationResult.AssemblyIdentityMismatch = 1, SignatureVerificationResult.ContainingSignatureInvalid = 2, SignatureVerificationResult.PublicKeyTokenMismatch = 3,   SignatureVerificationResult.PublisherMismatch = 4, SignatureVerificationResult.SystemError = -2146869247, SignatureVerificationResult.InvalidSignerCertificate = -2146869246, SignatureVerificationResult.InvalidCountersignature = -2146869245,   SignatureVerificationResult.InvalidCertificateSignature = -2146869244, SignatureVerificationResult.InvalidTimestamp = -2146869243, SignatureVerificationResult.BadDigest = -2146869232, SignatureVerificationResult.BasicConstraintsNotObserved = -2146869223,   SignatureVerificationResult.UnknownTrustProvider = -2146762751, SignatureVerificationResult.UnknownVerificationAction = -2146762750, SignatureVerificationResult.BadSignatureFormat = -2146762749, SignatureVerificationResult.CertificateNotExplicitlyTrusted = -2146762748,   SignatureVerificationResult.MissingSignature = -2146762496, SignatureVerificationResult.CertificateExpired = -2146762495, SignatureVerificationResult.InvalidTimePeriodNesting = -2146762494, SignatureVerificationResult.InvalidCertificateRole = -2146762493,   SignatureVerificationResult.PathLengthConstraintViolated = -2146762492, SignatureVerificationResult.UnknownCriticalExtension = -2146762491, SignatureVerificationResult.CertificateUsageNotAllowed = -2146762490, SignatureVerificationResult.IssuerChainingError = -2146762489,   SignatureVerificationResult.CertificateMalformed = -2146762488, SignatureVerificationResult.UntrustedRootCertificate = -2146762487, SignatureVerificationResult.CouldNotBuildChain = -2146762486, SignatureVerificationResult.GenericTrustFailure = -2146762485,   SignatureVerificationResult.CertificateRevoked = -2146762484, SignatureVerificationResult.UntrustedTestRootCertificate = -2146762483, SignatureVerificationResult.RevocationCheckFailure = -2146762482, SignatureVerificationResult.InvalidCertificateUsage = -2146762480,   SignatureVerificationResult.CertificateExplicitlyDistrusted = -2146762479, SignatureVerificationResult.UntrustedCertificationAuthority = -2146762478, SignatureVerificationResult.InvalidCertificatePolicy = -2146762477, SignatureVerificationResult.InvalidCertificateName = -2146762476 }
	Specifies most of the result codes for signature verification. More...

Enumeration Type Documentation

CipherMode

enum System.Security.Cryptography.CipherMode

strong

Specifies the block cipher mode to use for encryption.

Enumerator
CBC	The Cipher Block Chaining (CBC) mode introduces feedback. Before each plain text block is encrypted, it is combined with the cipher text of the previous block by a bitwise exclusive OR operation. This ensures that even if the plain text contains many identical blocks, they will each encrypt to a different cipher text block. The initialization vector is combined with the first plain text block by a bitwise exclusive OR operation before the block is encrypted. If a single bit of the cipher text block is mangled, the corresponding plain text block will also be mangled. In addition, a bit in the subsequent block, in the same position as the original mangled bit, will be mangled.
ECB	The Electronic Codebook (ECB) mode encrypts each block individually. Any blocks of plain text that are identical and in the same message, or that are in a different message encrypted with the same key, will be transformed into identical cipher text blocks. Important:  This mode is not recommended because it opens the door for multiple security exploits. If the plain text to be encrypted contains substantial repetition, it is feasible for the cipher text to be broken one block at a time. It is also possible to use block analysis to determine the encryption key. Also, an active adversary can substitute and exchange individual blocks without detection, which allows blocks to be saved and inserted into the stream at other points without detection.
OFB	The Output Feedback (OFB) mode processes small increments of plain text into cipher text instead of processing an entire block at a time. This mode is similar to CFB; the only difference between the two modes is the way that the shift register is filled. If a bit in the cipher text is mangled, the corresponding bit of plain text will be mangled. However, if there are extra or missing bits from the cipher text, the plain text will be mangled from that point on.
CFB	The Cipher Feedback (CFB) mode processes small increments of plain text into cipher text, instead of processing an entire block at a time. This mode uses a shift register that is one block in length and is divided into sections. For example, if the block size is 8 bytes, with one byte processed at a time, the shift register is divided into eight sections. If a bit in the cipher text is mangled, one plain text bit is mangled and the shift register is corrupted. This results in the next several plain text increments being mangled until the bad bit is shifted out of the shift register. The default feedback size can vary by algorithm, but is typically either 8 bits or the number of bits of the block size. You can alter the number of feedback bits by using the P:System.Security.Cryptography.SymmetricAlgorithm.FeedbackSize property. Algorithms that support CFB use this property to set the feedback.
CTS	The Cipher Text Stealing (CTS) mode handles any length of plain text and produces cipher text whose length matches the plain text length. This mode behaves like the CBC mode for all but the last two blocks of the plain text.

Definition at line 8 of file CipherMode.cs.

CngExportPolicies

enum System.Security.Cryptography.CngExportPolicies

strong

Specifies the key export policies for a key.

Enumerator
None	No export policies are established. Key export is allowed without restriction.
AllowExport	The private key can be exported multiple times.
AllowPlaintextExport	The private key can be exported multiple times as plaintext.
AllowArchiving	The private key can be exported one time for archiving purposes.
AllowPlaintextArchiving	The private key can be exported one time as plaintext.

Definition at line 5 of file CngExportPolicies.cs.

CngKeyCreationOptions

enum System.Security.Cryptography.CngKeyCreationOptions

strong

Specifies options used for key creation.

Enumerator
None	No key creation options are used.
MachineKey	A machine-wide key is created.
OverwriteExistingKey	The existing key is overwritten during key creation.

Definition at line 5 of file CngKeyCreationOptions.cs.

CngKeyHandleOpenOptions

enum System.Security.Cryptography.CngKeyHandleOpenOptions

strong

Specifies options for opening key handles.

Enumerator
None	The key handle being opened does not specify an ephemeral key.
EphemeralKey	The key handle being opened specifies an ephemeral key.

Definition at line 5 of file CngKeyHandleOpenOptions.cs.

CngKeyOpenOptions

enum System.Security.Cryptography.CngKeyOpenOptions

strong

Specifies options for opening a key.

Enumerator
None	No key open options are specified.
UserKey	If the F:System.Security.Cryptography.CngKeyOpenOptions.MachineKey value is not specified, a user key is opened instead.
MachineKey	A machine-wide key is opened.
Silent	UI prompting is suppressed.

Definition at line 5 of file CngKeyOpenOptions.cs.

CngKeyUsages

enum System.Security.Cryptography.CngKeyUsages

strong

Specifies the cryptographic operations that a Cryptography Next Generation (CNG) key may be used with.

Enumerator
None	No usage values are assigned to the key.
Decryption	The key can be used for encryption and decryption.
Signing	The key can be used for signing and verification.
KeyAgreement	The key can be used for secret agreement generation and key exchange.
AllUsages	The key can be used for all purposes.

Definition at line 5 of file CngKeyUsages.cs.

CngPropertyOptions

enum System.Security.Cryptography.CngPropertyOptions

strong

Specifies Cryptography Next Generation (CNG) key property options.

Enumerator
None	The referenced property has no options.
CustomProperty	The property is not specified by CNG. Use this option to avoid future name conflicts with CNG properties.
Persist	The property should be persisted.

Definition at line 5 of file CngPropertyOptions.cs.

CngUIProtectionLevels

enum System.Security.Cryptography.CngUIProtectionLevels

strong

Specifies the protection level for the key in user interface (UI) prompting scenarios.

Enumerator
None	No UI prompt is displayed when the key is accessed.
ProtectKey	A UI prompt is displayed the first time the key is accessed in a process.
ForceHighProtection	A UI prompt is displayed every time the key is accessed.

Definition at line 5 of file CngUIProtectionLevels.cs.

CryptoStreamMode

enum System.Security.Cryptography.CryptoStreamMode

strong

Specifies the mode of a cryptographic stream.

Enumerator
Read	Read access to a cryptographic stream.
Write	Write access to a cryptographic stream.

Definition at line 8 of file CryptoStreamMode.cs.

CspProviderFlags

enum System.Security.Cryptography.CspProviderFlags

strong

Specifies flags that modify the behavior of the cryptographic service providers (CSP).

Enumerator
NoFlags	Do not specify any settings.
UseMachineKeyStore	Use key information from the computer's key store.
UseDefaultKeyContainer	Use key information from the default key container.
UseNonExportableKey	Use key information that cannot be exported.
UseExistingKey	Use key information from the current key.
UseArchivableKey	Allow a key to be exported for archival or recovery.
UseUserProtectedKey	Notify the user through a dialog box or another method when certain actions are attempting to use a key. This flag is not compatible with the F:System.Security.Cryptography.CspProviderFlags.NoPrompt flag.
NoPrompt	Prevent the CSP from displaying any user interface (UI) for this context.
CreateEphemeralKey	Create a temporary key that is released when the associated Rivest-Shamir-Adleman (RSA) object is closed. Do not use this flag if you want your key to be independent of the RSA object.

Definition at line 9 of file CspProviderFlags.cs.

ECDiffieHellmanKeyDerivationFunction

enum System.Security.Cryptography.ECDiffieHellmanKeyDerivationFunction

strong

Specifies the key derivation function that the T:System.Security.Cryptography.ECDiffieHellmanCng class will use to convert secret agreements into key material.

Enumerator
Hash	A hash algorithm is used to generate key material. The P:System.Security.Cryptography.ECDiffieHellmanCng.HashAlgorithm property specifies the name of the algorithm to use. If the algorithm name is not specified, T:System.Security.Cryptography.SHA256 is used as the default algorithm.
Hmac	A Hash-based Message Authentication Code (HMAC) algorithm is used to generate key material. The P:System.Security.Cryptography.ECDiffieHellmanCng.HmacKey property specifies the key to use. Either this property must be set or the P:System.Security.Cryptography.ECDiffieHellmanCng.UseSecretAgreementAsHmacKey property must be set to true; otherwise, a T:System.Security.Cryptography.CryptographicException is thrown when you use F:System.Security.Cryptography.ECDiffieHellmanKeyDerivationFunction.Hmac. If both properties are set, the secret agreement is used as the HMAC key.
Tls	The Transport Layer Security (TLS) protocol is used to generate key material. The P:System.Security.Cryptography.ECDiffieHellmanCng.Seed and P:System.Security.Cryptography.ECDiffieHellmanCng.Label properties must be set; otherwise, a T:System.Security.Cryptography.CryptographicException is thrown when you use F:System.Security.Cryptography.ECDiffieHellmanKeyDerivationFunction.Tls.

Definition at line 4 of file ECDiffieHellmanKeyDerivationFunction.cs.

ECKeyXmlFormat

enum System.Security.Cryptography.ECKeyXmlFormat

strong

Defines XML serialization formats for elliptic curve keys.

Enumerator
Rfc4050	An XML serialization format described in RFC 4050, "Using the Elliptic Curve Signature Algorithm (ECDSA) for XML Digital Signatures."

Definition at line 4 of file ECKeyXmlFormat.cs.

FromBase64TransformMode

enum System.Security.Cryptography.FromBase64TransformMode

strong

Specifies whether white space should be ignored in the base 64 transformation.

Enumerator
IgnoreWhiteSpaces	White space should be ignored.
DoNotIgnoreWhiteSpaces	White space should not be ignored.

Definition at line 8 of file FromBase64TransformMode.cs.

KeyNumber

enum System.Security.Cryptography.KeyNumber

strong

Specifies whether to create an asymmetric signature key or an asymmetric exchange key.

Enumerator
Exchange	An exchange key pair used to encrypt session keys so that they can be safely stored and exchanged with other users.
Signature	A signature key pair used for authenticating digitally signed messages or files.

Definition at line 8 of file KeyNumber.cs.

OidGroup

enum System.Security.Cryptography.OidGroup

strong

Identifies Windows cryptographic object identifier (OID) groups.

Enumerator
All	All the groups.
HashAlgorithm	The Windows group that is represented by CRYPT_HASH_ALG_OID_GROUP_ID.
EncryptionAlgorithm	The Windows group that is represented by CRYPT_ENCRYPT_ALG_OID_GROUP_ID.
PublicKeyAlgorithm	The Windows group that is represented by CRYPT_PUBKEY_ALG_OID_GROUP_ID.
SignatureAlgorithm	The Windows group that is represented by CRYPT_SIGN_ALG_OID_GROUP_ID.
Attribute	The Windows group that is represented by CRYPT_RDN_ATTR_OID_GROUP_ID.
ExtensionOrAttribute	The Windows group that is represented by CRYPT_EXT_OR_ATTR_OID_GROUP_ID.
EnhancedKeyUsage	The Windows group that is represented by CRYPT_ENHKEY_USAGE_OID_GROUP_ID.
Policy	The Windows group that is represented by CRYPT_POLICY_OID_GROUP_ID.
Template	The Windows group that is represented by CRYPT_TEMPLATE_OID_GROUP_ID.
KeyDerivationFunction	The Windows group that is represented by CRYPT_KDF_OID_GROUP_ID.

Definition at line 4 of file OidGroup.cs.

PaddingMode

enum System.Security.Cryptography.PaddingMode

strong

Specifies the type of padding to apply when the message data block is shorter than the full number of bytes needed for a cryptographic operation.

Enumerator
None	No padding is done.
PKCS7	The PKCS #7 padding string consists of a sequence of bytes, each of which is equal to the total number of padding bytes added.
Zeros	The padding string consists of bytes set to zero.
ANSIX923	The ANSIX923 padding string consists of a sequence of bytes filled with zeros before the length.
ISO10126	The ISO10126 padding string consists of random data before the length.

Definition at line 8 of file PaddingMode.cs.

RSAEncryptionPaddingMode

enum System.Security.Cryptography.RSAEncryptionPaddingMode

strong

Specifies the padding mode to use with RSA encryption or decryption operations.

Enumerator
Pkcs1	PKCS #1 v1.5.
Oaep	Optimal Asymmetric Encryption Padding.

Definition at line 4 of file RSAEncryptionPaddingMode.cs.

RSASignaturePaddingMode

enum System.Security.Cryptography.RSASignaturePaddingMode

strong

Specifies the padding mode to use with RSA signature creation or verification operations.

Enumerator
Pkcs1	PKCS #1 v1.5
Pss	Probabilistic Signature Scheme

Definition at line 4 of file RSASignaturePaddingMode.cs.

SignatureVerificationResult

enum System.Security.Cryptography.SignatureVerificationResult

strong

Specifies most of the result codes for signature verification.

Enumerator
Valid	The certificate verification result is valid.
AssemblyIdentityMismatch	The identity of the assembly specified in the /asm:assembly/asm:assemblyIdentity node of the manifest does not match the identity of the assembly in the Authenticode signature in the /asm:assembly/ds:signature/ds:KeyInfo/msrel:RelData/r:license/r:grant/as:ManifestInformation/as:assemblyIdentity node.
ContainingSignatureInvalid	The strong name signature does not verify in the T:System.Security.Cryptography.X509Certificates.AuthenticodeSignatureInformation object. Because the strong name signature wraps the Authenticode signature, someone could replace the Authenticode signature with a signature of their choosing. To prevent this, this error code is returned if the strong name does not verify because substituting a part of the strong name signature will invalidate it.
PublicKeyTokenMismatch	The public key token from the manifest identity in the /asm:assembly/asm:AssemblyIdentity node does not match the public key token of the key that is used to sign the manifest.
PublisherMismatch	The publisher name from /asm:assembly/asmv2:publisherIdentity does not match the subject name of the signing certificate, or the issuer key hash from the same publisherIdentity node does not match the key hash of the signing certificate.
SystemError	A system-level error occurred while verifying trust.
InvalidSignerCertificate	The certificate for the signer of the message is invalid or not found.
InvalidCountersignature	One of the counter signatures is invalid.
InvalidCertificateSignature	The signature of the certificate cannot be verified.
InvalidTimestamp	The time stamp signature or certificate could not be verified or is malformed.
BadDigest	The digital signature of the object did not verify.
BasicConstraintsNotObserved	The basic constraint extension of a certificate has not been observed.
UnknownTrustProvider	The certificate has an unknown trust provider.
UnknownVerificationAction	The certificate has an unknown verification action.
BadSignatureFormat	The signature format is invalid.
CertificateNotExplicitlyTrusted	The certificate is not trusted explicitly.
MissingSignature	The signature is missing.
CertificateExpired	The certificate has expired.
InvalidTimePeriodNesting	A certificate was issued after the issuing certificate has expired.
InvalidCertificateRole	The certificate has an invalid role.
PathLengthConstraintViolated	A path length constraint in the certification chain has been violated.
UnknownCriticalExtension	A certificate contains an unknown extension that is marked critical.
CertificateUsageNotAllowed	The certificate cannot be used for signing and verification.
IssuerChainingError	A parent of a given certificate did not issue that child certificate.
CertificateMalformed	The certificate is missing or has an empty value for an important field, such as a subject or issuer name.
UntrustedRootCertificate	The root certificate is not trusted.
CouldNotBuildChain	The chain could not be built.
GenericTrustFailure	There is a general trust failure with the certificate.
CertificateRevoked	The certificate has been revoked.
UntrustedTestRootCertificate	The test root certificate is not trusted.
RevocationCheckFailure	The revocation check failed.
InvalidCertificateUsage	The certificate has an invalid usage.
CertificateExplicitlyDistrusted	The certificate was explicitly marked as not trusted by the user.
UntrustedCertificationAuthority	The certification chain processed correctly, but one of the CA certificates is not trusted by the policy provider.
InvalidCertificatePolicy	The certificate has an invalid policy.
InvalidCertificateName	The certificate has an invalid name. The name is either not included in the permitted list or is explicitly excluded.

Definition at line 4 of file SignatureVerificationResult.cs.