# AssemblyHashAlgorithm Enumeration

**.NET Framework (current version)**

Specifies all the hash algorithms used for hashing files and for generating the strong name.

**Namespace:**System.Configuration.Assemblies

**Assembly:**mscorlib (in mscorlib.dll)

Member name | Description | |
---|---|---|

MD5 | Retrieves the MD5 message-digest algorithm. MD5 was developed by Rivest in 1991. It is basically MD4 with safety-belts and while it is slightly slower than MD4, it helps provide more security. The algorithm consists of four distinct rounds, which has a slightly different design from that of MD4. Message-digest size, as well as padding requirements, remain the same. | |

None | A mask indicating that there is no hash algorithm. If you specify | |

SHA1 | A mask used to retrieve a revision of the Secure Hash Algorithm that corrects an unpublished flaw in SHA. | |

SHA256 | A mask used to retrieve a version of the Secure Hash Algorithm with a hash size of 256 bits. | |

SHA384 | A mask used to retrieve a version of the Secure Hash Algorithm with a hash size of 384 bits. | |

SHA512 | A mask used to retrieve a version of the Secure Hash Algorithm with a hash size of 512 bits. |

A *hash function**H* is a transformation that takes an input *m* and returns a fixed-size string, which is called the hash value *h* (that is, *h* = *H* (*m*)). Hash functions with just this property have a variety of general computational uses, but when employed in cryptography, the hash functions are usually chosen to have some additional properties.

The basic requirements for a cryptographic hash function are:

The input can be of any length.

The output has a fixed length.

*H*(*x)*is relatively easy to compute for any given x.*H*(*x*) is one-way.*H*(*x*) is collision-free.

The hash value represents concisely the longer message or document from which it was computed; this value is called the message digest. You can think of a message digest as a digital fingerprint of the larger document. Examples of well-known hash functions are MD2 and and SHA.

**.NET Framework**

Available since 1.1

**Silverlight**

Available since 2.0

**Windows Phone Silverlight**

Available since 7.0