View Source: CryptographicHash - Waikato Linux Users Group

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A CryptographicHash is a [Hash] for which it is ComputationallyInfeasible or at least VeryImpossible to construct a message that results in a particular pre-specified key, or to construct two messages which result in the same key. This makes such hash functions useful for assuring the integrity of documents. By encrypting the hash with a PublicKey it can also serve for signing documents such that anyone with the corresponding PublicKey can verify their integrity. Other common uses include:

* HashTable~s
* PasswordEncryption
* Making long strings shorter

Several well known and understood algorithms fall in this category:

* MD2 (RFC:1319) – slow
* MD4 (RFC:1320)
* [MD5] (RFC:1321)
* [SHA1]

A [competition is currently in progress|http://www.schneier.com/blog/archives/2007/02/a_new_secure_ha.html] to come up with a new, stronger hash function to replace all of the above.

!! See also

* [CRC]

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CategoryCryptography

9 pages link to CryptographicHash:

Last edited on Sunday, March 1, 2009 9:02:55 pm by AristotlePagaltzis

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