GOST (hash function)

GOST (hash function)

The GOST hash function, defined in the standards GOST R 34.11-94 and GOST 34.311-95, is a 256-bit cryptographic hash function. It was initially defined in the Russia's national standard GOST R 34.11-94 "Information Technology - Cryptographic Information Security - Hash Function". The equivalent standard used by other member-states of the CIS is GOST 34.311-95.

The hash function is based on the GOST block cipher.

GOST hashes

The following are some examples of GOST hashes:

GOST("The quick brown fox jumps over the lazy dog") = 77b7fa410c9ac58a25f49bca7d0468c9296529315eaca76bd1a10f376d1f4294

Even a small change in the message will, with overwhelming probability, result in a completely different hash due to the avalanche effect. For example, changing d to c:

GOST("The quick brown fox jumps over the lazy cog") = a3ebc4daaab78b0be131dab5737a7f67e602670d543521319150d2e14eeec445

The hash of the zero-length string is:

GOST("") = ce85b99cc46752fffee35cab9a7b0278abb4c2d2055cff685af4912c49490f8d

See also

* GOST standards

External links

* [http://www.autochthonous.org/crypto/gosthash.tar.gz C implementation and test vectors] for GOST hash function from Markku-Juhani Saarinen, also contains draft translations into English of the GOST 28147-89 and GOST R 34.11-94 standards. Bugfixed version, see [http://www.autochthonous.org/crypto/] .


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