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HAS-160
HAS-160 is a cryptographic hash function designed for use with the Korean KCDSA digital signature algorithm. It is derived from SHA-1, with assorted changes intended to increase its security. It produces a 160-bit output. HAS-160 is used in the same way as SHA-1. First it divides input in blocks of 512 bits each and pads the final block. A digest function updates the intermediate hash value by processing the input blocks in turn. The message digest algorithm consists of 80 rounds. External links HAS-160 specificationRHash an open source command-line tool capable of calculating HAS-160. Cryptographic hash functions {{crypto-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KCDSA
KCDSA (Korean Certificate-based Digital Signature Algorithm) is a digital signature algorithm created by a team led by the Korea Internet & Security Agency (KISA). It is an ElGamal signature scheme, ElGamal variant, similar to the Digital Signature Algorithm and GOST R 34.10-94. The standard algorithm is implemented over GF(p), but an elliptic curve variant (EC-KCDSA) is also specified. KCDSA requires a collision-resistant cryptographic hash function that can produce a variable-sized output (from 128 to 256 bits, in 32-bit increments). HAS-160, another Korean standard, is the suggested choice. Domain parameters * p: a large prime such that , p, = 512 + 256i for i = 0, 1, \dots, 6. * q: a prime factor of p-1 such that , q, = 128 + 32j for j = 0, 1, \dots, 4. * g: a base element of order q in \operatorname(p). The revised version of the spec additional requires either that (p-1)/(2q) be prime or that all of its prime factors are greater than q. User parameters * x: signer's pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |