Description:
Secure Hash Algorithm 1 (SHA-1)
Complete Definition:
The SHA-1 Algorithm that takes a message of less than 264 bits in length and produces a 160-bit message digest. The large message digest provides security against brute-force collision and inversion attacks. SHA-1 [NIS94c] is a revision to SHA that was published in 1994.
The five algorithms are denoted SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512. The latter four variants are sometimes collectively referred to as SHA-2. SHA-1 produces a message digest that is 160 bits long; the number in the other four algorithms' names denote the bit length of the digest they produce.
RFCs and references
- US Secure Hash Algorithm 1 (SHA1) - RFC 3174
- IP Authentication using Keyed SHA1 with Interleaved Padding (IP-MAC) - RFC 2841
- Using HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 with IPsec - RFC 4868
- SECURE HASH STANDARD
- US Secure Hash Algorithms (SHA and HMAC-SHA) - RFC 4634
Also See:
