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Results tagged with sha-256
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user 2820
SHA-256 is part of the SHA-2 family of hash functions with a 256-bit output and a 128-bit security level.
16
votes
2
answers
2k
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Why is the salt used only once in PBKDF2, while the password is used often?
The purpose of PBKDF2 is to create a derived key (DK) from a master password (PW) and a salt, often using a function like HMAC-SHA256. I have read that the salt should be as random as possible. But …
- 413
11
votes
1
answer
3k
views
Using SHA-256 with different initial hash value
FIPS 180-3 defines the initial hash value for SHA-256 as the first 32 bits of the fractional parts of the square roots of the first 8 primes 2..19. What would be the risks of using a different value …
- 413