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Results tagged with sha-2
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user 180
SHA-2 is a family of cryptographic hash functions designed by the NSA and published by NIST in 2001. The family includes various output lengths (224, 256, 384, and 512 bits).
15
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Accepted
Is SHA 2 suitable for key derivation?
In principle raw SHA2 is suitable for deriving an AES key from a DH shared secret.
But the "proper" solution is to use a KDF. My preferred choice is HKDF, which can use SHA256 as the underlying hash …
- 25.1k
9
votes
A simple block cipher based on the SHA-256 hash function
First of all, this no block-cipher at all. It's a stream-cipher. Thus you can use every key only once, and you can't use any cipher modes built on block-ciphers.
Your scheme is vulnerable to a known …
- 25.1k