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Is it safe to derive an IV partially from the secret data if it is hashed before use?
To help ensure uniqueness of IV's used in a CFB AES-256 cipher, software I know of gathers bits from various sources including the plaintext being enciphered, and runs that through an SHA-256 hash. ...
Jun 10 '13 at 5:36
newest sha256 initialisation-vector questions feed
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