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SHA-256 is part of the SHA-2 family of hash functions with a 256-bit output and a 128-bit security level.

2 votes
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Can a hash of the original plain text file be used to brute force an encrypted copy?

It depends on the contents of your files. If the contents has high entropy and is unpredictable then you're probably safe. However, if the contents is a password or a pin number, then brute forcing i …
hunter's user avatar
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4 votes
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Hashing high entropy key into AES format

I seem to recall that shared secret keys should be hashed before using as encryption keys (some brief discussion here). If your key is already high-entropy, then hashing with SHA256 is fine. If you …
hunter's user avatar
  • 4,007