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| -rw-r--r-- | Doc/library/hashlib.rst | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/Doc/library/hashlib.rst b/Doc/library/hashlib.rst index 53320d9..269e8a8 100644 --- a/Doc/library/hashlib.rst +++ b/Doc/library/hashlib.rst @@ -249,8 +249,9 @@ include a `salt <https://en.wikipedia.org/wiki/Salt_%28cryptography%29>`_. a proper source, e.g. :func:`os.urandom`. The number of *iterations* should be chosen based on the hash algorithm and - computing power. As of 2013, at least 100,000 iterations of SHA-256 are - suggested. + computing power. As of 2022, hundreds of thousands of iterations of SHA-256 + are suggested. For rationale as to why and how to choose what is best for + your application, read *Appendix A.2.2* of NIST-SP-800-132_. *dklen* is the length of the derived key. If *dklen* is ``None`` then the digest size of the hash algorithm *hash_name* is used, e.g. 64 for SHA-512. @@ -731,6 +732,7 @@ Domain Dedication 1.0 Universal: .. _SHA-3: https://en.wikipedia.org/wiki/NIST_hash_function_competition .. _ChaCha: https://cr.yp.to/chacha.html .. _pyblake2: https://pythonhosted.org/pyblake2/ +.. _NIST-SP-800-132: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf @@ -754,3 +756,6 @@ Domain Dedication 1.0 Universal: https://www.ietf.org/rfc/rfc8018.txt PKCS #5: Password-Based Cryptography Specification Version 2.1 + + https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf + NIST Recommendation for Password-Based Key Derivation. |