HKDF: ikm, salt and info values - Cryptography Stack Exchange
2018年11月19日 · (1) Run HKDF (extract-then-expand) with the scrypt result as input key material (ikm) and a NEW random salt for each file to be encrypted (2) Run HKDF (extract-then …
key derivation - Difference between RFC-5869 (HKDF) and SP800 …
2016年11月4日 · The HKDF scheme from RFC-5869 (and also NIST SP-800-56c) was originally proposed by Hugo Krawczyk in [1] as extract-then-expand KDF. As the name suggests, the …
Differences between HMAC and HKDF in a specific case
2015年5月29日 · I think HKDF is the easiest solution in my case. This explanation gives a clear definition of HKDF. In the case where the number of key bits requested from the KDF is equal …
HKDF: Difference between salt and info - Cryptography Stack …
If all you're using HKDF for is deriving subkeys from a uniformly random master key, you don't really need the Extract part of HKDF. So you can simply use your master key directly as the …
Deriving 2 keys using HKDF - Cryptography Stack Exchange
HKDF assumes that the salt is not attacker-chosen. If an attacker can influence the IV, then that's a definite no. OTOH, if the IV known to be completely independent of the key, it should be …
symmetric - Is HMAC a suitable substitute for HKDF?
2018年4月16日 · The other, earlier half of HKDF is the HKDF-extract function, whose purpose is to take random inputs that are not directly suitable for use directly as cryptographic keys …
Key Derivation Functions vs. Password Hashing Schemes
That said, this particular pathology is fixed in Argon2, but HKDF-Expand may still be more convenient for labeling the subkeys by purpose. Summary: If you have a high min-entropy but …
collision resistance - How many different keys can be derived with …
2021年2月24日 · How many different keys can be derived with HKDF before two outputs are identical? This question is about collision resistance, not about generating different keys with …
hash - HKDF randomness extraction - salt or no salt?
2022年1月6日 · The Randomness Extraction and Key Derivation paper (linked to by the HKDF paper) states: In addition, the "monolithic" randomness assumption on a single (unkeyed) …
Key derivation functions (KDF): What are they, what are their main ...
2022年6月14日 · The HKDF paper provides as good a summary as any:. A Key derivation function (KDF) is a basic and essential component of cryptographic systems: Its goal is to take …
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