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2
votes
1answer
52 views
What information to include is the 'info' input for HKDF?
The RFC states the following:
3.2. The 'info' Input to HKDF
While the 'info' value is optional in the definition of HKDF, it is often of great importance in applications. Its main ...
3
votes
1answer
100 views
Key collision in scrypt and hkdf
I am developing a mostly-offline authorization system that authorizes a user using an deterministically generated AuthKey derived from a MasterKey derived from a high-entropy chunk of data (128 bits) ...
5
votes
2answers
185 views
Which risks are associated with deriving multiple keys from the same DH secret Z?
NIST recommends Krawczyk's HMAC-based key derivation function (HKDF) in SP-800-56C (PDF). HKDF shall e.g. be used to create keys from shared secrets after Diffie Hellman key establishment.
NIST ...
