HMAC is a specific type of message authentication code that combines a cryptographic hash function with a secret cryptographic key. Like any message authentication code, it can be used to verify both the integrity and the authenticity of a message at once, and as a keyed hash function it can also serve inside a key derivation scheme or a key stretching scheme.
Facts
Time Complexity
Time Complexity (category) Sources
1. HMAC Algorithm (Wikipedia)
Wikipedia infobox: time complexity linearQuote, Wikipedia infobox: time complexity linear
linear
IETF RFC Editor: RFC 2104: HMAC: Keyed-Hashing for Message Authentication
IETF RFC EditorIn Group: Message Authentication Code, AbstractQuote, In Group: Message Authentication Code, Abstract
This document describes HMAC, a mechanism for message authentication using cryptographic hash functions.
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