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Title : UMAC: Message Authentication Code using Universal Hashing
Author(s) : T. Krovetz
Filename : draft-krovetz-umac-02.txt
Pages : 23
Date : 2004-10-12
This specification describes how to generate an authentication tag
using the UMAC message authentication algorithm. UMAC is designed to
be very fast to compute in software on contemporary uniprocessors.
Measured speeds are as low as one cycle per byte. UMAC relies on
addition of 32-bit and 64-bit numbers and multiplication of 32-bit
numbers, operations well-supported by contemporary machines.
To generate the authentication tag on a given message, a "universal"
hash function is applied to the message and key to produce a short,
fixed-length hash value, and this hash value is then xor'ed with a
key-derived pseudorandom pad. UMAC enjoys a rigorous security
analysis and its only internal "cryptographic" use is a block cipher,
AES, to generate the pseudorandom pads and internal key material.
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