Name: draft-krovetz-umac-02
Title: UMAC: Message Authentication Code using Universal Hashing
State: Active
Authors: Ted Krovetz
Group: Individual Submissions (none)
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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