Welcome to the resource topic for 2003/154
Title:
ManTiCore: Encryption with Joint Cipher-State Authentication
Authors: Cheryl Beaver, Timothy Draelos, Richard Schroeppel, Mark Torgerson
Abstract:We describe a new method for authenticated encryption, which uses
information from the internal state of the cipher to provide the
authentication. This methodology has a number of benefits. The
encryption has properties similar to CBC mode, yet the encipherment
and authentication mechanisms can be parallelized and/or
pipelined. The authentication overhead is minimal, so the
computational cost of the authenticated encryption is very nearly that
of the encryption process. Also, the authentication process remains
resistant against some IV reuse. We present a class of encryption
algorithms that are based on cryptographic hash functions. Because of
the hash function construction, the MTC4 class of methods supports
variable encryption block sizes up to twice the hash output block
length and trivially supports variable key lengths. We also provide a
more general construction for using the internal state of any
round-based block cipher as an authenticator. We give a concrete
example of the general construction that uses AES as the encryption
primitive. We provide performance measurements for all of our
constructions.
ePrint: https://eprint.iacr.org/2003/154
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