[9934] in cryptography@c2.net mail archive
Announcement of NIST Modes Recommendation
daemon@ATHENA.MIT.EDU (Morris Dworkin)
Thu Dec 13 12:10:24 2001
Message-Id: <5.1.0.14.2.20011213101514.00a9f628@email.nist.gov>
Date: Thu, 13 Dec 2001 10:19:03 -0500
To: dworkin@nist.gov
From: Morris Dworkin <dworkin@nist.gov>
Mime-Version: 1.0
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Now that the AES FIPS has been approved, here is an update from NIST on
modes of operation.
The NIST special publication SP 800-38A, "Recommendation for Block Cipher
Modes of Operation," is available online, at
http://csrc.nist.gov/publications/nistpubs/index.html. Five
confidentiality modes are specified for use with any FIPS-approved block
cipher, such as the AES. The modes in SP 800-38A are updated versions of
the ECB, CBC, CFB, and OFB modes that are specified in FIPS Pub. 81; in
addition, SP 800-38A specifies the CTR mode.
NIST also expects to publish a 2002 edition of SP 800-38A in which the
domain of the CBC mode is extended (to include plaintexts whose bit lengths
are not a multiple of the block size); all of the technical material that
is specified in the 2001 edition is expected to remain valid.
The next document in the series, SP 800-38B, will specify a variant of the
CBC-MAC authentication mode.
Modes development is expected be an ongoing effort; later parts of the
series may be devoted to the specification of new modes.
Regards,
Morris Dworkin
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