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1.
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Clear description of the referenced document:
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2.
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Status of approval:
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FIPS PUBS 197 has been approved by Secretary of Commerce.
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3.
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Justification for the specific reference:
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The AES in H.235V3 is used as an encryption algorithm for securing RTP voice payloads. It is included to provide superior security and performance over existing encryption algorithms.
The Advanced Encryption Standard (AES) specifies a FIPS-approved cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information. Encryption converts data to an unintelligible form called ciphertext; decrypting the ciphertext converts the data back into its original form, called plaintext. The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits.
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4.
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Current information, if any, about IPR issues:
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http://csrc.nist.gov/encryption/aes/rijndael/rijndael-ip.pdf and
http://csrc.nist.gov/encryption/aes/rijndael/rijndael-ip-update.pdf
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5.
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Other useful information describing the "Quality" of the document:
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AES is the final outcome of a cryptographic algorithm contest with Rijndael chosen as the AES candidate. AES has undergone the NIST review procedures. An AES reference implementation is available at http://csrc.nist.gov/encryption/aes/rijndael/
FIPS-197 was published in November 2001.
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6.
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The degree of stability or maturity of the document:
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AES is the final outcome of a cryptographic algorithm contest with Rijndael chosen as the AES candidate. AES has undergone the NIST review procedures. An AES reference implementation is available at http://csrc.nist.gov/encryption/aes/rijndael/
FIPS-197 was published in November 2001.
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7.
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Relationship with other existing or emerging documents:
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AES is referenced in several other standards such as J.170 and IETF SRTP
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8.
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Any explicit references within that referenced document should also be listed:
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[1] AES page available via http://www.nist.gov/CryptoToolkit./
[2] Computer Security Objects Register (CSOR): http://csrc.nist.gov/csor/./
[3] J. Daemen and V. Rijmen, AES Proposal: Rijndael, AES Algorithm Submission,/
September 3, 1999, available at [1]./
[4] J. Daemen and V. Rijmen, The block cipher Rijndael, Smart Card research and/
Applications, LNCS 1820, Springer-Verlag, pp. 288-296./
[5] B. Gladman’s AES related home page/
http://fp.gladman.plus.com/cryptography_technology/./
[6] A. Lee, NIST Special Publication 800-21, Guideline for Implementing Cryptography/
in the Federal Government, National Institute of Standards and Technology,/
November 1999./
[7] A. Menezes, P. van Oorschot, and S. Vanstone, Handbook of Applied Cryptography,/
CRC Press, New York, 1997, p. 81-83./
[8] J. Nechvatal, et. al., Report on the Development of the Advanced Encryption Standard/
(AES), National Institute of Standards and Technology, October 2, 2000, available at/
[1].
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9.
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Qualification of
NIST:
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Qualification of NIST: NIST is recognized under the provisions of ITU-T Recommendation A.5. Qualifying information is on file in TSB.
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10.
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Other (for any supplementary information):
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FIPS-PUB 197 is freely available at http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
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