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New Authentication Code Urged For Digital Data
The National Institute of Standards and Technology (NIST) is recommending a new algorithm for authenticating digital data for federal agencies. Called CMAC (cipher-based message authentication code), the algorithm can authenticate the source of digital data, such as messages sent over the Internet, and thus provide assurance that the data have not been modified either intentionally or accidentally. The main component of CMAC is a block cipher. Within encryption algorithms, block ciphers are used to scramble the data after they are broken down into blocks. In CMAC, the block cipher creates a digital tag that authorized parties can use to verify that the received message has not been altered. Other authentication mechanisms, such as the hash function message authentication code (HMAC) and digital signatures, have long been available. CMAC is a new option, intended especially for devices in which a block cipher is more readily available than the components of these other mechanisms. CMAC was submitted to NIST as part of an ongoing public effort to develop and update block cipher-based algorithms, called modes of operation. A team of Japanese scientists, Tetsu Iwata and Kaoru Kurosawa of Ibaraki University, developed CMAC based on an earlier proposal by a team of American scientists, John Black of the University of Nevada, Reno, and Philip Rogaway of the University of California at Davis. Recommendation for Block Cipher Modes of Operation: The CMAC Mode for Authentication (NIST Special Publication 800-38B) is available here. Related Links Crypto Tool Kit SpaceWar Search SpaceWar Subscribe To SpaceWar Express 
The Web: Attack Of The Computer Zombies
Chicago (UPI) Jun 01, 2005A computer enthusiast downloads the latest saucy Paris Hilton ad, from the Carl's Jr. chain, from the Internet and sends it to his office colleagues. Later that evening, his company finds 67 of its 92 computers have been invaded and are being controlled remotely by hackers, who have sent out a million e-mails touting Viagra, the male potency supplement. |
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