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|Designers||Michael Jacobson Jr., Klaus Huber|
|Key sizes||128, 192 or 256 bits|
|Block sizes||128 bits|
|Rounds||6 or 8|
In cryptography, MAGENTA is a symmetric key block cipher developed by Michael Jacobson Jr. and Klaus Huber for Deutsche Telekom. The name MAGENTA is an acronym for Multifunctional Algorithm for General-purpose Encryption and Network Telecommunication Applications. (The color magenta is also part of the corporate identity of Deutsche Telekom.) The cipher was submitted to the Advanced Encryption Standard process, but did not advance beyond the first round; cryptographic weaknesses were discovered and it was found to be one of the slower ciphers submitted.
After the presentation of the cipher at the first AES conference, several cryptographers immediately found vulnerabilities. These were written up and presented at the second AES conference (Biham et al., 1999).