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PRESENT (cipher)
PRESENT is a lightweight block cipher, developed by the Orange Labs (France), Ruhr University Bochum (Germany) and the Technical University of Denmark in 2007. PRESENT is designed by Andrey Bogdanov, Lars R. Knudsen, Gregor Leander, Christof Paar, Axel Poschmann, Matthew J. B. Robshaw, Yannick Seurin, and C. Vikkelsoe. The algorithm is notable for its compact size (about 2.5 times smaller than AES).〔(【引用サイトリンク】title=Ultra-lightweight encryption method becomes international standard )〕
==Overview==
The block size is 64 bits and the key size can be 80 bit or 128 bit. The non-linear layer is based on a single 4-bit S-box which was designed with hardware optimizations in mind. ''PRESENT'' is intended to be used in situations where low-power consumption and high chip efficiency is desired. The International Organization for Standardization and the International Electrotechnical Commission included PRESENT in the new international standard for lightweight cryptographic methods.〔〔(【引用サイトリンク】title=ISO/IEC 29192-2:2012 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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