RFC 7008

A Description of the KCipher-2 Encryption Algorithm, August 2013

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S. Kiyomoto
W. Shin

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DOI:  http://dx.doi.org/10.17487/RFC7008

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This document describes the KCipher-2 encryption algorithm. KCipher-2 is a stream cipher with a 128-bit key and a 128-bit initialization vector. Since the algorithm for KCipher-2 was published in 2007, security and efficiency have been rigorously evaluated through academic and industrial studies. As of the publication of this document, no security vulnerabilities have been found. KCipher-2 offers fast encryption and decryption by means of simple operations that enable efficient implementation. KCipher-2 has been used for industrial applications, especially for mobile health monitoring and diagnostic services in Japan.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.

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