Sony Introduces CLEFIA

Sunday, May 19, 2013

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The new product is based on the company's Diffusion Switching Mechanism technology.
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Saturday, March 24, 2007: Sony Corporation has launched CLEFIA, a new highly secure and efficient block cipher algorithm that delivers advanced copyright protection and authentication, which is essential in the growing environment of digital data distribution, such as music and images. Based on cutting edge cipher design techniques, Sony's CLEFIA block cipher maintains high security levels while providing both hardware and software implementation capabilities, the combination of which had proved difficult until now.

Sony's newly developed Diffusion Switching Mechanism (DSM) technology achieves secure cipher algorithms, even with fewer operations, by selecting the optimum diffusion matrices in the Feistel structure. This technology enables reductions in gate size when implemented in hardware and greater implementation efficiency when used in software.

The CLEFIA interface corresponds to 128-bit block cipher technology such as the US government's Advanced Encryption Standard (AES) and the ISO/IEC 18033-3 International Standards. Block length is 128 bits, while key length can be selected from 128 bits, 192 bits and 256 bits. The CLEFIA cipher is meticulously designed to concentrate cryptanalysis techniques and achieve sufficient immunity against known cryptanalytic attacks.

In future, Sony will seek to establish an environment in which CLEFIA can be used across various applications and products such as AV devices, while continuing to develop technologies that customers can use with confidence.

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