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Thursday, January 26, 2012
Sony's CLEFIA Encryption Technology Adopted as an International Standard


Sony's 'CLEFIA,' cryptography technique was adopted as one of the ISO/IEC 29192 International Standards in lightweight cryptography.

CLEFIA is a lightweight cryptography technology suitable securing the network communications of low-power devices or those with limited hardware or memory. CLEFIA has the same interface as the US government's Advanced Encryption Standard (AES). This block cipher has a block length of 128 bits, while key length can be selected from 128 bits, 192 bits or 256 bits. The most impressive feature of CLEFIA is its realization of implementation efficiency while maintaining a high level of security. The development of CLEFIA maintains superior security based on the latest block cipher design theory. Furthermore, CLEFIA adopts the general Feistel structure, which is suited for implementation in constrained environments. Also, the 'Diffusion Switching Mechanism' (DSM) is employed to reduce processing operations whilst ensuring security. In addition, components for data processing and key scheduling part are shared.

CLEFIA is suited for lightweight cryptographic applications as indicated in ISO/IEC 29192 in smartcards, RFID tags, sensor networks, medical devices and more, in addition to conventional applications.

Having been recognized as an ISO/IEC International Standard on this occasion, Sony will strive to expand the application of CLEFIA in a variety of devices and services.


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