Sony CLEFIA encryption technology adopted as an international standard

Sony announced that the company's 2007 general-purpose key group encryption algorithm "CLEFIA" has been adopted as one of the international standards for lightweight cryptography ("ISO/IEC 29192").

This release shows that the CLEFIA algorithm supports the same interface as the US government's Advanced Encryption Standard (AES: Advanced Encryption Standard). The length of the packet is 128 bits, and the key length can be selected from 128 bits, 192 bits, and 256 bits. . The most important feature is that high packaging efficiency is achieved while ensuring safety.

CLEFIA was developed based on the latest encryption design theory to ensure high security. In addition, a common Feistel structure that is suitable for compact packaging is adopted, and the "diffusion matrix switching method" that ensures security even when the amount of operations is controlled to a low level, and the data processing section and the key scheduling section are generalized. As a result, high-performance encapsulation of hardware and software that previously was difficult to achieve was achieved.

Due to its high packaging efficiency, CLEFIA can also achieve higher performance in resource-constrained devices and devices that require high power efficiency. In addition to its original purpose, CLEFIA is also expected to be applied to the ISO/IEC 29192 target—lightweight encryption applications such as smart cards, RFID tags, sensor networks, and medical devices.