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CONFIG_CRYPTO_SM4: SM4 cipher algorithm

General informations

The Linux kernel configuration item CONFIG_CRYPTO_SM4:

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SM4 cipher algorithms (OSCCA GB/T 32907-2016).

SM4 (GBT.32907-2016) is a cryptographic standard issued by the Organization of State Commercial Administration of China (OSCCA) as an authorized cryptographic algorithms for the use within China.

SMS4 was originally created for use in protecting wireless networks, and is mandated in the Chinese National Standard for Wireless LAN WAPI (Wired Authentication and Privacy Infrastructure) (GB.15629.11-2003).

The latest SM4 standard (GBT.32907-2016) was proposed by OSCCA and standardized through TC 260 of the Standardization Administration of the People's Republic of China (SAC).

The input, output, and key of SMS4 are each 128 bits.

See also: https://eprint.iacr.org/2008/329.pdf

If unsure, say N.

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