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CONFIG_CRYPTO_AES_PPC_SPE: AES cipher algorithms (PPC SPE)

General informations

The Linux kernel configuration item CONFIG_CRYPTO_AES_PPC_SPE:

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AES cipher algorithms (FIPS-197). Additionally the acceleration for popular block cipher modes ECB, CBC, CTR and XTS is supported. This module should only be used for low power (router) devices without hardware AES acceleration (e.g. caam crypto). It reduces the size of the AES tables from 16KB to 8KB + 256 bytes and mitigates timining attacks. Nevertheless it might be not as secure as other architecture specific assembler implementations that work on 1KB tables or 256 bytes S-boxes.

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