diff options
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 62dbd1a99fa3..75ebd1a2746c 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1403,18 +1403,22 @@ config CRYPTO_SALSA20 Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html> config CRYPTO_CHACHA20 - tristate "ChaCha20 cipher algorithm" + tristate "ChaCha20 stream cipher algorithms" select CRYPTO_BLKCIPHER help - ChaCha20 cipher algorithm, RFC7539. + The ChaCha20 and XChaCha20 stream cipher algorithms. ChaCha20 is a 256-bit high-speed stream cipher designed by Daniel J. Bernstein and further specified in RFC7539 for use in IETF protocols. - This is the portable C implementation of ChaCha20. - - See also: + This is the portable C implementation of ChaCha20. See also: <http://cr.yp.to/chacha/chacha-20080128.pdf> + XChaCha20 is the application of the XSalsa20 construction to ChaCha20 + rather than to Salsa20. XChaCha20 extends ChaCha20's nonce length + from 64 bits (or 96 bits using the RFC7539 convention) to 192 bits, + while provably retaining ChaCha20's security. See also: + <https://cr.yp.to/snuffle/xsalsa-20081128.pdf> + config CRYPTO_CHACHA20_X86_64 tristate "ChaCha20 cipher algorithm (x86_64/SSSE3/AVX2)" depends on X86 && 64BIT |