I had a chance to get hands on a few CPUs that have hardware accelarators for cryptographic operations such as AES encryption and SHA hashing. Since I could not find this information for all of them on the Web, here's a list, to be updated when more is available. Some use the Padlock engine, some Intel AES-NI. Data was obtained with the cryptsetup benchmark command.
Like the Via C7 processor, it features the Padlock engine for acceleration of 128-bit or 256-bit encryption operations, not 512 and not in other modes than cbc.
PBKDF2-sha1 289982 iterations per second
PBKDF2-sha256 195047 iterations per second
PBKDF2-sha512 116198 iterations per second
PBKDF2-ripemd160 193893 iterations per second
PBKDF2-whirlpool 55727 iterations per second
# Algorithm | Key | Encryption | Decryption
aes-cbc 128b 396.6 MiB/s 444.5 MiB/s
serpent-cbc 128b 22.2 MiB/s 47.0 MiB/s
twofish-cbc 128b 53.1 MiB/s 56.2 MiB/s
aes-cbc 256b 380.9 MiB/s 379.1 MiB/s
serpent-cbc 256b 26.8 MiB/s 47.0 MiB/s
twofish-cbc 256b 56.4 MiB/s 56.2 MiB/s
aes-xts 256b 92.6 MiB/s 92.4 MiB/s
serpent-xts 256b 43.3 MiB/s 43.5 MiB/s
twofish-xts 256b 50.9 MiB/s 51.0 MiB/s
aes-xts 512b 67.5 MiB/s 67.5 MiB/s
serpent-xts 512b 43.6 MiB/s 43.5 MiB/s
twofish-xts 512b 51.1 MiB/s 51.0 MiB/s
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Also called Avoton, this family of Atom processors is not as bad as its predecessors, but still terrible. It is clearly outperformed by the Via Nano on all accelerated operations. AES-NI supports 512-bit keys operations and xts mode, which gives it a big advantage over the Padlock. Non-accelerated operation are only 20 to 50 percent faster than the Nano above, which tells you how bad this processor is.
PBKDF2-sha1 134295 iterations per second
PBKDF2-sha256 80709 iterations per second
PBKDF2-sha512 55727 iterations per second
PBKDF2-ripemd160 120470 iterations per second
PBKDF2-whirlpool 43574 iterations per second
# Algorithm | Key | Encryption | Decryption
aes-cbc 128b 241.0 MiB/s 332.0 MiB/s
serpent-cbc 128b 30.8 MiB/s 74.7 MiB/s
twofish-cbc 128b 67.7 MiB/s 68.5 MiB/s
aes-cbc 256b 182.0 MiB/s 260.0 MiB/s
serpent-cbc 256b 30.9 MiB/s 75.0 MiB/s
twofish-cbc 256b 67.7 MiB/s 68.2 MiB/s
aes-xts 256b 292.0 MiB/s 292.0 MiB/s
serpent-xts 256b 69.4 MiB/s 69.0 MiB/s
twofish-xts 256b 63.0 MiB/s 63.0 MiB/s
aes-xts 512b 233.0 MiB/s 234.0 MiB/s
serpent-xts 512b 69.7 MiB/s 69.4 MiB/s
twofish-xts 512b 63.2 MiB/s 63.2 MiB/s
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vinvin wrote, on Tue, 03 Jan 2017 21:52:57 +0100
Via C7 is coming soon.
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