• Stephan Mueller's avatar
    crypto: jitterentropy - add jitterentropy RNG · bb5530e4
    Stephan Mueller authored
    The CPU Jitter RNG provides a source of good entropy by
    collecting CPU executing time jitter. The entropy in the CPU
    execution time jitter is magnified by the CPU Jitter Random
    Number Generator. The CPU Jitter Random Number Generator uses
    the CPU execution timing jitter to generate a bit stream
    which complies with different statistical measurements that
    determine the bit stream is random.
    The CPU Jitter Random Number Generator delivers entropy which
    follows information theoretical requirements. Based on these
    studies and the implementation, the caller can assume that
    one bit of data extracted from the CPU Jitter Random Number
    Generator holds one bit of entropy.
    The CPU Jitter Random Number Generator provides a decentralized
    source of entropy, i.e. every caller can operate on a private
    state of the entropy pool.
    The RNG does not have any dependencies on any other service
    in the kernel. The RNG only needs a high-resolution time
    Further design details, the cryptographic assessment and
    large array of test results are documented at
    CC: Andreas Steffen <andreas.steffen@strongswan.org>
    CC: Theodore Ts'o <tytso@mit.edu>
    CC: Sandy Harris <sandyinchina@gmail.com>
    Signed-off-by: default avatarStephan Mueller <smueller@chronox.de>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
jitterentropy.c 26.7 KB