On Tue, Dec 12, 2017 at 5:36 PM, Łukasz Stelmach <l.stelmach@xxxxxxxxxxx> wrote: > Reseed PRNG after reading 65 kB of randomness. Although this may reduce > performance, in most cases the loss is not noticeable. Also the time > based threshold for reseeding is changed to one second. Reseeding is > performed whenever either limit is exceeded. > > Reseeding of a PRNG does not increase entropy, but it helps preventing > backtracking the internal state of the device from its output sequence, > and hence, prevents potential attacker from predicting numbers to be > generated. > > Signed-off-by: Łukasz Stelmach <l.stelmach@xxxxxxxxxxx> > Reviewed-by: Stephan Mueller <smueller@xxxxxxxxxx> > --- > drivers/crypto/exynos-rng.c | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) > Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> Best regards, Krzysztof
