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    SubjectRe: [PATCH] let Net Devices feed Entropy, updated (1/2)
    Alex Bligh - linux-kernel wrote:
    >
    > > The device get's powerd up at a random time for the attacker.
    > > That's entierly sufficient if you assume that your checksum function
    > > f(i) hat the property that there is no function g, where we have
    > > f(i+1)=g(f(i)), where g has a polynomial order over the time domain.
    > > i is unknown for the attacker.
    >
    > So, your argument is that there is no point in all this
    > entropy collection anyway. So if everything is hunky dory,
    > why have /dev/random block under such a circumstance?

    You are entierly right.

    The primary reson of invention of /dev/random was the need
    for a bit of salt to the initial packet sequence number inside
    the networking code in linux. And for this purspose the
    whole /dev/*random stuff is INDEED a gratitious overdesign.
    For anything else crypto related it just doesn't cut the corner.
    If you look at the archives I have objected it strongly in the history.
    -
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