OSEC

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From: Andrew Brown (atatatATATDOT.NET)
Date: Thu Feb 15 2001 - 18:00:21 CST

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    >> * it doesn't _quite_ degenerate to just the code
    >> you pasted above; several timings are mixed in,
    >> not just at seed time but over the course of the
    >> daemon's run.
    >
    >Have you estimated the total entropy supplied by this seeding activity? It
    >needs to be (at the very least) greater than the entropy consumed in
    >generating

    you're almost comparing apples to oranges here.

    >1) long term server keys

    these are usually generated one time: when the software is installed.

    >2) 'ephemeral' server RSA keys

    this is the use of the entropy that most people are probably concerned
    with these days, although these are *typically* generated only once an
    hour.

    >3) session keys

    these are generated by the client. they should have their own sources
    of entropy, the use of which should not affect the server.

    and you missed 4) cookies

    the server sends these to the client to (attempt to) defend against
    tcp hijacking or ip spoofing.

    --
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