Re: New entropy source proposal.

From: Garrett Wollman (wollman_at_khavrinen.lcs.mit.edu)
Date: 03/07/05

  • Next message: Colin Percival: "Re: Heads up: End of RELENG_4_8 support" 
    Date: Mon, 7 Mar 2005 14:44:49 -0500 (EST)
To: Mark Murray <markm@FreeBSD.ORG>

    <<On Mon, 07 Mar 2005 16:09:48 +0000, Mark Murray <markm@FreeBSD.ORG> said:

    > Did you have a noise source connected? I generated 1MB of data and it was not
    > very random at all. "hexdump -C data" showed the data was very poor indeed.

    The usual noise source is thermal noise in the machine itself. The
    process that I've heard described involves:

    0) Disconnecting any input sources.
    1) Turning the input gain all the way up.
    2) Taking only the least-significant bit of each sample.

    In order to use this in FreeBSD, we would probably want a compile
    option in the sound drivers to disable their use for other purposes
    (e.g., generating sound).

    -GAWollman

    _______________________________________________
    freebsd-security@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-security
    To unsubscribe, send any mail to "freebsd-security-unsubscribe@freebsd.org"

  • Next message: Colin Percival: "Re: Heads up: End of RELENG_4_8 support"