Re: SSN encryption

From: Paul Rubin (//phr.cx_at_NOSPAM.invalid)
Date: 09/30/05

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    Date: 29 Sep 2005 20:14:17 -0700

    arachnidster@gmail.com writes:
    > Unless I'm missing something fairly major, why not just use an HMAC...
    > Alternately, just number sequentially, as someone else suggested.

    The problem with HMAC is the output has to be much longer than the
    input or else collisions are likely. The problem with numbering
    sequentially is it requires preprocessing a huge database rather than
    encrypting query output on the fly. Whether those problems are
    insurmountable is a different question.

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