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Re: Speculative Mode for KeyIDs of all zeroes

1998-01-09 02:30:42
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G'day all.

Bill Stewart wrote:

The probability of a generating a key with KeyID of 0 is 2**-64.
It could happen by accident, though it probably won't, and worst case is
the lucky user of such a key will just have to check all messages 
sent to him that have KeyID 0 against all his keys.
Annoying, but no loss of functionality.

Is it so hard for a key generator to guarantee that it never produces
a 64 bit key of ID 0?  Generate another, or massage the original key in
a random way.

If you amortise the cost over all decryptions to be performed with that
key, it probably turns out to be cheaper.

Cheers,
Andrew Bromage

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