Re: V3 secret keys

[Ben Laurie <ben@xxxxxxxxxxxxx>]

Daniel A. Nagy wrote:
> On Thu, Feb 02, 2006 at 01:48:38PM +0000, Ben Laurie wrote:
>> in 5.5.3 it says:
>>
>> "Furthermore, the CFB state is resynchronized at the beginning of each
>> new MPI value,  so that the CFB block boundary is aligned with the start
>> of the MPI data."
>>
>> I can't find anywhere a precise (or even an imprecise) definition of
>> "resynchronized". What exactly does it mean?
>>
>> Does it mean that the IV is reset to whatever it was at the start of the
>> current block? Does it mean that we use the partially-updated IV, but
>> set the position back to the beginning? Does it mean we reset the IV to
>> the initial value and start again? Or what?
>>
>> Cheers,
>>
>> Ben.
> 
> It means the usual CFB synchronization with outputting a partial block and
> shifting the IV.

If that means anything at all, you appear to be describing standard CFB
when applied to a partial block, which I assume the above is not.

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