Warning! New cryptographic modes!

Matt Ball matt.ball at ieee.org
Mon May 11 19:08:52 EDT 2009


On Mon, May 11, 2009 at 2:54 PM, Jerry Leichter <leichter at lrw.com> wrote:
> On May 11, 2009, at 2:16 PM, Roland Dowdeswell wrote:
>
>> On 1241996128 seconds since the Beginning of the UNIX epoch
>> Jerry Leichter wrote:
>> I'm not convinced that a stream cipher is appropriate here because
>> if you change the data then you'll reveal the plaintext.
>
> Well, XOR of old a new plaintext.  But point taken.
>
> Sounds like this might actually be an argument for a stream cipher with a
> more sophisticated combiner than XOR.  (Every time I've suggested that, the
> response has been "That doesn't actually add any strength, so why bother"---------------------------------------------------------------------
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