[Cryptography] Whitening Algorithm

Ray Dillinger bear at sonic.net
Sat Jul 25 02:19:50 EDT 2015

On 07/24/2015 04:02 PM, Ron Garret wrote:
> Wait, what???
>>> ``Spritz is Rivest and Schuldt's redesign of RC4. It retains all of the
>>>  problems that RC4 had.
> RC4 is broken.  If Spritz “retains all the problems that RC4 had” doesn’t that mean that Spritz is also broken?

It retains the protocol particulars that RC4 had prior to its major
breakage - Initialization takes some time so it's got poor key
agility, should be used with an IV because it's a stream cipher
and becomes broken if a full key is reused, etc.  Those problems.
Not (at least not yet) the cryptographic break problem.


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