Re: Columbia crypto box

[Steven M. Bellovin]

In message <v03110705ba6dec92ddb0@[192.168.1.5]>, Bill Frantz writes:

>  * Fast key setup (Forget tossing the 256 bytes of key stream.
>    The designers weren't crypto engineers.  Personally, I'd toss the
>    first 1024.)


I reran my script assuming that the first 1024 bytes of each packet 
were discarded.  It triples the cost of encryption, compared to 
discarding nothing.

There may be a cryptographically sound reason to discard that much, but 
it's not without cost.

                --Steve Bellovin, http://www.research.att.com/~smb (me)
                http://www.wilyhacker.com (2nd edition of "Firewalls" book)



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