[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Where does your data want to go today?
At 12:47 AM -0700 5/30/96, E. ALLEN SMITH wrote:
>From: IN%"[email protected]" "Marshall Clow" 29-MAY-1996 19:18:31.60
>
>>* Why encrypt before compression? If the encryption is any good, then the
>>encrypted data won't compress much at all. However, compression before
>>encryption has its own problems.
>
> What problems does compression before encryption have? It at least
>seems to work for PGP.
>
Most compression schemes put a header/index on the front of the compressed data.
This makes recognizing the correct decryption very simple.
Call it a limited "known plaintext" situation.
-- Marshall
Marshall Clow Aladdin Systems <mailto:[email protected]>
"We don't have to take it; never have, never will.
Gonna shake it, gonna break it; let's forget it: better still" --The Who, "Tommy"