Re: cryptohistory (DES...)
From: Tom St Denis (tomstdenis_at_iahu.ca)
Date: 12/05/03
- Next message: Paul Rubin: "Re: cryptohistory (DES...)"
- Previous message: Dominic: "cryptohistory (DES...)"
- In reply to: Dominic: "cryptohistory (DES...)"
- Next in thread: Paul Rubin: "Re: cryptohistory (DES...)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Date: Fri, 05 Dec 2003 01:41:34 GMT
"Dominic" <dominicsmith501@hotmail.com> wrote in message
news:514ecc2b.0312041733.7f9e671c@posting.google.com...
> I'm trying to figure out, mainly for historic reasons, why DES3 is as
> it is.
>
> Why is it EDE3 rather than EEE3? The most plausible reason I have
> found so far is that if you make all 3 keys the same it reduces to
> normal DES.
Essentially.
> Why is it EDE2 rather tahn ED2? What is the benefit of encrypting the
> final time with the same key that was used the first time?
Look up meet-in-the-middle attacks on double encryption schemes.
Tom
- Next message: Paul Rubin: "Re: cryptohistory (DES...)"
- Previous message: Dominic: "cryptohistory (DES...)"
- In reply to: Dominic: "cryptohistory (DES...)"
- Next in thread: Paul Rubin: "Re: cryptohistory (DES...)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Relevant Pages
|
