Pre-encrypt IV in CBC mode

Pre-encrypt IV in CBC mode

am 27.02.2006 09:09:28 von Ulf Reiman

Assume an IV that is IV´= IV+1
I have read in the web that pre encrypt the IV in CBC mode of block
crypto protects data from leaking information, can someone give me
information about papersof it, or how it works.=20

Regards
Ulf Reiman

Re: Pre-encrypt IV in CBC mode

am 27.02.2006 11:46:15 von Volker Birk

Ulf Reiman wrote:
> Assume an IV that is IV´= IV+1
> I have read in the web that pre encrypt the IV in CBC mode of block
> crypto protects data from leaking information, can someone give me
> information about papersof it, or how it works.

Sorry, it seems that you're not understanding what you're doing here
at all.

Please read some good books about cryptography first, then try to ask
questions, if there are any left then.

Books from Bruce Schneier usually are a very good idea to start with.

Yours,
VB.
--
Wenn Du "Ich sehe die Mathematik als einzigen Bereich an, wo es klare
Beweise gibt." und "Ich fuehle mich in einem Anzug unwohl." als Aussagen
mit aequivalentem Meinungsinhalt betrachtest, hast Du mit Deinem Gleichnis
recht. (Michail Bachmann zu Thomas Wallutis in d.a.s.r)

Re: Pre-encrypt IV in CBC mode

am 27.02.2006 14:27:06 von Ulf Reiman

My question is: if a have a counter in my IV, and the counter is like
this, counter=counter +1,every sent packet. I encrypt with some key the
IV and then a XOR it with the message and encrypt all of it together,
where can i get more information about the encryption about the IV,
papers and more..
Regards
Ulf