On Thu, Nov 30, 2000 at 08:42:07PM -0500, No User wrote:
>
> Big Blue says it can make encryption twice as fast. But the company hyped a similar
>advancement years ago; experts say that idea didn't amount to much, and this one
>won't either.
> By Elinor Abreu
> IBM is announcing a new algorithm on Thursday that it says will double the speed at
>which online communications are encrypted. But several crypto experts say that IBM is
>fixing something that isn't broken and that Big Blue has a history of tooting its
>horn needlessly.
>
> IBM's new as-yet-unnamed security algorithm simultaneously encrypts and
>authenticates messages. It works with symmetric cryptography in which the same secret
>key, or mathematical code, is used to encrypt and decrypt, as opposed to public key
>cryptography, in which two different keys are used. The new algorithm has been
>submitted to the U.S. Patent Office and proposed to the National Institute of
>Standards.
I'm guessing what's described above is this:
*************************
Stanford Security Seminar
Charanjit Jutla of
IBM Watson
Thursday, Dec 7 at 4:15pm
(Note unusual day)
Gates 4B area
*************************
Encryption Modes with Almost Free Message Integrity
We define a new mode of operation for block encryption which
in addition to assuring confidentiality also assures
message integrity. In contrast, previously for message
integrity a separate pass was required to compute a
cryptographic message authentication code (MAC).
The new mode of operation, called Integrity Aware CBC (IACBC),
requires a total of m+log m block encryptions on a plain-text
of length m blocks. The well known CBC (cipher block chaining)
mode requires m block encryptions. The second pass of computing
the CBC-MAC essentially requires additional m block encryptions.
A new highly parallelizable mode (IAPM) is also shown to
be secure for both encryption and message integrity.
We also show a lower bound of Omega(log m) additional block
encryptions for any reasonably modeled (linear)
scheme which assures message integrity along with
confidentiality.
See http://crypto.stanford.edu/seclab/sem.html
--
Eric Murray Consulting Security Architect SecureDesign LLC
http://www.securedesignllc.com PGP keyid:E03F65E5
