FUD about CGD and GBDE

[Perry E. Metzger]

Thor Lancelot Simon <tls at rek.tjls.com> writes:
> On Wed, Mar 02, 2005 at 05:55:50PM -0800, ALeine wrote:
>> 
>> He designed GBDE to always be harder than and never easier
>> to break than the cryptographic algorithms it relies on.
>
> Some very well-intentioned (and plenty smart) people at MIT
> designed the PCBC cipher mode to always be harder than and
> never easier to break than the cryptographic algorithms it
> relies on.  Don Coppersmith designed the CBCM mode to always
> be harder than and never easier to break than the CBC mode
> of the 3DES algorithm.

FYI, Don Coppersmith has forgotten more crypto than most people in the
world in the field have ever known. Among other things to his credit
was this little algorithm called DES that he helped bring to life. He
too makes mistakes.

Perry