Streams, Voice, and Sensitive Dependence

It is my understanding that the PGP algorithm is primarily intended as a block
cypher.  Therefore, wouldn't an Outer Block stream cypher be more effective for
phone conversations?  Both solutions require hardware for a practical (tolerably
noiseless) implementation, so there's nothing to be gained by streaming data
into a block format.

In any case, there has been a lot of recent work in dynamic systems (Chaos),
especially in the fast computations of Julia Sets.  Has anyone seen a paper on
exploiting the sensitive dependance in these systems for pseudorandom number
generation?

At 1:53 PM -0500 on 12/4/98, Lee Davis wrote:


> It is my understanding that the PGP algorithm is primarily intended as a
>block
> cypher.

PGP is not a cipher. PGP is an application with a bunch of ciphers in it,
most of the block ones.

PGPfone is not a cipher either, it's an applicatoin with a bunch of ciphers
in it, most of them stream ones...

Cheers,
Robert Hettinga
-----------------
Robert A. Hettinga <mailto: rah@philodox.com>
Philodox Financial Technology Evangelism <http://www.philodox.com/>
44 Farquhar Street, Boston, MA 02131 USA
"... however it may deserve respect for its usefulness and antiquity,
[predicting the end of the world] has not been found agreeable to
experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'

At 2:38 PM -0500 on 12/4/98, Robert Hettinga wrote:

> PGP is not a cipher. PGP is an application with a bunch of ciphers in it,
> most of the block ones.
          ^them...

...and I'm not even sure about the 'most' part. Could be all of them.

Cheers,
Robert Hettinga

-----------------
Robert A. Hettinga <mailto: rah@philodox.com>
Philodox Financial Technology Evangelism <http://www.philodox.com/>
44 Farquhar Street, Boston, MA 02131 USA
"... however it may deserve respect for its usefulness and antiquity,
[predicting the end of the world] has not been found agreeable to
experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'