Re: Is Fax Dead Yet?

Spehro Pefhany wrote:
On Mon, 21 Apr 2008 19:39:19 -0700, the renowned D from BC
<myrealaddress@xxxxxxxxx> wrote:

On Tue, 22 Apr 2008 03:35:09 +0200 (CEST), Anonymous <cripto@xxxxxxx>
wrote:

Joel Koltner wrote:

"Robert Latest" <boblatest@xxxxxxxxx> wrote in message news:674620F2lp232U3@xxxxxxxxxxxxxxxxxxxx
128 bit -- high-end?
When it comes to consumer electronics, 128-bit encryption is still "high end."
When it comes to encryption in general 128 bits are still high end,
depending on the implementation. Robert is apparently very unaware
of the actual math behind modern crypto.

I mean, that's like Blu-Ray players and other heavily DRM stuff... DVDs are only 40 bits, and a poorly implemented system to boot! :-)
SSL/TLS is 128, and considered plenty secure. Even "weak" 40 bit SSL
is considered much stronger than the crap implementations used in
DRM. Numbers of bits has far less to do with things than some
neophytes believe.
Reminds me of my college days with the 486 processor.
I played with some homebrew encryption ideas.
I had a random number generator shift all the document characters. The random numbers used were stored to make a big fat 'key file'
which was a large as the document.
Without the 'key file', the document is just noise and should be
uncrackable.
asdliupiellkwjpbu'ldjkpojeojlmad;viwojojd << It can't be decoded.
It's just noise.

That's called a "one-time pad" and cannot be decoded (assuming the pad
itself is random) unless you start re-using it for other documents (or
allow it to become non-secret before the value of the information is
zero). One problem is communicating the pad from one end to the other.
Another is a lack of authentication.


Communicating the pad? Glue under postage stamp, don a dark trenchcoat, hat, dark sunglasses, brisk walk to mailbox, look over shoulder, look over shoulder some more, drop the letter in, push Smith&Wesson back into holster, saunter down the road and whistle a tune. At least that's how it was done in the old movies.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
.

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