Re: Unicode and Security

From: John Cowan (cowan@mercury.ccil.org)
Date: Mon Feb 04 2002 - 19:39:55 EST


Gaspar Sinai scripsit:

> Hold on there! You admit that unicode alrgorithm is *really*
> not reversable? I was just bluffing because I just saw that their
> is no reverse algorithm published in the standard!

It can't be reversable, as my little English = CIBARA demonstration
showed. The only way to make a reversable algorithm would be
to abandon the principle of phonetic internal ordering.

> Can you imagine the implications of this? Imagine somone signing
> a digital unicode document. He is looking at his viewer but
> what he signs is the ___bitstream___. So you claim that this guy
> who might have no connection to software industry at all will be
> able to run an algorithm - that does not exist - in his head?

No Real World document is going to make sense read both ways.
It will make sense one way, thus: "BARA-LA AW MALSI-AL mean
the Arabs and Islam respectively". The other order will make
no sense at all.

-- 
John Cowan           http://www.ccil.org/~cowan              cowan@ccil.org
To say that Bilbo's breath was taken away is no description at all.  There
are no words left to express his staggerment, since Men changed the language
that they learned of elves in the days when all the world was wonderful.
        --_The Hobbit_



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