[vox-tech] Linux's Vulnerability to E-mail Viruses

[Rod Roark]

Interesting, I never thought about that before.  The "locking"=20
(and corresponding unlocking) could easily be done by xor'ing=20
against some string of pseudo-random characters that only=20
the encryptor knows how to produce.

-- Rod
   http://www.sunsetsystems.com/

On Thursday 25 April 2002 07:13 pm, Peter Jay Salzman wrote:
> begin Chris McKenzie <cjmckenzie@ucdavis.edu>
>
> > Sure, I wasn't trying to intend a pun, I just mispelled.
> >
> > Modern encryption, assymetric processes.
> >
> > Alright, say I had a very rare piece of software, OpenStep 4.2/i386 a=
nd I
> > wanted to send it to you.  However, you live in some remote jungle wh=
ere
> > you can't copy a key.  But I don't want the item to be stolen along t=
he
> > way.  So I put a lock on the box and send it to you.  You can't open =
that
> > lock so in a ridiculous notion, you put another lock on it, one that =
you
> > have the key for and send the doubly locked box back to me.  I unlock=
 my
> > lock but the box is still locked by you.  I send it back, and you unl=
ock
> > your lock and have the software.
>
> hi chris,
>
> cool post.
>
> this isn't how modern crypto systems work, is it?   this assumes that
> the "locks" commute.   that for a given message A, a chris lock C and
> peter lock P:
>
> chris CA --> peter PCA --> chris C^(-1)PCA --> peter P^(-1)C^(-1)PCA
>
> but i can't actually unlock the software unless
>
> P^(-1)C^(-1) =3D C^(-1)P^(-1)
>
> i don't know much about modern crypto systems other than RSA type
> things.  is this how they work?  or am i reading too much into an
> analogy?
>
>
> also, i could be totally way off base here, but i think you and mike
> were talking about different types of "processes".  i'm pretty sure mik=
e
> is familiar with reversible processes.  i'm guessing he thought you mea=
nt
> something that goes into a process table.   (?)
>
> pete
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