Re: Crypto Mini-FAQ

jsavard_at_ecn.ab.ca
Date: 04/30/03 

Date: Wed, 30 Apr 2003 08:36:55 GMT

Roger Schlafly (rogersc@mindspring.com) wrote:
: We seem to have a terminology hangup. I'd say that a stream cipher is
: a one-time pad with the key stream simulated by a PRNG.

That is true enough, in a manner of speaking. But in general, the term
"one-time pad" is not mentioned around stream ciphers, except by snake-oil
salesmen.

: Not much, except that quantum cryptography needs a quantum
: computer in every repeater and router.

A good point, although one _can_ do quantum cryptography right now -
without repeaters and routers.

: I don't see much difference. Cold fusion and quantum computing are both
: just ideas.

Astrology, phrenology, palm reading, and flying saucers are just ideas
*too*. Trust me: comparing quantum computing to cold fusion will appear as
an insult to a great many serious scientific researchers doing real work,
even if it is at the frontiers of research.

John Savard

Relevant Pages

  • Re: Crypto Mini-FAQ
    ... > a one-time pad with the key stream simulated by a PRNG. ... characteristic of a stream cipher is that as each elementary ... except that quantum cryptography needs a quantum ... Quantum computing, on the other hand, is not only supported ...
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  • Re: Authentication
    ... I would just say that you are using a stream cipher. ... I understand your point but X = P xor Z is indeed the way how a one-time pad ... not all rarely used ciphers suffer from serious limitations. ... Compared to block ciphers, I would say the work on stream cipher is much ...
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  • Re: post-doomsday computing
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  • Re: "We dont even know whether QC is consistent with QM"
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  • Re: Crypto Mini-FAQ
    ... > We seem to have a terminology hangup. ... > a one-time pad with the key stream simulated by a PRNG. ... If you tried selling a stream cipher as a one-time pad to ...
    (sci.crypt)