Re: Randomness, Quantum Mechanics - and Cryptography

2010-09-08 Thread Jerry Leichter
On Sep 6, 2010, at 10:49 PM, John Denker wrote: If you think about the use of randomness in cryptography, what matters isn't really randomness - it's exactly unpredictability. Agreed. This is a very tough to pin down: What's unpredictable to me may be predictable to you, It's easy to

Re: Randomness, Quantum Mechanics - and Cryptography

2010-09-08 Thread Perry E. Metzger
On Tue, 7 Sep 2010 22:22:57 -0400 Jerry Leichter leich...@lrw.com wrote: On Sep 6, 2010, at 10:49 PM, John Denker wrote: It's easy to pin down. If it's unpredictable to the attacker, it's unpredictable enough for all practical purposes. I was talking about mathematical, even philosophical,

Hashing algorithm needed

2010-09-08 Thread flj
Hi. Just subscribed to this list for posting a specific question. I hope the question I'll ask is in place here. We do a web app with an Ajax-based client. Anybody can download the client and open the app, only, the first thing the app does is ask for login. The login doesn't happen using

Re: Randomness, Quantum Mechanics - and Cryptography

2010-09-08 Thread Victor Duchovni
On Tue, Sep 07, 2010 at 10:22:57PM -0400, Jerry Leichter wrote: But there isn't actually such a thing as classical thermodynamical randomness! Classical physics is fully deterministic. Thermodynamics uses a probabilistic model as a way to deal with situations where the necessary

Re: Hashing algorithm needed

2010-09-08 Thread Ben Laurie
On 8 September 2010 16:45, f...@mail.dnttm.ro wrote: Hi. Just subscribed to this list for posting a specific question. I hope the question I'll ask is in place here. We do a web app with an Ajax-based client. Anybody can download the client and open the app, only, the first thing the app

Re: Hashing algorithm needed

2010-09-08 Thread Chris Palmer
f...@mail.dnttm.ro writes: The idea is the following: we don't want to secure the connection, Why not? Using HTTPS is easier than making up some half-baked scheme that won't work anyway. -- http://noncombatant.org/ - The