[cryptography] philosophical question about strengths and attacks at impossible levels

Morlock Elloi morlockelloi at yahoo.com
Fri Oct 15 00:36:18 EDT 2010


It's because cryptographers don't really have more imagination than, say, TV screen OEMs: bigger is better, simply because they don't know to do anything else. It doesn't matter that there is no bandwidth to fill that screen, that there is really no content worth watching, that the effective angular size of pixel is getting bigger ... they keep making 'em bigger.

Adding few bits of effective key length to 100+ bit key will get your paper published. Is it easy? No. Does it matter? It doesn't.

> What if a hash has 512-bit collision-resistance? What would
> that mean?
> That an attacker might spend about 2^512 resources to find
> 


      



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