"Karl J. Runge" <[EMAIL PROTECTED]> writes:
>Now, I'm not saying a 1024 bit RSA key is not "enough". Depends a bit
>on how long you want to keep the information secret. For a few years
>I'd opt for a 1024 bit key. For a few decades I'd probably lean
>toward a somewhat longer key (2048 - 4096?). But who knows what will
>come to pass on that time scale.
For a few decades, I submit you should stay away from public key
cryptosystems entirely.
A new algorithm is hard to predict. Technology is easier - and it is
looking more and more probable that quantum computers will be
developed over the next 20 years or so. One of the few algorithms
they have developed for a quantum computer is one for factoring
integers. Roughly speaking (IIRC), an N qubit quantum computer can
factor an N bit number in N steps. I have read that all known public
key cryptosystems can be broken with a quantum computer.
- Jim Van Zandt
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