RSA 1024 ridiculous

Remco Post at
Sat Jun 16 15:49:35 CEST 2007

Snoken wrote:
> Hi,
> I just read the latest CRYPTO-GRAM, June 15, 2007, by Bruce Schneier.
> He writes:
> "We have a new factoring record:  307 digits (1023 bits).  It's a
> special number -- 2^1039 - 1 -- but the techniques can be
> generalized.  Expect regular 1024-bit numbers to be factored soon.  I
> hope RSA application users would have moved away from 1024-bit
> security years ago, but for those who haven't yet: wake up.
> "
> I suppose this means that 1024 bit RSA-keys are ridiculous and the
> Open PGP Card is a joke. And what about all web sites protected by
> SSL with a 1024-bit RSA-certificate?

As I read the article, last time it took 9 years to generalize the
method used for the special number to any number. Now, my key is valid
for one year, and I expect messages protected by that key to be a secret
for maybe a year longer, that means that at the current rate I'll be
able to use my card for at least 5 more years end maybe longer.

And then still, it takes 11 months on a huge cluster of computers to
factor out my key, or to compare, all of the compute power available in
this country for a substantial amount of time.

I guess you're right, if the nsa is after you, you need stronger keys.
If it's just anybody else, I'd say you'll be safe for a few more years.
Your ssl certificates will have expired by that time, and maybe a 2048
bit openpgp card will be available (at a reasonable prise).

> Snoken

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Remco Post

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