2048-bit RSA keys

2010-08-15 Thread Paul Hoffman
At 9:34 AM -0700 8/15/10, Ray Dillinger wrote: >I'm under the impression that <2048 keys are now insecure mostly due >to advances in factoring algorithms that make the attack and the >encryption effort closer to, but by no means identical to, scaling >with the same function of key length. You are

Re: "Cars hacked through wireless tire sensors" Another paper plus USENIX SEC10 proceedings

2010-08-15 Thread David G. Koontz
What looks like to be an applicable paper. Not the same set of authors as the earlier reference to USENIX. Experimental Security Analysis of a Modern Automobile Karl Koscher, Alexei Czeskis, Franziska Roesner, Shwetak Patel, and Tadayoshi Kohno Department of Computer Science and Engineering Unive

Re: non 2048-bit keys

2010-08-15 Thread Samuel Neves
If an attacker creating a special-purpose machine to break your keys is a realistic scenario, why are you even considering keys of that size? Best regards, Samuel Neves On 15-08-2010 04:25, John Gilmore wrote: >>> ... 2048-bit keys performing >>> at 1/9th of

RE: Has there been a change in US banking regulations recently?

2010-08-15 Thread Peter Gutmann
Ray Dillinger writes: >On Fri, 2010-08-13 at 14:55 -0500, eric.lengve...@wellsfargo.com wrote: > >> The big drawback is that those who want to follow NIST's recommendations >> to migrate to 2048-bit keys will be returning to the 2005-era overhead. >> Either way, that's back in line with the above

RE: Has there been a change in US banking regulations recently?

2010-08-15 Thread Ray Dillinger
On Fri, 2010-08-13 at 14:55 -0500, eric.lengve...@wellsfargo.com wrote: > Moore's law helped immensely here. In the last 5 years systems have gotten > about 8 times faster, reducing the processing cost of crypto a lot. > The big drawback is that those who want to follow NIST's recommendations

Re: non 2048-bit keys

2010-08-15 Thread John Gilmore
>> ... 2048-bit keys performing >> at 1/9th of 1024-bit. My own internal benchmarks have been closer to >> 1/7th to 1/8th. Either way, that's back in line with the above stated >> 90-95% overhead. Meaning, in Dan's words "2048 ain't happening." Can I abuse a ph