how slow are 4Kbit RSA keys? [was: Re: multiple keys vs multiple identities]
dshaw at jabberwocky.com
Mon Sep 27 15:57:18 CEST 2010
On Sep 24, 2010, at 4:29 PM, Daniel Kahn Gillmor wrote:
> Are there other interpretations of the above results? does anyone else
> want to post comparable data points on different hardware? How powerful
> is a typical smartphone anyway? What kind of a cutoff are people
> willing to accept in terms of CPU cycles per signature validated? or am
> i measuring the wrong thing entirely?
Sort of, yes. You are measuring verify performance. At it happens, that is the operation that RSA really excels at, CPU-wise. Try measuring signing or decryption performance instead. People on smartphones don't just verify signatures :)
"Dreadfully" is a difficult thing to enumerate anyway. For me, FWIW, it would be "over 1-2 seconds".
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