Recommended key size for life long key

Doug Barton dougb at
Mon Sep 9 10:27:58 CEST 2013

On 09/09/2013 12:49 AM, Robert J. Hansen wrote:
> On 9/8/2013 6:25 PM, Doug Barton wrote:
>> he seems to have studiously ignored all of the facts that point to
>> why what he's trying to do is a bad idea.
> Nitpick: I think what he's trying to do (make credible, accurate
> long-term projections) is a good idea.  I just think he's going about it
> in a way that will not give credible or accurate answers, and that as a
> result his write-up is rubbish.

I was (sort of) trying to be kind, and I think I made the point at least 
obliquely in context; but I'm not sure that someone who doesn't seem to 
understand cryptography trying to make long term projections that people 
who DO understand it won't make actually IS a good idea. :)

If what you meant was, "It's important for knowledgeable people to 
examine how long various key sizes can be expected to remain secure" 
then we're in agreement of course. But the blind leading the blind is 
never a good idea, and particularly dangerous where complex topics like 
crypto are concerned.


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