On Thu, Jan 21, 2010 at 3:08 PM, Paul Wouters <p...@xelerance.com> wrote:
> On Thu, 21 Jan 2010, Eric Rescorla wrote:
>
>>> Also, consider this paper from July 2009:
>>>
>>> https://documents.epfl.ch/users/l/le/lenstra/public/papers/ecdl.pdf
>>>
>>>    Next considering special purpose hardware, the most optimistic
>>>    approach suggests that sieving for a 1024-bit RSA modulus can be
>>>    done in a year for about US $10,000,000, plus a one-time development
>>>    cost of about US $20,000,000,
>>
>>
>> And if your attacker has a budget of $1,000,000? Or $100,000,000?
>>
>> The point is that the numbers depend on your model of the attacker
>> more than on the cryptography.
>
> The full paper has a cost matrix. Though I just noticed they changed the
> URL of the paper :(

Yes, but my point is that the safety period depends on your assumptions
about the attacker's resources, which is why this is not really a technical
issue.

-Ekr
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