BugTraq
Breaking RSA: Totient indirect factorization Nov 14 2007 09:59PM
gandlf (gandlf gmail com) (3 replies)
Re: Breaking RSA: Totient indirect factorization Nov 15 2007 04:58PM
Clifton Royston (cliftonr lava net) (1 replies)
On Wed, Nov 14, 2007 at 10:59:42PM +0100, gandlf wrote:
..
> Algorithm
> ---------
>
> - Repeat "a = a^n mod m" with n from 2 to m, saving all the results in
> a table until a == 1 (Statement 4).

Do I understand correctly that this step of your proposed algorithm
can identify the private key corresponding to (e.g.) a 1024 bit public
key, but only by doing on the order of Sum(2..2^1024) = ~ 2^1025
modular exponentiations and storing the results? If so, that would
come to approximately 1E307 modular exponentiation operations.

Divide that out by (for example) teraflops and the expected lifetime
of the universe, and I don't think you will get a pleasing result.

-- Clifton

--
Clifton Royston -- cliftonr (at) iandicomputing (dot) com [email concealed] / cliftonr (at) lava (dot) net [email concealed]
President - I and I Computing * http://www.iandicomputing.com/
Custom programming, network design, systems and network consulting services

[ reply ]
Re: Breaking RSA: Totient indirect factorization Nov 15 2007 08:46PM
gandlf (gandlf gmail com) (1 replies)
Re: Breaking RSA: Totient indirect factorization Nov 16 2007 03:33AM
Erick Galinkin (erick galinkin gmail com)
Re: Breaking RSA: Totient indirect factorization Nov 15 2007 08:29AM
Alexander Klimov (alserkli inbox ru)
Re: Breaking RSA: Totient indirect factorization Nov 14 2007 11:40PM
Watson Ladd (watsonbladd gmail com)


 

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