Re: 128bit RSA public key - time to break?
From: Peter Fairbrother (zenadsl6186@zen.co.uk)
Date: 02/23/03
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Date: Sun, 23 Feb 2003 16:07:20 +0000 From: Peter Fairbrother <zenadsl6186@zen.co.uk>
Shane Hird wrote
> Yep.. The key will be used as an identifier as well, which has already been
> fixed to 128 bits. For backwards compatibility it would be good to use those
> same bits for the public key.
>
> I'm trying to add digital signatures to file requests in a p2p application
> to assist in a credit system. Currently the protocol uses no authentication
> at all, just trusts the ID that is sent to it.
>
> It wont be true PKI, but just enough authentication that you will know if
> its the same person you encountered earliar or not.
How is the key generated? How is the key shared? What is it normally used
for?
It might be easier to use it (or perhaps a hash of it) as a MAC key.
But we don't have enough details to know the answer.
-- Peter Fairbrother
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