Iran GPS Spoofing and the RSA Cipher

Ben Liddicott ben at
Fri Dec 23 09:28:24 GMT 2011

That's true of any block cypher in CTR mode.

-----Original Message----- 
From: Brian Gladman 
Sent: Friday, December 23, 2011 8:03 AM 

I am NOT going to argue that this is the reason for using an RSA based 
keystream generator in this particular application but one potential 
advantage of such generators (see, for example, the Blum-Blum-Shub (BBS) 
generator) is that the n'th bit in the keystream can be calculated without 
having to run the generator up to this point.

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