[cryptography] Gregory Perry's follow-up to the FBI OpenBSD / OCF backdoors thread
hanche at math.ntnu.no
Sat Jan 14 08:51:46 EST 2012
[Alfonso De Gregorio <adg at crypto.lo.gy> (2012-01-14 11:38:52 UTC)]
> Back in December 2010, we discussed the OpenBSD IPSec backdoor allegations.
> Two days ago, Cryptome.org published the Gregory Perry's follow-up to
> the this story.
> FBI OpenBSD Backdoors and RSA Cipher Vulnerability
Maybe it's just me, but I find myself unable to make sense of this part:
[...] one mathematical vulnerability in the RSA encryption algorithm
related to changing the base numbering system of the resulting RSA
modulus after a block of plaintext had been encrypted
If "changing the base numbering system" means to express the modulus
in a different base, I utterly fail to see the security implications.
Does it mean something else entirely?
Also, the grammar seems to imply that it is the encryption of a block
of plaintext that results in an RSA modulus. Which seems rather
backward to me.
Not being a crypto expert myself, just a mathematician with a modest
amount of knowledge of matters cryptographical, I don't know if I am
just being obtuse, or if the quoted sentence really is nonsense.
More information about the cryptography