"If there was a way to efficiently cycle through DH parameters, an active man-in-the-middle attacker could spoof the fingerprint."
Isn't this a rather big if? In my limited understanding of the math involved, the whole reason dhe is still secure is because this isn't the case. Which means an attacker couldn't just use any old sha1 collision, it would have to corellate to a valid set of dh params, which would have an effect on the computational complexity, right?
Isn't this a rather big if? In my limited understanding of the math involved, the whole reason dhe is still secure is because this isn't the case. Which means an attacker couldn't just use any old sha1 collision, it would have to corellate to a valid set of dh params, which would have an effect on the computational complexity, right?