On: Airbus crypto challenge write-up

[tptacek]

This is a good writeup. If you're interested: the e=3 broadcast attack rounds out set 5 of our (unrelated) crypto challenges:

http://cryptopals.com/sets/5/

The e=3 broadcast attack is pretty unrealistic (I'm not sure we ever had to actually exploit it), but the stuff in set 6 comes up all the time, and breaks non-textbook realistic RSA.

I don't know why e=3 broadcast is so popular in entry-level crypto challenges, but this attack is also a CTF favorite.

[baby → tptacek]

ummm, I read up somewhere that e=3 used to be used quite a lot to speed up computations.

[tptacek → baby]

e=3 isn't itself a vulnerability. Read the writeup more carefully. :)