Hilariously this is how the encryption on the ps3 was broken.
In December 2010, a group calling itself fail0verflow announced recovery of the ECDSA private key used by Sony to sign software for the PlayStation 3 game console. However, this attack only worked because Sony did not properly implement the algorithm, because k was static instead of random. As pointed out in the signal generation algorithm, this makes d_A solvable and the entire algorithm useless.[4]
http://en.wikipedia.org/wiki/Elliptic_Curve_DSA#SecurityThey always used a k value of 4, instead of it being random.