And even better, the Crosby article on optimizing timing attacks. He gets to the level of measuring differences as small as 15-100 microseconds over the Interne

And even better, the Crosby article on optimizing timing attacks. He gets to the level of measuring differences as small as 15-100 microseconds over the Internet and 100 nanoseconds over the LAN. http://www.cs.rice.edu/~dwallach/pub/crosby-timing2009.pdf http://www.cs.rice.edu/~dwallach/pub/crosby-timing2009.pdf I think there's still more room to improve on this paper by using more sophisticated modeling.