Harpo Marx, one of the towering greats of Vaudeville. "He was well known by his trademarks: he played the harp; he never talked during performances, although he often blew a horn or whistled to communicate... more inside

Wireless Amber Alerts ratchets up the fear. Everywhere you go, every stranger you see; beware! If you don't recognize the person, they have abducted a child. Maybe... your child!

Bruce is the author of the classic "Applied Cryptography" and the equally amazing primer on security "Beyond Fear." He's an impressive speaker and one of the world leaders in the science of cryptography.... more inside