Robert Morris Sr. (the father of Robert Morris Jr. who made the 'internet worm' back in late 1988), ex. lead scientist of the NSA, is speaking at a seminar in Cambridge this Tuesday entitled "The cryptographic role of the cleaning lady". You can get more info here I am definitely going. :) Update: The Morris seminar at Cambridge was quite interesting, but mostly from a 'historical' point of view. Nothing much on the 'cleaning lady' apart from a few (some well-known) stories here and there. Nothing much on anything really. A bit disappointed in that respect. But it was a nice trip out of London.