17 Dec
2003
17 Dec
'03
11:17 p.m.
Simon Spero writes:
On the subject of reused one-time-pads: What are the attacks that become available if a pad is used two times. The ones I can think of are:
I will point out that the NSA's VENONA project, which among other things lead indirectly to the execution of the Rosenbergs, got its only break from the two time use of one time pads by the Soviet spies. I can't guess all the techniques they used, but obviously there are enough things you can do to make it dangerous. Perry