Get flash to fully experience Pearltrees by Gilles Brassard
Département IRO, Université de Montréal. The idea that a vote
cast by a person remains the same after he submitted it is taken
very seriously in any democracy. Voting is the right of the
citizen, and it's how we choose the people who make important
decisions on our behalf. When the security of the ballot is
compromised, so, too, is the individual's right to choose his
leaders. Privacy is paramount when communicating sensitive
information, and humans have invented some unusual ways to
encode their conversations. In World War II , for example, the
Nazis created a bulky machine called the Enigma that resembles a
typewriter on steroids. This machine created one of the most
difficult ciphers (encoded messages) of the pre-computer age.
Even after Polish resistance fighters made knockoffs of the
machines -- complete with instructions on how the Enigma worked
-- decoding messages was still a constant struggle for the
Allies [source: Cambridge University ]. A