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Although it doesn't directly deal with online privacy, I thought this was really cool. It is a new form of encryption involving sending a beam of two photons with only one of them acting as a "key." It could very well be the new method of securing privacy.

Very interesting article that begins with the story of Mary, Queen of Scots, and continues to speak about different techniques of encryption that are harder and harder to break. It also deals with the fact that Mary's messages were being intercepted and the article speaks about secure encryption using photons where you would know if your message was intercepted.

What is Visual Cryptography Visual Cryptography is a special encryption technique to hide information in images in such a way that it can be decrypted by the human vision if the correct key image is used. The technique was proposed by Naor and Shamir in 1994. Visual Cryptography uses two transparent images.