Tag Archives: Caesar Cipher

Quantum key distribution scheme BB84 The small quantum cryptography quiltlet, attached to the large Cryptoquilt, illustrates the quantum key distribution scheme BB84, which was the first quantum cryptography protocol. The Brassard-Bennett 84 protocol was first published in a 1984 conference; here is a copy of that first paper.  In this scheme, two parties have toContinue reading “Quiltlet – Mathematical Connections”

Cryptography or “secret writing” is an old concept. For several millenia at least, people have wanted to communicate messages to distant others in such a way that even if the message was intercepted, it would not be readable by the interceptors. To achieve this, they have used different forms of “encoding” information; would-be interceptors inventedContinue reading “Cryptography Quilt – Mathematical Connections”