Math 1111: Cryptography

An article about a Cisco security upgrade for the cloud and various devices that access the cloud.

An in-depth description of Julius Caesar's shift cipher and how it works. Also shows how to use frequency analysis and chi-square values to quickly break the cipher.

An in depth summary about Mary, Queen of Scots, and the people she encountered.

Clues left in the clumsily encrypted notes of a Mafia don have helped Italian investigators to track his associates and ultimately contributed to his capture after years on the run. The recently busted Bernardo Provenzano, reputed to be the "boss of bosses" of the Sicilian Mafia, used a modified form of the Caesar cipher to obscure "sensitive information" in notes left to either his family or underlings.

Researchers have applied the microdot principle described by Singh on page 6 to hide messages in DNA sequences.

The Babington plot, which was the undoing of Mary, Queen of Scots, was one of several conspiracies against Elizabeth I that were uncovered. The Ridolfi Plot In 1571 a plot was discovered involving Philip II of Spain, Pope Pius V and the Duke of Norfolk, as well as Mary's advisor, the Bishop of Ross, and Mary herself.

A brief look at the science of cryptology and the simple encryptions found in the Old Testament. Has a couple of examples and explains the three main transformations used.

A brief history on Mary, Queen of Scots, and her secret plotting against Queen Elizabeth.

This website has lots of great information on historical ciphers such as the Voynich Cipher and the Dorabella Cipher.

Cryptanalysis and Frequency Analysis