Research of The Hagelin Cryptograph

• 1、School of Traffic and Transportation, Beijing Jiaotong University

Abstract：The rapid development of computer networks draws more and more attention to information security. Cryptography is a both old and young science, in today information ages, a large amount of sensitive information such as court records, private documents, software source code, banking, insurance documents, etc., often exchange through public communication facilities or computer networks, therefore encryption has become an important part to ensure the information security. This paper shows classical cryptography Hagelin in the history, implementation and the main idea, and describes how the Hagelin cryptograph works from the machine principle, the use of encryption and decryption methods, as well as several examples of ways to implement Hagelin, with emphasis on the principles of Hagelin rotor Machine and the encryption and decryption methods. This paper aims to increase the knowledge of Hagelin cryptograph, and make a reference for modern cryptography research both in thoughts and methods.

Keywords： Hagelin cryptograph rotor machine encryption