American mathematician, electronic engineer and cryptographer, known as the founder of information theory. 1948, Shannon published an epoch-making paper, Mathematical Principles of Communication, which laid the foundation of modern information theory.

Shannon put forward the concept of information entropy, which laid the foundation of information theory and digital communication. The main thesis is the master thesis of 1938, the symbolic analysis of relay and switch circuit, the mathematical principle of communication of 1948, and the communication under noise of 1949.

1949, Shannon published another famous paper "Communication under Noise" in this magazine. In these two papers, Shannon clarified the basic problems of communication, gave the model of communication system, put forward the mathematical expression of information quantity, and solved a series of basic technical problems such as channel capacity, source statistical characteristics, source coding, channel coding and so on.