Group parity check system for important information
Hatsukazu Tanaka, Taketoshi Momohara, Seiko Kaneku · Electronics and Communications in Japan (Part I Communications) · 1985
Abstract Can we prevent human deception or computer crime by cryptography? The main functions of cryptography are “secrecy” and “authentification,” and they are certainly effective for those outside a computer system. However, for the professional insiders who want to attempt deception, no cryptosystem will work well even if the information is protected by advanced cryptography because of the dependence on human conscience. Therefore, based on the concept that only humans can check human deception, we propose a new scheme of data security, the “Group parity check system for important information.” This scheme checks human deception arising in information input by mutual surveillance among people related to the information system. Furthermore, we show how to realize this scheme using the public key cryptosystem, and on a microcomputer. Although this scheme is inefficient because it requires duplex input of information, it will be effective if applied to only important information.