Internet Shopping System using Cryptographic ID Technology and ID Compression Methods

Internet shoppers have become widespread comprising 89.1 % of all Internet users in Japan. Moreover, the leakage of personal information from shopping service providers causes a social problem, and requirements for personal information protection are increasing these days. An Internet shopping system is proposed to prevent leaking personal information such as name, home address, age, or gender using cryptographic ID technology. We also propose ID compression methods that minimize the total data size of information used for Internet shopping