PORTABLE INFORMATION DEVICE, PERSONAL IDENTIFICATION SYSTEM, AND IDENTIFICATION DATA ERASING METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem that the danger of a decrease in convenience due to the complexity of a managing means, a deficiency in the storage capacity of an information device and a leak of identification information expands since plural pieces of identification data are stored in one personal portable information device as use fields of an individual identification system are diversified. SOLUTION: This system is provided with a means which stores conditions of the erasure of identification data as condition data and a means which optionally erases the identification data by using the condition data.