抄録
A new personal identification system is proposed by using the Random Input Password (RIP). This ID system does not require any specific codes to memorize, thus has a potential to flee us from the flood of increasing number of passwords. This RIP is a random string made by individual person by hitting one of the four contact keys by L times. Thus the RIP is different every time. However, the RIP carries peculiarities of individuals and this feature is the essence of this system to propose. At the registration stage, each person register the RIPs by N times consecutively. The identifier is constructed from the registered N RIPs, by averaging each element of 8 parameters. Those 8 parameters, P1, P2, P3, T1, T2, T3, DF, RD, are selected in order to depict characteristics of individuals sufficient to distinguish a specific person from the set of all. The average accuracy evaluated by using 9 individuals was that the Type-I error rate is 23% and Type-II error rate is 19% on the average.
