Patent ID: 8056137

Claim:
A communication terminal device, comprising: an integrity measurement request unit to generate a command to request another computer device located externally to the terminal device to determine whether a configuration of the another computer device is in accordance with a predetermined condition specifying that the another computer device is free of malicious software and hardware that steals a user's inputted information or destroys data; a cryptographic processing unit to perform cryptographic processing concerning communication with the another computer device; a pointing unit to operate as a pointing device of the another computer device upon determination that the predetermined condition is satisfied, the another computer device providing visual indication, upon operation of the pointing device, that the predetermined condition is satisfied, the visual indication undetectable by malicious software and hardware; and a secret information editing unit to edit secret information, wherein the secret information is only known to a user of the communication terminal and specified and edited by the user of the communication terminal device, wherein the secret information is classified into one of two types: one is used when a verification result of integrity satisfies the predetermined condition, and the other is used when the verification result of integrity does not satisfy the same.