Patent ID: 7081806

Claim:
A key information issuing device issuing key information to a key information retaining device, comprising: an authentication module authenticating an issuer of the key information; an output module outputting the key information to said key information retaining device; a recording module recording a mapping of the issued key information to information of said key information retaining device; a receiving module receiving wireless signals from said key information retaining device; and a decoding module decoding the information contained in the wireless signals and encrypted with the key information; wherein the key information is issued in response to an indication of the authenticated issuer; wherein said key information retaining device is a wireless operation device wirelessly connected to an information device and includes a key information input module inputting the key information in contact with said key information issuing device, wherein said output module includes a contact module outputting the key information in contact with said key information input module, and wherein the key information outputted to said key information retaining device is less likely to be intercepted than the information contained in the wireless signal received from said key information retaining device.