Patent ID: 6087963
Filing Date: 2000-07-11
Classification: G07B,G08G

Abstract:
A vehicle-mounted device having at least a function to communicate with a road-side device for meeting a utilization charge in an automatic charge collecting system while a vehicle travels on a utilization charge road, said vehicle-mounted device comprising:a discrimination information memory for holding discrimination information for uniquely identifying at least one of said vehicle-mounted device and a user;a discrimination information provider for providing said discrimination information from said discrimination information memory to said road-side device;an encrypting/decrypting key memory for holding at least one encrypting/decrypting key;an encryptor for encrypting information sent to said road-side device using said at least one encrypting/decrypting key; anda decryptor for decrypting encrypted information from said road-side device using said at least one encrypting/decrypting key;wherein said vehicle-mounted device communicates said discrimination information to said road-side device without being encrypted by said encryptor;further comprising a selector arrangement for selectably controlling so as to allow communications to be handled within said vehicle-mounted device with or without encrypting/decrypting.