Authentication system, authentication apparatus, and recording medium

A portable recording medium which a forwarding agent has and is used by an authentication apparatus operable to verify authenticity of a visit by the forwarding agent, the authentication apparatus being provided in a residence of a person who is visited by the forwarding agent, the portable recording medium comprising:

• a storage unit operable to store therein in advance at least one piece of information concerning authenticity of the visit by the forwarding agent;
• a receiving unit operable to receive first data from the authentication apparatus via an input/output apparatus provided at an entrance of the residence;
• a data generating unit operable to generate second data from the first data using the information stored in the storage unit, the second data being used for an authentication process;
• and
• an output unit operable to output the second data to the authentication apparatus via the input/output apparatus.

An authentication method for an authentication apparatus for verifying authenticity of a visit by a forwarding agent using a portable recording medium which the forwarding agent has, the authentication apparatus being provided in a residence of a person who is visited by the forwarding agent,

• the authentication apparatus comprising:
• an information storage unit operable to store therein information used for the verifying of authenticity of the visit by the forwarding agent, and
• the authentication method comprising the step of:
• judging whether or not the visit by the forwarding agent is authentic by, via an input/output apparatus provided at an entrance of the residence, performing an authentication using information stored in the portable recording medium concerning authenticity of the visit by the forwarding agent and using the information stored in the information storage unit.

An authentication program that is run in an authentication apparatus for verifying authenticity of a visit by a forwarding agent using a portable recording medium which the forwarding agent has, the authentication apparatus being provided in a residence of a person who is visited by the forwarding agent,

• the authentication apparatus comprising:
• an information storage unit operable to store therein information used for the verifying of authenticity of the visit by the forwarding agent, and
• the authentication program comprising the step of:
• judging whether or not the visit by the forwarding agent is authentic by, via an input/output apparatus provided at an entrance of the residence, performing an authentication using information stored in the portable recording medium concerning authenticity of the visit by the forwarding agent and using the information stored in the information storage unit.

A computer-readable program recording medium that records therein an authentication program that is run in an authentication apparatus for verifying authenticity of a visit by a forwarding agent using a portable recording medium which the forwarding agent has, the authentication apparatus being provided in a residence of a person who is visited by the forwarding agent,

• the authentication apparatus comprising:
• an information storage unit operable to store therein information used for the verifying of authenticity of the visit by the forwarding agent, and
• the authentication program comprising the step of:
• judging whether or not the visit by the forwarding agent is authentic by, via an input/output apparatus provided at an entrance of the residence, performing an authentication using information stored in the portable recording medium concerning authenticity of the visit by the forwarding agent and using the information stored in the information storage unit.