Abstract: In remotely coupling one terminal apparatus to a server apparatus, if an authentication processing of a user of one terminal apparatus has been already completed, the user can switch one terminal apparatus to another without an additional authentication processing. Authenticated information indicating that the authentication of the user has already been successfully completed is transferred to another terminal apparatus by coordinating the authenticated information between more than one terminal apparatuses. Another terminal apparatus receives a service from the server apparatus using the authenticated information. Upon coordinating the authenticated information among more than one terminal apparatuses, another terminal apparatus to receive the authenticated information may be authenticated. A storage medium which conducts the authentication may be coupled to a terminal apparatus to be authenticated.

Abstract: An IC card includes: a common key set upon issuance of a card by an IC card issuer; a public key certificate of a parent IC card issued by an authentication station; a signed public key which has been signed by using the parent IC card secret key; a key storage unit which stores the secret key; a data transmission/reception unit which receives at least the public key certificate and the signed public key from the parent IC card; an encryption calculation unit which decodes encrypted user biometric information received from the parent IC card; and a biometric information storage unit which stores first biometric information which has been decoded. The use of the IC card is limited depending on whether biometric information is correct.

Abstract: In remotely coupling one terminal apparatus to a server apparatus, if an authentication processing of a user of one terminal apparatus has been already completed, the user can switch one terminal apparatus to another without an additional authentication processing. Authenticated information indicating that the authentication of the user has already been successfully completed is transferred to another terminal apparatus by coordinating the authenticated information between more than one terminal apparatuses. Another terminal apparatus receives a service from the server apparatus using the authenticated information. Upon coordinating the authenticated information among more than one terminal apparatuses, another terminal apparatus to receive the authenticated information may be authenticated. A storage medium which conducts the authentication may be coupled to a terminal apparatus to be authenticated.