AUTHENTICATION IN UBIQUITOUS ENVIRONMENT

摘要

A method of registering a person as an authorized user of a portable device includes acquiring biometric data or a combination of pieces of biometric data of a person, encrypting the acquired biometric data or the combination of pieces of biometric data of the person, generating a code from the encrypted biometric data or the combination of pieces of biometric data of the person, inserting the code in an extension field of a public key certificate stored in the portable device, generating a private key and a public key that corresponds to the private key, based on the public key certificate, wherein the private key contains the code, transmitting the public key to a remote entity that is in communication with the portable device, thereby enabling the remote entity to register the person as an authorized user of the portable device, and modifying the public key to generate a modified public key configured to be used in case that the remote entity is disconnected from a service providing server.