Patent ID: 7150039

Claim:
An information processing system with a portable electronic device including means for processing information and a memory employed by a plurality of business organizations, said system comprising: a plurality of access apparatuses, wherein each of said plurality of business organizations is associated with at least one of said plurality of access apparatuses, wherein each of said plurality of access apparatuses are operable to access said portable electronic device, each of said plurality of access apparatuses including means for executing an authentication between an associated business organization and said portable electronic device by using access key information, and each of said plurality of access apparatuses including means for transmitting file registry information to said portable electronic device; and a management sector including means for generating said file registry information and said access key information based on file key information and issuer key information processed by said management sector, wherein said management sector is adapted to create said file registry information at least partly by encrypting memory space specifying information to at least partly produce an encrypted result, wherein said file registry information includes said memory space specifying information in an unencrypted condition and the encrypted result, and wherein said management sector is adapted to create said access key information for each of the business organizations by encrypting based on said file key information and said issuer key information, wherein said file key information is assigned to said associated business organization.