Electronic information backup system
First Claim
1. An IC card comprising:
- electronic wallet unit for management of electronic value information;
electronic wallet storage unit that is the intrinsic storage area of the electronic wallet unit;
electronic information registration unit registering said electronic value information to an electronic safe unit connected through a network and acquiring a registration certificate from the electronic safe unit;
electronic information recovery unit for acquiring said electronic value information by presenting said registration certificate to said electronic safe unit;
electronic information dividing unit for dividing said electronic value information to the desired number of partial electronic information pieces to which an identifier for recovering said electronic value information to the original electronic value information is respectively added; and
an electronic information combining unit for recovering said electronic value information from said divided electronic information pieces,a key storage unit for storing a set of an encryption key for encrypting said electronic value information and a decoding key for decoding the encrypted electronic value information; and
an encrypting/decoding unit for executing the encryption of said electronic value information using the encryption key and also executing the decoding using said decoding key,wherein said electronic registration unit acquires a plurality of partial electronic information pieces by requesting division of said electronic value information to said electronic information dividing unit and also acquires respective partial information registration certificates by registering the entire part or a part of said partial electronic information to the electronic safe unit,said electronic information recovery unit acquires respective corresponding partial electronic information pieces by presenting the entire part or a part of said partial information registration certificates to the electronic safe unit that has issued the respective partial information registration certificates, andsaid electronic information combining unit recovers said electronic value information from said obtained partial electronic information pieces.
2 Assignments
0 Petitions
Accused Products
Abstract
An electronic information backup system for safely back up electronic value information about electronic money and electronic ticket through communication in a server so as to exclude unauthorized actions when backup and restoring are performed and for restoring the electronic value information from the backup in case of emergency such as loss of key information. In this system, electronic value information is encrypted, the encrypted electronic value information is registered in an electronic safe server, and the user receives the registration, presents the registration to the server to receive the encrypted electronic value information, and decrypts the electronic value information with decrypting key data. The decrypting key can be kept in another server. The electronic value information and the decrypting key can be kept separately in different servers. It is possible to keep the sequence of number of the cryptogram to serve as the basic the decrypting key in the server, and to generate a decrypting key according to a decrypting key generation algorithm on the terminal side. In case of loss of the decrypting key, the possessor certificate information is verified and then the user can receive the decrypting key from the server.
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Citations
21 Claims
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1. An IC card comprising:
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electronic wallet unit for management of electronic value information; electronic wallet storage unit that is the intrinsic storage area of the electronic wallet unit; electronic information registration unit registering said electronic value information to an electronic safe unit connected through a network and acquiring a registration certificate from the electronic safe unit; electronic information recovery unit for acquiring said electronic value information by presenting said registration certificate to said electronic safe unit; electronic information dividing unit for dividing said electronic value information to the desired number of partial electronic information pieces to which an identifier for recovering said electronic value information to the original electronic value information is respectively added; and an electronic information combining unit for recovering said electronic value information from said divided electronic information pieces, a key storage unit for storing a set of an encryption key for encrypting said electronic value information and a decoding key for decoding the encrypted electronic value information; and an encrypting/decoding unit for executing the encryption of said electronic value information using the encryption key and also executing the decoding using said decoding key, wherein said electronic registration unit acquires a plurality of partial electronic information pieces by requesting division of said electronic value information to said electronic information dividing unit and also acquires respective partial information registration certificates by registering the entire part or a part of said partial electronic information to the electronic safe unit, said electronic information recovery unit acquires respective corresponding partial electronic information pieces by presenting the entire part or a part of said partial information registration certificates to the electronic safe unit that has issued the respective partial information registration certificates, and said electronic information combining unit recovers said electronic value information from said obtained partial electronic information pieces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification