# US 8,788,430 B2 · Apparatus with electronic information transfer function or the like, program for electronic information transfer, and method for electronic information transfer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,788,430 B2 - Document ID: US8788430B2 - Status: Granted - Kind: B2 - Application number: 11/252,827 - Filed: 2005-10-19 - Published: 2006-05-04 - Granted: 2014-07-22 - Earliest claimed: 2004-10-28 - Assignees: Fujitsu Limited - Applicants: Kenji Ishii - Inventors: Kenji Ishii - Web page: https://patentgrep.com/patent/US8788430B2 ## CPC - H04L 63/045: {wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption (cryptographic mechanisms or cryptographic arrangements using a plurality of keys or algorithms H04L9/14)} - G06F 21/10: Protecting distributed programs or content, e.g. vending or licensing of copyrighted material (protection in video systems or pay television H04N7/16) {; Digital rights management [DRM]} - G06F 21/86: Secure or tamper-resistant housings - G06Q 20/123: {Shopping for digital content} - G06Q 20/1235: {with control of digital rights management [DRM]} - G06Q 20/382: {insuring higher security of transaction} - G06Q 30/06: Buying, selling or leasing transactions - G06F 2221/2143: Clearing memory, e.g. to prevent the data from being stolen - H04L 2463/101: applying security measures for digital rights management - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR ## Abstract An information processor transmits and receives electronic information via a network, and includes an electronic information encrypting unit which encrypts the electronic information. A storage unit stores the electronic information and the encrypted electronic information data encrypted by the electronic information encrypting unit. An electronic credit generating unit generates a letter of credit to erase the electronic information from the storage unit and to transmit the encrypted electronic information data to the other information processor. An electronic information communicating unit transmits and receives the encrypted electronic information data and the electronic letter of credit to and from the other information processor. ## Claims ### Claim 1 An information processing apparatus comprising: a storage configured to store electronic information; and a processor coupled to the storage and configured to: generate an encrypted electronic information by encrypting the electronic information with a public key, which is received from another information processing apparatus, erase the electronic information from the storage, generate an electronic letter of credit which indicates that the electronic information has been erased and the encrypted electronic information has been generated, and transmit the encrypted electronic information and the electronic letter of credit to the another information processing apparatus only after erasing the electronic information from the storage. ### Claim 2 (depends on 1) The information processing apparatus according to claim 1, wherein the electronic letter of credit generated by the processor is given a digital signature of a user transmitting the encrypted electronic information. ### Claim 3 (depends on 1) The information processing apparatus according to claim 1, wherein the electronic letter of credit generated by the processor is given an attribute list of the encrypted electronic information to be transmitted to the another information processing apparatus. ### Claim 4 (depends on 1) The information processing apparatus according to claim 1, wherein the electronic information before encryption is erased after completion of the generating the encrypted electronic information, and the encrypted electronic information is left in the storage until the encrypted electronic information is transmitted by the processor. ### Claim 5 (depends on 1) The information processing apparatus according to claim 1, wherein the electronic information includes contents information indicating an attribute of the electronic information. ### Claim 6 (depends on 1) The information processing apparatus according to claim 1, wherein the processor is configured to auction off the electronic information via networks. ### Claim 7 (depends on 1) The information processing apparatus according to claim 1, wherein the processor is configured to transmit the encrypted electronic information to said another information processing apparatus after receiving a transfer processing continuation message from said another information processing apparatus. ### Claim 8 A storage medium storing a program to be executed, by a computer, execution of the program causing the computer to perform a process comprising: generating an encrypted electronic information by encrypting electronic information with a public key which is received from another information processing apparatus, the electronic information being stored in a storage; erasing the electronic information from the storage; generating an electronic letter of credit which indicates that the electronic information has been erased by the erasing and the encrypted electronic information has been generated by the generating; and transmitting the encrypted electronic information and the electronic letter of credit to the another information processing apparatus only after erasing the electronic information from the storage. ### Claim 9 A contents transfer method enabling transfer of electronic information via networks, comprising: generating an encrypted electronic information by encrypting electronic information with a public key which is received from another information processing apparatus, the electronic information being stored in a storage; erasing the electronic information from the storage; generating an electronic letter of credit which indicates that the electronic information has been erased by the erasing and the encrypted electronic information has been generated by the generating; and transmitting the encrypted electronic information and the electronic letter of credit to the another information processing apparatus only after erasing the electronic information from the storage by the erasing. ### Claim 10 (depends on 9) The contents transfer method according to claim 9, wherein the electronic letter of credit generated by the generating is given a digital signature of a user transmitting the encrypted electronic information. ### Claim 11 (depends on 9) The contents transfer method according to claim 9, wherein the electronic letter of credit generated by the generating is given an attribute list of the encrypted electronic information to be transmitted to the another information processing apparatus. ### Claim 12 (depends on 9) The contents transfer method according to claim 9, wherein the electronic information before encryption is erased after completion of the generating the encrypted electronic information, and the encrypted electronic information is left in the storage until the encrypted electronic information is transmitted by the transmitting. ### Claim 13 (depends on 9) The contents transfer method according to claim 9, wherein the electronic information includes contents information indicating an attribute of the electronic information. ### Claim 14 (depends on 9) The contents transfer method according to claim 9, further comprising: auctioning off the electronic information via networks. ### Claim 15 (depends on 9) The contents transfer method according to claim 9, wherein the transmitting transmits the encrypted electronic information to the another information processing apparatus after receiving a transfer processing continuation message from the another information processing apparatus.