CONTENT PROVISION APPARATUS AND CONTENT PROVISION METHOD

• Main Author: NAKANO KATSUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 27.07.2017
• Subjects: ADVERTISING; CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PROBLEM TO BE SOLVED: To safely transmit content through a remote access (RA) via an external network such as a Wide Area Network (WAN) while exceeding a limit of Round Trip Time (RTT) or Time To Live (TTL), that is the number of hops.SOLUTION: In Remote Access Authentication and Key Exchange (RA-AKE), limitations on RTT and TTL are removed to realize sharing of a key for remote access between an RA-Source and an RA-Sink. In an authentication sequence, advance registration of the RA-Sink, restrictions on the number of use and restrictions on the number of the keys to be supplied are imposed to restrict the remote access from an unspecified number of users. In the RA-Source, remote access output is prohibited unless content contains information that the remote access output is available.SELECTED DRAWING: Figure 7 【課題】往復遅延時間（ＲＴＴ）やホップ回数ＴＴＬ）の制限を超えつつ、ＷＡＮなどの外部ネットワークを経由したリモート・アクセス（ＲＡ）を通じてコンテンツを安全に伝送する。【解決手段】ＲＡ−ＡＫＥ（鍵交換）ではＲＴＴ並びにＴＴＬの制限を外し、ＲＡ−ＳｏｕｒｃｅとＲＡ−Ｓｉｎｋ間でリモート・アクセス用の鍵共有を実行する。但し、認証シーケンスにおいて、ＲＡ−Ｓｉｎｋの事前登録、利用数制限、鍵供給数制限を課して、不特定多数のユーザーからのリモート・アクセスを制限する。また、ＲＡ−Ｓｏｕｒｃｅは、コンテンツが「リモート・アクセス出力可能」という情報を伴わない限り、リモート・アクセス出力を行なわないようする。【選択図】図７