KEY SHARING MANAGER DEVICE, KEY SHARING MEMBER DEVICE, AND PROGRAMS THEREOF

To provide a key sharing manager device capable of managing a group by assigning specific authority to a manager of the group sharing a key.SOLUTION: A key sharing manager device 1 includes: signature verification key generation means 11 for generating a signature key and a verification key for an e...

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Bibliographische Detailangaben
Hauptverfasser: OTAKE TAKESHI, KAJITA KAISEI, EMURA KEITA, OGAWA KAZUTO, NOJIMA MAKOTO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a key sharing manager device capable of managing a group by assigning specific authority to a manager of the group sharing a key.SOLUTION: A key sharing manager device 1 includes: signature verification key generation means 11 for generating a signature key and a verification key for an electronic signature; encryption key generation means 12 for generating private keys and public keys in association with identifiers of a manager and a plurality of members; encryption key distribution means 14 for distributing a member's private key in response to a request from a member whose identifier matches; group generation means 150 for generating a message to notify all the members of the manager's public key and the members' public key; and signature addition means 16 for generating a signature for the message using the signature key, adding the signature to the message, and transmitting the signed message to all the members.SELECTED DRAWING: Figure 2 【課題】鍵を共有するグループのマネジャに特定の権限を付与してグループを管理することが可能な鍵共有マネジャ装置を提供する。【解決手段】鍵共有マネジャ装置1は、電子署名用の署名鍵と検証鍵とを生成する署名検証鍵生成手段11と、マネジャおよび複数のメンバの識別子に対応付けて秘密鍵と公開鍵とを生成する暗号鍵生成手段12と、メンバの秘密鍵を、識別子が一致するメンバからの要求に対して配信する暗号鍵配信手段14と、マネジャの公開鍵およびメンバの公開鍵をメンバ全体に通知するメッセージを生成するグループ生成手段150と、署名鍵を用いて、メッセージに対する署名を生成してメッセージに付加し、署名付きメッセージをメンバ全体に送信する署名付加手段16と、を備える。【選択図】図2