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KEY EXCHANGE DEVICE, KEY GENERATION DEVICE, KEY EXCHANGE SYSTEM, KEY EXCHANGE METHOD, AND PROGRAM
KEY EXCHANGE DEVICE, KEY GENERATION DEVICE, KEY EXCHANGE SYSTEM, KEY EXCHANGE METHOD, AND PROGRAM
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机译:密钥交换设备,密钥生成设备,密钥交换系统,密钥交换方法和程序
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摘要
PROBLEM TO BE SOLVED: To provide a key exchange system that can designate an access policy in exchanging a key and handle any attribute even after generating a master secret key and master public key.;SOLUTION: A key exchange system of the invention comprising at least a key exchange device α and key exchange device β exchanges a session key. When generating a long-term secret key by utilizing a linear secret distribution method in the key exchange system of the invention, a key generation device issues the long-term secret key S'A, {TA}, and {SA} as shared information of the linear secret distribution method based on an attribute set SA of the key exchange device α. The key exchange system designates an access policy of a partner in exchanging a key by allocating an access structure AA of linear secret distribution as the access policy in exchanging the key. A master secret key g^z and master public key (g, g^r, gT^z) which are independent of the attribute set are used in the invention.;COPYRIGHT: (C)2012,JPO&INPIT
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机译:解决的问题:提供一种即使在生成主密钥和主公钥之后,也可以在交换密钥时指定访问策略并处理任何属性的密钥交换系统。解决方案:本发明的密钥交换系统至少包括密钥交换设备α和密钥交换设备β交换会话密钥。当在本发明的密钥交换系统中利用线性秘密分配方法来产生长期秘密密钥时,密钥产生设备发布长期秘密密钥S' A Sub>,{T A Sub>}和{S A Sub>}作为基于密钥交换设备α的属性集S A Sub>的线性秘密分配方法的共享信息。 。密钥交换系统通过分配线性秘密分布的访问结构A A Sub>作为交换密钥的访问策略,来指定交换密钥的伙伴的访问策略。本发明使用独立于属性集的主秘密密钥g ^ z和主公开密钥(g,g ^ r,g T Sub> ^ z)。版权所有:(C)2012 ,JPO&INPIT
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