A model of the hierarchical key assignment scheme is approached in this paper, which can be used with any cryptography algorithm. Besides, the optimal dynamic control property of a hierarchical key assignment scheme w...A model of the hierarchical key assignment scheme is approached in this paper, which can be used with any cryptography algorithm. Besides, the optimal dynamic control property of a hierarchical key assignment scheme will be defined in this paper. Also, our scheme model will meet this property.展开更多
伴随“医疗云”的投入使用,电子病历(Electronic Medical Record,EMR)作为病程记录,对个人精准医疗和社会健康调查至关重要。然而,电子病历的存储服务主要由半可信的第三方服务商提供,带来了安全问题和隐私隐患。考虑到电子病历良好的...伴随“医疗云”的投入使用,电子病历(Electronic Medical Record,EMR)作为病程记录,对个人精准医疗和社会健康调查至关重要。然而,电子病历的存储服务主要由半可信的第三方服务商提供,带来了安全问题和隐私隐患。考虑到电子病历良好的分层特性,分层密钥分配方案成为解决电子病历管理问题的有效措施之一。提出了一种支持分层属性划分的电子病历管理方案,结合密钥聚合机制,支持医疗记录的动态添加,实现了对单一多个或整类别下的医疗记录共享功能,为患者提供了便捷的电子病历共享方案。展开更多
In order to solve the problems resulted from dynamic access control in a userhierarchy, a cryptographic key assignment scheme is proposed by Prof. Lin to promote the performingability and to simplify the procedure. Ho...In order to solve the problems resulted from dynamic access control in a userhierarchy, a cryptographic key assignment scheme is proposed by Prof. Lin to promote the performingability and to simplify the procedure. However, it may cause the security in danger as the userchanges his secret key; besides, some secret keys may be disclosed due to the unsuitable selectionof the security classes' identities. Through setting up a one-way hash function onto Lin's scheme,the proposed modification can greatly improve the security of Lin's scheme.展开更多
基金Supported by the National Natural Science Foun-dation of China (70271068)
文摘A model of the hierarchical key assignment scheme is approached in this paper, which can be used with any cryptography algorithm. Besides, the optimal dynamic control property of a hierarchical key assignment scheme will be defined in this paper. Also, our scheme model will meet this property.
文摘伴随“医疗云”的投入使用,电子病历(Electronic Medical Record,EMR)作为病程记录,对个人精准医疗和社会健康调查至关重要。然而,电子病历的存储服务主要由半可信的第三方服务商提供,带来了安全问题和隐私隐患。考虑到电子病历良好的分层特性,分层密钥分配方案成为解决电子病历管理问题的有效措施之一。提出了一种支持分层属性划分的电子病历管理方案,结合密钥聚合机制,支持医疗记录的动态添加,实现了对单一多个或整类别下的医疗记录共享功能,为患者提供了便捷的电子病历共享方案。
文摘In order to solve the problems resulted from dynamic access control in a userhierarchy, a cryptographic key assignment scheme is proposed by Prof. Lin to promote the performingability and to simplify the procedure. However, it may cause the security in danger as the userchanges his secret key; besides, some secret keys may be disclosed due to the unsuitable selectionof the security classes' identities. Through setting up a one-way hash function onto Lin's scheme,the proposed modification can greatly improve the security of Lin's scheme.
