随着医学技术的进步和大数据时代的到来,在数据发布时如何对患者就诊记录中的敏感信息进行隐私保护成为当前的研究热点。针对医疗大数据在发布过程中隐私保护问题,提出了基于属性效用值排序法AUR-Tree(attribute utility value ranking-...随着医学技术的进步和大数据时代的到来,在数据发布时如何对患者就诊记录中的敏感信息进行隐私保护成为当前的研究热点。针对医疗大数据在发布过程中隐私保护问题,提出了基于属性效用值排序法AUR-Tree(attribute utility value ranking-tree)差分隐私数据发布算法。该算法用属性效用值排序法衡量准标识属性对敏感属性的影响程度,以此作为迭代分割的度量依据,采用基于泛化的自顶向下迭代分割分类树技术,通过类等差法合理地分配隐私预算从而实现在医疗数据发布过程中的隐私保护。实验结果表明:该算法在极大地提高了数据的安全性、有效性和可用性的前提下,还保留了后续数据挖掘的价值。展开更多
An attribute-based ring signature scheme in lattice was proposed in this paper. In this signature scheme, an entity’s attributes correspond to the columns of a lattice matrix, and the signature was generated by using...An attribute-based ring signature scheme in lattice was proposed in this paper. In this signature scheme, an entity’s attributes correspond to the columns of a lattice matrix, and the signature was generated by using a subset of these attributes. The entities possessing these attributes form a ring. The scheme is computationally efficient than the schemes based on the integer factor problem and discrete logarithm problem, furthermore it is still secure in quantum computing environment.展开更多
结合属性树结构及分层IBE(Identity Based Encryption)加密机制,提出了一种基于属性树结构的分层隐藏证书模型。该模型使用属性树来组织敏感信息,并采用分层的隐藏证书来携带并传递双方交换的证书、访问控制策略、资源等信息,在保护了...结合属性树结构及分层IBE(Identity Based Encryption)加密机制,提出了一种基于属性树结构的分层隐藏证书模型。该模型使用属性树来组织敏感信息,并采用分层的隐藏证书来携带并传递双方交换的证书、访问控制策略、资源等信息,在保护了上述敏感信息的前提下,将属性从单一原子扩展为属性树,解决了基于属性访问控制策略所固有的网络开销大、证书往来过于频繁等缺点,同时也提高了隐藏证书系统的可用性和可扩展性。展开更多
文摘随着医学技术的进步和大数据时代的到来,在数据发布时如何对患者就诊记录中的敏感信息进行隐私保护成为当前的研究热点。针对医疗大数据在发布过程中隐私保护问题,提出了基于属性效用值排序法AUR-Tree(attribute utility value ranking-tree)差分隐私数据发布算法。该算法用属性效用值排序法衡量准标识属性对敏感属性的影响程度,以此作为迭代分割的度量依据,采用基于泛化的自顶向下迭代分割分类树技术,通过类等差法合理地分配隐私预算从而实现在医疗数据发布过程中的隐私保护。实验结果表明:该算法在极大地提高了数据的安全性、有效性和可用性的前提下,还保留了后续数据挖掘的价值。
基金Supported by National High Technology Research and Development Plan of China (2009AA01Z403, 2009AA01Z435)
文摘An attribute-based ring signature scheme in lattice was proposed in this paper. In this signature scheme, an entity’s attributes correspond to the columns of a lattice matrix, and the signature was generated by using a subset of these attributes. The entities possessing these attributes form a ring. The scheme is computationally efficient than the schemes based on the integer factor problem and discrete logarithm problem, furthermore it is still secure in quantum computing environment.
文摘结合属性树结构及分层IBE(Identity Based Encryption)加密机制,提出了一种基于属性树结构的分层隐藏证书模型。该模型使用属性树来组织敏感信息,并采用分层的隐藏证书来携带并传递双方交换的证书、访问控制策略、资源等信息,在保护了上述敏感信息的前提下,将属性从单一原子扩展为属性树,解决了基于属性访问控制策略所固有的网络开销大、证书往来过于频繁等缺点,同时也提高了隐藏证书系统的可用性和可扩展性。
