Data sharing is a main application of cloud computing. Some existing solutions are proposed to provide flexible access control for outsourced data in the cloud. However, few attentions have been paid to group-oriented...Data sharing is a main application of cloud computing. Some existing solutions are proposed to provide flexible access control for outsourced data in the cloud. However, few attentions have been paid to group-oriented data sharing when multiple data owners want to share their private data for cooperative purposes. In this paper, we put forward a new paradigm, referred to as secure, scalable and efficient multi-owner(SSEM) data sharing in clouds. The SSEM integrates identity-based encryption and asymmetric group key agreement to enable group-oriented access control for data owners in a many-to-many sharing pattern. Moreover, with SSEM, users can join in or leave from the group conveniently with the privacy of both group data and user data.We proposed the key-ciphertext homomorphism technique to construct an SSEM scheme with short ciphertexts. The security analysis shows that our SSEM scheme achieves data security against unauthorized accesses and collusion attacks. Both theoretical and experimental results confirm that our proposed scheme takes users little costs to share and access outsourced data in a group manner.展开更多
《与贸易有关的知识产权协定》规定了药品试验数据规制的基本制度,此基础上我国采取商业秘密规制模式保护药品试验数据。但是,商业秘密规制模式一方面存在保护力度不足等问题,另一方面存在药品试验数据无法进入“公域”的问题。《全面...《与贸易有关的知识产权协定》规定了药品试验数据规制的基本制度,此基础上我国采取商业秘密规制模式保护药品试验数据。但是,商业秘密规制模式一方面存在保护力度不足等问题,另一方面存在药品试验数据无法进入“公域”的问题。《全面与进步跨太平洋伙伴关系协定》(The Comprehensive and Progressive Agreement for Trans-Pacific Partnership,CPTPP)构建了更高标准的药品试验数据规制制度,具体包括采取数据专有权、保护生物制剂试验数据等。为对接CPTPP,我国应重构药品试验数据规制制度,具体包括确立数据专有权模式并明确保护期限,此外构建药品试验数据公开制度和规制后续排他权的制度。展开更多
基金supported in part by National High-Tech Research and Development Program of China(“863”Program)under Grant No.2015AA016004National Natural Science Foundation of China under Grants No.61173154,61272451,61572380
文摘Data sharing is a main application of cloud computing. Some existing solutions are proposed to provide flexible access control for outsourced data in the cloud. However, few attentions have been paid to group-oriented data sharing when multiple data owners want to share their private data for cooperative purposes. In this paper, we put forward a new paradigm, referred to as secure, scalable and efficient multi-owner(SSEM) data sharing in clouds. The SSEM integrates identity-based encryption and asymmetric group key agreement to enable group-oriented access control for data owners in a many-to-many sharing pattern. Moreover, with SSEM, users can join in or leave from the group conveniently with the privacy of both group data and user data.We proposed the key-ciphertext homomorphism technique to construct an SSEM scheme with short ciphertexts. The security analysis shows that our SSEM scheme achieves data security against unauthorized accesses and collusion attacks. Both theoretical and experimental results confirm that our proposed scheme takes users little costs to share and access outsourced data in a group manner.
文摘《与贸易有关的知识产权协定》规定了药品试验数据规制的基本制度,此基础上我国采取商业秘密规制模式保护药品试验数据。但是,商业秘密规制模式一方面存在保护力度不足等问题,另一方面存在药品试验数据无法进入“公域”的问题。《全面与进步跨太平洋伙伴关系协定》(The Comprehensive and Progressive Agreement for Trans-Pacific Partnership,CPTPP)构建了更高标准的药品试验数据规制制度,具体包括采取数据专有权、保护生物制剂试验数据等。为对接CPTPP,我国应重构药品试验数据规制制度,具体包括确立数据专有权模式并明确保护期限,此外构建药品试验数据公开制度和规制后续排他权的制度。
