信息技术为教师学习共同体带来便利的同时,也产生了新的隐私安全问题。为此,文章通过分析云环境下用户的隐私保护内涵和传统的隐私保护技术,针对云环境下教师学习共同体的隐私安全问题,提出了运用ORAM(Oblivious Random Access Machine...信息技术为教师学习共同体带来便利的同时,也产生了新的隐私安全问题。为此,文章通过分析云环境下用户的隐私保护内涵和传统的隐私保护技术,针对云环境下教师学习共同体的隐私安全问题,提出了运用ORAM(Oblivious Random Access Machine)与群签名的融合技术来保护云环境下教师学习共同体隐私的策略。该策略的提出,既解决了传统加密方案无法防止云端数据访问模式序列泄露的问题,也可有效应对传统云端访问控制无法保护云端数据访问模式序列的挑战。此外,文章提出的ORAM与群签名的融合技术切实保护了云环境下教师学习共同体的隐私,促进了信息时代教师专业的可持续、高质量发展。展开更多
Due to its characteristics distribution and virtualization, cloud storage also brings new security problems. User＇s data is stored in the cloud, which separated the ownership from management. How to ensure the securi...Due to its characteristics distribution and virtualization, cloud storage also brings new security problems. User＇s data is stored in the cloud, which separated the ownership from management. How to ensure the security of cloud data, how to increase data availability and how to improve user privacy perception are the key issues of cloud storage research, especially when the cloud service provider is not completely trusted. In this paper, a cloud storage ciphertext retrieval scheme based on AES and homomorphic encryption is presented. This ciphertext retrieval scheme will not only conceal the user retrieval information, but also prevent the cloud from obtaining user access pattern such as read-write mode, and access frequency, thereby ensuring the safety of the ciphertext retrieval and user privacy. The results of simulation analysis show that the performance of this ciphertext retrieval scheme requires less overhead than other schemes on the same security level.展开更多
文摘信息技术为教师学习共同体带来便利的同时,也产生了新的隐私安全问题。为此,文章通过分析云环境下用户的隐私保护内涵和传统的隐私保护技术,针对云环境下教师学习共同体的隐私安全问题,提出了运用ORAM(Oblivious Random Access Machine)与群签名的融合技术来保护云环境下教师学习共同体隐私的策略。该策略的提出,既解决了传统加密方案无法防止云端数据访问模式序列泄露的问题,也可有效应对传统云端访问控制无法保护云端数据访问模式序列的挑战。此外,文章提出的ORAM与群签名的融合技术切实保护了云环境下教师学习共同体的隐私,促进了信息时代教师专业的可持续、高质量发展。
基金the National Natural Science Foundation of China under Grant，the Fundamental Research Funds for the Central Universities under Grant No.FRF-TP-14-046A2
文摘Due to its characteristics distribution and virtualization, cloud storage also brings new security problems. User＇s data is stored in the cloud, which separated the ownership from management. How to ensure the security of cloud data, how to increase data availability and how to improve user privacy perception are the key issues of cloud storage research, especially when the cloud service provider is not completely trusted. In this paper, a cloud storage ciphertext retrieval scheme based on AES and homomorphic encryption is presented. This ciphertext retrieval scheme will not only conceal the user retrieval information, but also prevent the cloud from obtaining user access pattern such as read-write mode, and access frequency, thereby ensuring the safety of the ciphertext retrieval and user privacy. The results of simulation analysis show that the performance of this ciphertext retrieval scheme requires less overhead than other schemes on the same security level.
