关键词: 云存储, 批处理校验, 多用户多服务器, 隐私保护, 数据完整性验证

Abstract: With the application of cloud storage, more and more users choose to store data on multiple cloud servers, but this way of remote storage also brings challenges to user data integrity. Moreover, the Third-Party Auditor（TPA） recently has been pointed out that it might disclosure user data privacy when checking the data integrity for user. In view of the existing problems of remote data security, privacy and high efficiency verification, a batch data integrity verification scheme which supports privacy protection in multi-user and multi-server environment is proposed. The scheme is proved to be safe under the general group model and the random oracle model. Performance analysis and experiment show that the scheme has a lower communication and computation complexity compared with other schemes of protecting privacy in multi-user and multi-server environment.

Key words: cloud storage, batch processing verification, multi-user and multi-server, privacy protection, data integrity checking