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Privacy preserving revocation update protocol for Group Signature in cloud

机译：云中组签名的隐私保留更新协议

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Cloud computing provides the secured data sharing among the groups. In which, dynamic group data sharing in a multi-owner environment in the untrusted clouds is the vital problem. While, the group manager updates the revocation list every day, even when no user currently moving away from the group it creates the storage overhead and high data encryption. To overcome this, the proposed technique is based on Revocation Time protocol for each user in the group. Here Revocation Time protocol defines when the user revoked from the group the access of the information should be restricted. Then, this particular user's identification will become invalid. Due to this, the revocation list cannot be updated each day. So the storage overhead can be reduced. Until the data owner provides the new identity for the novel user, the group data cannot be accessed by any member. Elliptic curve algorithm is used to maintain the integrity of information and makes the secure access to the requested user. Based on this, security is maintained to restrict the unauthorized access and data integrity is achieved.
机译：云计算提供了组之间的安全数据共享。其中，在不受信任的云中的多人环境中共享动态组数据是重要问题。虽然，Group Manager每天更新撤销列表，即使当前当前没有从组中移动的用户时，它会创建存储开销和高数据加密。为了克服这一点，所提出的技术基于该组中的每个用户的撤销时间协议。这里撤销时间协议定义当从组中撤销的用户时，应限制信息的访问。然后，这个特定的用户的标识将变为无效。由于此，撤销列表无法每天更新。所以可以减少存储开销。在数据所有者为新颖用户提供新的身份之前，任何成员都无法访问组数据。椭圆曲线算法用于维持信息的完整性，并使所请求的用户安全访问。基于此，维护安全性以限制未经授权的访问和数据完整性。

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