Abstract
Concerning the identity-based binary tree key revocation scheme, the storage and use of binary tree can not be guaranteed in open cloud environment. This paper proposes a distributed key revocation scheme based on shared binary tree. The scheme splits the binary key tree into branches and distributes them to multiple nodes to save. Then multiple nodes work together to rebuild the key. At the same time, this paper optimizes the lookup algorithm during rebuilding. It solves the issues on distributed storage, safe use and fast reconstruction of the binary tree in the open environment. Experiments and analysis show that the scheme has higher efficiency and makes identity-based key revocation scheme run safely in the open environment.
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