HIGHLIGHTS
- What: The authors propose a fast and firmly secure SSE scheme called Veruna to address these limitations. The authors design a new state chain structure which can not only ensure privacy with less storage overhead of the server but also achieve strong backward privacy with only a few cryptographic operations in the server. The authors design a novel state chain structure that links the keyword`s state nodes for each update through a state token. The authors design a new state chain structure and a simple yet effective approach to ensure that nothing about the encrypted entry . . .

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