[Resource Topic] 2016/981: Efficient No-dictionary Verifiable SSE

Welcome to the resource topic for 2016/981

Title:
Efficient No-dictionary Verifiable SSE

Authors: Wakaha Ogata, Kaoru Kurosawa

Abstract:

In the model of “no-dictionary” verifiable searchable symmetric encryption (SSE) scheme, a client does not need to keep the set of keywords {\cal W} in the search phase, where {\cal W} is called a dictionary. Still a malicious server cannot cheat the client by saying that ``your search word w does not exist in the dictionary {\cal W}" when it exists. In the previous such schemes, it takes O(\log m) time for the server to prove that w \not\in {\cal W}, where m=|{\cal W}| is the number of keywords. In this paper, we show a generic method to transform any SSE scheme (that is only secure against passive adversaries) to a no-dictionary verifiable SSE scheme. In the transformed scheme, it takes only O(1) time for the server to prove that w \not\in {\cal W}.

ePrint: https://eprint.iacr.org/2016/981

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