JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2023, Vol. 58 ›› Issue (9): 28-38.doi: 10.6040/j.issn.1671-9352.0.2022.471

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An encryption scheme supporting wildcard and fuzzy search

Bo ZHAO1,2(),Jing QIN1,3,*(),Jinlu LIU1   

  1. 1. School of Mathematics, Shandong University, Jinan 250100, Shandong, China
    2. Chip and Security Department, Hua Kong Qing Jiao Information Technology Co., Ltd., Beijing 100093, China
    3. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2022-09-03 Online:2023-09-20 Published:2023-09-08
  • Contact: Jing QIN E-mail:zhaobomath@163.com;qinjing@sdu.edu.cn

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Abstract:

Based on n-gram technology, this paper proposes an encryption scheme that can support both wildcard and fuzzy search. In addition, using the Bloom filter optimization scheme, it reduces the index storage overhead and search time. The given security analysis shows that the scheme is non-adaptive semantic security. The performance analysis shows that the optimized scheme has less overhead in storage, communication and trapdoor generation than the previous schemes.

Key words: wildcard search, fuzzy search, keyword feature, vector space model, Bloom filter

CLC Number: 

  • TP309

Fig.1

The index that supports wildcard and fuzzy searches"

Table 1

Complexity analysis"

对比项 文献[8] 文献[15] 文献[21] 方案1 方案2
索引存储开销 O(m) O(n) O(n) O(n) O(n)
索引生成时间 O(m) O(n) O(n) O(n) O(n)
陷门生成时间 O(1) O(1) O(n) O(1) O(1)
通信复杂度 O(1) O(1) O(n) O(1) O(1)
搜索时间 O(m) O(n) O(n) O(n) O(n)
支持模糊搜索 是 否 是 是 是
支持通配符搜索 否 是 是 是 是

Fig.2

Storage overhead"

Fig.3

Index generation time"

Fig.4

Trapdoor generation time"

Fig.5

Communication complexity"

Fig.6

Search time"

Fig.7

Search accuracy"

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