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为了更好地实现数据安全检索，提出一种基于智能合约的多用户匿名无证书可搜索加密方案。该方案利用智能合约执行关键词密文与搜索陷门的匹配任务，向用户发送正确的密文。同时，使用广播加密技术传递对称密钥，确保用户对搜索得到的密文进行相应的解密，并利用密钥生成中心对用户的身份进行匿名性保护。安全性分析结果表明，关键词密文和陷门均具有不可区分性，且所提方案在关键词猜测攻击下是安全的。性能分析结果表明，与其他方案相比较，该方案的计算量和通信代价更小、效率更高。
Abstract：In order to achieve data security retrieval in a better way, a multi-user anonymous certificateless searchable encryption scheme based on smart contract is proposed.Smart contracts are used to match the keyword ciphertext with the search trapdoor and send correct ciphertexts to users.At the same time, broadcast encryption technology is used to transmit a symmetric key to ensure that users can accordingly decrypt the ciphertext received by searching.The private key generator(PKG) is adopted to protect the user's identity.Security analysis indicates that both the keyword ciphertext and the trapdoor are indistinguishable, and the proposed scheme is safe under keyword guessing attacks.Performance analysis results show that compared with other schemes, the proposed scheme has less computation and communication cost and higher efficiency.
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基本信息:
DOI：10.13682/j.issn.2095-6533.2024.06.005
中图分类号:TP309.7
引用信息:
[1]郑东,康春蕾,郭瑞.基于智能合约的多用户匿名无证书可搜索加密方案[J].西安邮电大学学报,2024,29(06):34-41.DOI:10.13682/j.issn.2095-6533.2024.06.005.
基金信息:
国家自然科学基金项目(62072369,62072371); 陕西省重点研发计划项目(2020ZDLGY08-04); 陕西省创新能力支持计划项目(2020KJXX-052); 陕西省自然科学基金项目(2024JC-YBMS-545)