A Secure Searchable Public Key Encryption Scheme with a Designated Tester against Keyword Guessing Attacks and Its Extension
A Secure Searchable Public Key Encryption Scheme with a Designated Tester against Keyword Guessing Attacks and Its Extension
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DOI：
10.1007/978-3-642-23324-1_23
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
Chengyu Hu;Pengtao Liu
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文献类型：
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作者：
Chengyu Hu;Pengtao Liu
带有关键字搜索的公钥加密使用户能够向服务器发送一个陷阱，这将使服务器能够定位所有包含关键字W的加密消息，但不会学习其他内容。在一个指定测试者的可搜索公钥加密方案（dPEKS）中，只有指定的服务器可以使用他的私钥测试哪个dPEKS密文与给定的陷门相关。PEKS/dPEKS方案不允许用户解密加密的关键字或解密加密的消息，这限制了其适用性。可解密的可搜索加密可以解决这个问题。本文研究了dPEKS的关键字猜测攻击，提出了一种增强的安全可搜索公钥加密方案。最后，我们将dPEKS方案扩展为一个可解密的可搜索加密方案。
Public key encryption with keyword search enables user to send a trapdoor to a server that will enable the server to locate all encrypted messages containing the keywordW, but learn nothing else. In a searchable public-key encryption scheme with a designated tester (dPEKS), only the designated server can test which dPEKS ciphertext is related with a given trapdoor by using his private key. PEKS/dPEKS scheme does not allow the user to decrypt the encrypted keyword or decrypt the encrypted massage which limits its applicability. Decryptable searchable encryption which enables decryption can resolve this problem. In this paper, we study the keyword guessing attack of dPEKS and propose an enhanced secure searchable public key encryption scheme. At last, we extend the dPEKS scheme to a decryptable searchable encryption scheme with designated tester.