Designated-Senders Public-Key Searchable Encryption Secure against Keyword Guessing Attacks
Designated-Senders Public-Key Searchable Encryption Secure against Keyword Guessing Attacks
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DOI：
10.1109/candar.2017.22
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
Takanori Saito;T. Nakanishi
中科院分区：
文献类型：
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作者：
Takanori Saito;T. Nakanishi
为了在安全云存储中实现关键字搜索，已经提出了具有关键字搜索的公钥加密（PEKS）。然而，PEKS本身就容易受到关键字猜测攻击（KGA）：使用公钥，任何人（包括服务器）都可以计算任何关键字的密文。因此，恶意服务器准备可能的关键字的密文，并且服务器可以测试从接收器发送的陷门的关键字是否与所准备的密文的关键字之一相同。在本文中，我们介绍了一种新的类型的PEKS，是安全的，对KGA，指定的PEKS。在这种类型的PEKS中，接收者可以指定一组可以加密关键字的加密器。因此，由于恶意服务器无法加密任何关键字，因此服务器无法启动KGA。此外，我们还构造了一个指定的广播加密方案。
To achieve keyword search in secure cloud storage, a public-key encryption with keyword search (PEKS) has been proposed. However, the PEKS is inherently vulnerable to the Keyword Guessing Attack (KGA): Using the public key, anyone including the server can compute the ciphertext of any keyword. Thus, a malicious server prepares the ciphertexts of possible keywords, and the server can test if the keyword of a trapdoor sent from the receiver is the same as one of the keywords of the prepared ciphertexts. In this paper, we introduce a new type of PEKS that is secure against KGA, designated-senders PEKS. In this type of PEKS, the receiver can designate a group of senders who can encrypt keywords. Thus, since the malicious server cannot encrypt any keyword, the server cannot launch KGA. Furthermore, we construct a designated-senders PEKS scheme using a broadcast encryption.