On the Security of Privacy-Preserving Keyword Searching for Cloud Storage Services

While the traditional public-key encryption schemes with keyword search (PEKS) were pointed out suffering the performance problems, some high-performance PEKS recently have drawn more attentions. Unfortunately, these performance-enhanced schemes could encounter the same security attacks as the traditional PEKS met before. In this paper, Liu et al.'s privacy-preserving keyword searching scheme for cloud storage services (SPKS) is pointed out suffering the security attack of confidentiality. Precisely, an outside attacker could perform the test process by collecting the transmitted ciphertexts and trapdoors from senders and receivers, respectively. Thus, the relationship between encrypted data and the trap- doors is disclosed. An improved version is presented to avoid the security attacks and, furthermore, to benefit the advantages of SPKS as well.

並列關鍵字

Designated tester ； privacy-preserving keyword searching ； public-key encryption schemes with keyword search ； searchable encryption

國際替代計量

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