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Gu Chunsheng and Gu Jixing Known-plaintext attack on secure kNN computation on encrypted databases Security and Communication Networks 7

Version of Record online: 17 JAN 2014 | DOI: 10.1002/sec.954

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To protect user privacy and data security in cloud computing, a secure k-nearest neighbor computation-enhanced scheme on encrypted database has been proposed by Wong, Cheung, Kao and Mamoulis, which is proven resistant to the known-plaintext attack. We show that contrary to claims, the enhanced asymmetric scalar-product-preserving encryption cannot resist known-plaintext attack by directly solving a secret key from a set of known plaintext-ciphertext pairs.

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