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METHOD AND SYSTEM FOR GENERATING/DECRYPTING CIPHERTEXT, AND METHOD AND SYSTEM FOR SEARCHING CIPHERTEXTS IN A DATABASE
METHOD AND SYSTEM FOR GENERATING/DECRYPTING CIPHERTEXT, AND METHOD AND SYSTEM FOR SEARCHING CIPHERTEXTS IN A DATABASE
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机译:生成/解密密文的方法和系统,以及在数据库中搜索密文的方法和系统
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摘要
There is provided a method of generating a ciphertext. The method includes encrypting an input data to produce an encrypted data, and randomizing the encrypted data to produce the ciphertext. In particular, the randomizing process includes performing an exclusive-or (xor) operation on the encrypted data with a cipher pad, whereby the cipher pad is generated based on an xor-homomorphic function of a first key using a second key generated based on the encrypted data. There is also provided a corresponding system for generating a ciphertext, a corresponding method and system for decrypting a ciphertext, and a corresponding method and system for searching ciphertexts in a database, such as at an untrusted server.
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