公开(公告)号：US20170048058A1

公开(公告)日：2017-02-16

申请号：US15306072

申请日：2015-04-23

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Shuqin REN ,  Benjamin Hong Meng TAN ,  Khin Mi Mi AUNG ,  Sivaraman SUNDARAM

IPC: H04L9/00 ,  H04L9/06

Abstract: 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.

Abstract translation: 提供了生成密文的方法。 该方法包括加密输入数据以产生加密数据，并且随机化加密数据以产生密文。 特别地，随机化处理包括使用密码垫对加密数据执行异或（xor）操作，由此基于第一密钥的XOR同态函数使用基于 加密数据。 还提供了用于生成密文的相应系统，用于解密密文的相应方法和系统，以及用于搜索诸如不受信任的服务器的数据库中的密文的相应方法和系统。