发明名称 |
METHOD AND SYSTEM FOR GENERATING / DECRYPTING CIPHERTEXT, AND METHOD AND SYSTEM FOR SEARCHING CIPHERTEXTS IN A DATABASE |
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. |
申请公布号 |
SG11201608601T(A) |
申请公布日期 |
2016.11.29 |
申请号 |
SGT11201608601 |
申请日期 |
2015.04.23 |
申请人 |
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH |
发明人 |
REN, SHUQIN;TAN, BENJAMIN HONG MENG;AUNG, KHIN MI MI;SUNDARAM, SIVARAMAN |
分类号 |
H04L9/30;H04K1/00 |
主分类号 |
H04L9/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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