发明名称 |
DATA SEARCH DEVICE, DATA SEARCH METHOD, DATA SEARCH PROGRAM, DATA REGISTRATION DEVICE, DATA REGISTRATION METHOD, DATA REGISTRATION PROGRAM, AND INFORMATION PROCESSING DEVICE |
摘要 |
A data search server stores a system ciphertext including a data ciphertext and a keyword ciphertext in each category-specific DB unit for each data category, and stores each category-determination secret key being associated with each category-specific DB unit. A search request receiving unit receives from a data search terminal a search request including a search trapdoor and an index tag. A data searching unit searches for a category-determination secret key with which the index tag is decrypted to the same value as a key-determination value. Using the search trapdoor, the data searching unit performs a search of a Public-key Encryption with Keyword Search scheme on system ciphertexts in a category-specific DB unit associated with this category-determination secret key. A search result transmitting unit transmits to the data search terminal a data ciphertext included in a system ciphertext which has been found as a hit in the search. |
申请公布号 |
US2014298009(A1) |
申请公布日期 |
2014.10.02 |
申请号 |
US201214350987 |
申请日期 |
2012.01.25 |
申请人 |
Hattori Mitsuhiro;Matsuda Nori;Ito Takashi;Mori Takumi;Hirano Takato |
发明人 |
Hattori Mitsuhiro;Matsuda Nori;Ito Takashi;Mori Takumi;Hirano Takato |
分类号 |
H04L29/06 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Tokyo JP |