| 摘要 |
<p>The present invention relates to a method for providing encrypted data for searching of information therein, comprising the steps of a) Generating a number of distinct key triples each comprising a public key, a corresponding secret key and a corresponding evaluation key being dependent on one or more searchable information and being dependent on one or more files on which a search may be performed, b) Encrypting the information indicating whether or not the one or more searchable information is included in one or more of the files with a key of the generated key triples, c) Merging the one or more secret keys to obtain a single secret key for all searchable information within a file for each file and d) Providing the encrypted information with the merged secret keys for each file as encrypted data for searching of information therein, wherein at least steps a)-b) are based on a multikey homomorphic encryption scheme. The present invention further relates to a method of information on encrypted data, a system for providing encrypted data for searching of information therein and a system of searching of information on encrypted data.</p> |
