METHOD AND SYSTEM FOR PROVIDING ENCRYPTED DATA FOR SEARCHING OF INFORMATION THEREIN AND A METHOD AND SYSTEM FOR SEARCHING OF INFORMATION ON ENCRYPTED DATA

摘要

A method for providing encrypted data for searching of information includes generating a number of distinct key triples each comprising a public key, a corresponding secret key, and a corresponding evaluation key based on searchable information and files to be searched. Information indicating whether the searchable information is included within the files is encrypted with a key of the generated key triples. The secret keys are merged to obtain a single secret key for an entirety of the searchable information within respective ones of the files for each of the files. The encrypted information is provided with the merged secret keys for each of the files as encrypted data for searching of information within the files. The generating of the distinct key triples and the encrypting of the information are performed based on a multikey homomorphic encryption scheme.

主权项

1. A method for providing encrypted data for searching of information, comprising:
generating a number of distinct key triples each comprising a public key, a corresponding secret key, and a corresponding evaluation key based on one or more searchable information and one or more files to be searched; encrypting information indicating whether or not the one or more searchable information is included within the one or more of the files with a key of the generated key triples; merging the secret keys to obtain a single secret key for an entirety of the one or more searchable information within respective ones of the files for each of the one or more files; and providing the encrypted information with the merged secret keys for each of the one or more files as encrypted data for searching of information within the one or more files, wherein generating the distinct key triples and encrypting the information are performed based on a multikey homomorphic encryption scheme.