Abstract: According to the present disclosure, a query information processing method of a database performed on a computing device includes: identifying query information requested from a client; acquiring initial search result data from a fully homomorphic encrypted database in response to the query information; performing a finite extension field-based grouping operation in response to the initial search result data; and providing the grouping-operated search result data to the client.

Abstract: According to the present disclosure, a query information processing method of a database performed on a computing device includes: identifying query information requested from a client; acquiring initial search result data from a fully homomorphic encrypted database in response to the query information; performing a finite extension field-based grouping operation in response to the initial search result data; and providing the grouping-operated search result data to the client.

Abstract: According to the present disclosure, a query information processing method of a database performed on a computing device includes: pre-building a plaintext index corresponding to a fully homomorphic encrypted structured database; generating an encryption index by homomorphically encrypting the plaintext index; identifying query information requested from a client; indexing the encryption index in response to the query information; acquiring search result data through a homomorphic operation corresponding to a result value indexed by the encryption index; and providing the search result data to the client.

Abstract: According to the present disclosure, a query information processing method of a database performed on a computing device includes: identifying query information requested from a client; acquiring initial search result data from a fully homomorphic encrypted database in response to the query information; performing a finite extension field-based grouping operation in response to the initial search result data; and providing the grouping-operated search result data to the client.