Object similarity determining methods and apparatuses, and object recommendation methods and apparatuses

Abstract

Implementations of this specification provide methods and apparatuses for object similarity determining and object recommendation. In an example object similarity determining method, object cipher state representations of a first object and a second object are obtained; a representation compensation factor of an object cipher state representation relative to an object plaintext representation in a cipher state representation mode is determined; and an object similarity between the first object and the second object is determined with reference to the representation compensation factor and the object cipher state representations of the first object and the second object.