Homomorphic operation accelerator and homomorphic operation performing device including the same

A homomorphic operation performing device comprising:

• a communication interface configured to communicate with a first homomorphic encryption client to receive cipher text data and a second homomorphic encryption client to receive homomorphic operation information associated with homomorphic operations to be performed on the cipher text data;
• and
• a homomorphic operation accelerator including a plurality of circuits that perform the homomorphic operations, the homomorphic operation accelerator configured to:
• selectively activate or deactivate each of a plurality of enable signals applied to the plurality of circuits based on the homomorphic operation information and a homomorphic encryption information, the homomorphic encryption information being associated with a homomorphic encryption algorithm used to generate the cipher text data;
• and
• activate or deactivate each of the plurality of circuits based on the plurality of enable signals,
• wherein the homomorphic operations are performed on the cipher text data based on activated circuits among the plurality of circuits,
• wherein, based on the homomorphic operations corresponding to a first arithmetic operation and the homomorphic encryption algorithm being a first type of homomorphic encryption algorithm, the homomorphic operation accelerator is further configured to deactivate a first type of circuit, among the plurality of circuits, and
• wherein, based on the homomorphic operations corresponding to a second arithmetic operation and the homomorphic encryption algorithm being a second type of homomorphic encryption algorithm, the homomorphic operation accelerator is further configured to deactivate a second type of circuit, among the plurality of circuits.

A homomorphic operation accelerator comprising:

• a plurality of circuits including a homomorphic adder, a homomorphic multiplier and a bootstrapping circuit;
• and
• a homomorphic operation managing circuit configured to:
• receive cipher text data, homomorphic encryption information and homomorphic operation information from an external device, the homomorphic encryption information being associated with a homomorphic encryption algorithm used to generate the cipher text data, the homomorphic operation information being associated with homomorphic operations to be performed on the cipher text data;
• selectively activate or deactivate each of a plurality of enable signals applied to the plurality of circuits based on the homomorphic encryption information and the homomorphic operation information;
• activate or deactivate each of the plurality of circuits based on the plurality of enable signals;
• and
• control one of the homomorphic adder, the homomorphic multiplied and the bootstrapping circuit based on the homomorphic encryption information and the homomorphic operation information to perform one of a homomorphic addition, a homomorphic multiplication and a bootstrapping on the cipher text data, wherein the homomorphic operations are performed on the cipher text data based on activated circuits among the plurality of circuits,
• wherein, based on the homomorphic operations corresponding to a first arithmetic operation and the homomorphic encryption algorithm being a first type of homomorphic encryption algorithm, the homomorphic operation managing circuit is further configured to deactivate a first type of circuit, among the plurality of circuits, and
• wherein, based on the homomorphic operations corresponding to a second arithmetic operation and the homomorphic encryption algorithm being a second type of homomorphic encryption algorithm, the homomorphic operation managing circuit is further configured to deactivate a second type of circuit, among the plurality of circuits.