Crypto Lab Inc.

Miran Kim

Yongsoo Song

Jung Hee Cheon

Kyoohyung Han

Chanhwa Lee

Junghee Cheon

Hyungbo Shim

Andrey Kim

Junsoo Kim

An operation apparatus and method for processing a homomorphic encrypted message are disclosed. The method includes producing an approximate polynomial corresponding to an operation function to be applied to a homomorphic encrypted message and approximately operating the homomorphic encrypted message using the approximate polynomial. Thus, an encrypted message may be efficiently processed.

Apparatus for approximately processing encrypted messages and methods thereof

The present disclosure provides a computer-implemented method for processing dynamic data by dynamic data processing device. The device comprises a homomorphic encryption module and a plurality of computing modules running in parallel. The method comprises carrying out, by the homomorphic encryption module, fully homomorphic encryption to dynamic data received from an object which generates the dynamic data; updating, by the computing module which is not in bootstrapping, the encrypted state variable; and carrying out, by the computing module which completes bootstrapping, the first update to the encrypted state variable. The first update to the encrypted state variable after completion of bootstrapping is carried out by(t+N)&#x2192;A(t)+&#x3a3;AB((t+j)&#x2212;(t+j)).

Method for processing dynamic data by fully homomorphic encryption method

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Seoul, South Korea

Miran Kim