Crypto Lab Inc.

Yongdong Yeo

Jung Hee Cheon

Taekyung Kim

Jeongdae Hong

The electronic device includes: a communicator communicating with a plurality of external devices each generating an encryption key; a memory; and a processor, wherein the processor stores a plurality of encrypted messages in the memory when receiving the plurality of encrypted messages each encrypted with the encryption key by the plurality of external devices through the communicator, performs a key switching operation using a switching key for the plurality of encrypted messages to change each of the plurality of encrypted messages to the encrypted message encrypted with a common key, and evaluates the changed plurality of encrypted messages by using at least one evaluation key.

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Seoul, South Korea

Yongdong Yeo