Crypto Lab Inc.

Samsung Electronics Co., Ltd.

Seoul National University

Snu Rdb Foundation

Ulsan National Institute of Science and Technology

Junghee Cheon

Yongsoo Song

Jinsu Kim

Kyunghee Lee

Joohee Lee

Bumhan Kim

Eunyoung Kwon

Duhyeong Kim

Hyunsook Hong

Chanhwa Lee

Hyungbo Shim

Junsoo Kim

Miran Kim

Hongtae Kim

Hansol Ryu

Aaram Yun

The computer-implemented method for generating a public key and a secret key of the present disclosure comprises determining, by a processor, the secret key (s) by sampling from a distribution over {&#x2212;1, 0, 1}; determining, by a processor, a first error vector (e) by sampling from (D)and a second error value (e') by sampling from D; choosing, by a processor, a randomly uniform matrix A which satisfies A&#xb7;s=e (mod q); choosing, by a processor, a random column vector b which satisfies and determining, by a processor, the public key (pk) by (A&#x2225;b)&#x2208;R.

Method for generating public key and secret key based on module-wavy and module-LWR and method of encryption and decryption using the keys

The computer-implemented method for authenticating secret information according to an aspect of the present disclosure, comprises receiving, by an authentication server, Q{right arrow over (X)} from a terminal for registering secret information; storing, by the authentication server, the received Q{right arrow over (X)}; receiving, by the authentication server, a vector {right arrow over (Z)} from a terminal for requesting authentication of secret information; calculating, by the authentication server, the inner product of Q{right arrow over (X)} and {right arrow over (Z)}; calculating, by the authentication server, &#xbd;(n&#x2212;the inner product); and determining, by the authentication server, that the authentication is successful if &#xbd;(n&#x2212;the inner product) is within a predetermined value and that the authentication fails otherwise.

Method for authenticating secret information which protects secret information

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

A data protection method and apparatus that can protect data through encryption using a Boolean function is provided. The data protection method includes applying an inverse affine transformation to data to be encrypted using a Boolean function; applying round operations of an Advanced Encryption Standard (AES) cryptographic algorithm to the inverse-affine transformed data; and producing ciphertext data by applying an affine transformation to the result of the round operations.

Data protection method and apparatus

Growing community of inventors

Seoul, South Korea

Junghee Cheon