公开(公告)号：US20240187226A1

公开(公告)日：2024-06-06

申请号：US18528172

申请日：2023-12-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Young-Kyung LEE ,  Ju-Young KIM ,  Sung-Jin YU ,  Nam-Su JHO

IPC: H04L9/08 ,  G06F21/60 ,  H04L9/32

CPC classification number: H04L9/088 ,  G06F21/60 ,  H04L9/3263

Abstract: Disclosed herein is an apparatus and method for verifying data validity. The method performed by the apparatus includes generating a zero knowledge proof key pair and a certificate using a key generation algorithm of zero knowledge proof in response to a request from a first device to issue a key, generating a verification certificate by verifying validity and quality of data after receiving the data and a verification request from the first device, and performing, by the first device, zero knowledge proof for the data in response to a proof request from a second device that buys the data possessed by the first device.

公开(公告)号：US20240220648A1

公开(公告)日：2024-07-04

申请号：US18462214

申请日：2023-09-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Young-Kyung LEE ,  Ju-Young KIM ,  Sung-Jin YU ,  Nam-Su JHO

IPC: G06F21/62 ,  G06F21/60

CPC classification number: G06F21/6227 ,  G06F21/602

Abstract: Disclosed herein are an order-preserving encryption method and apparatus. The order-preserving encryption method may include when plaintext data is received from a client, storing a ciphertext database (DB), generated by encrypting the plaintext data, and a search index in a server, when a request for a range search query is received from the client, converting the range search query into a search index query statement, querying the server including search indices for the search index query statement, and querying the ciphertext DB of the server for an index ciphertext received in response to the query, and decrypting a ciphertext received as a response from the ciphertext DB and then transferring a plaintext-type response to the query statement to the client.

公开(公告)号：US20240322995A1

公开(公告)日：2024-09-26

申请号：US18413214

申请日：2024-01-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Nam-Su JHO ,  Ju-Young KIM ,  Sung-Jin YU ,  Young-Kyung LEE

IPC: H04L9/06

CPC classification number: H04L9/0618

Abstract: Disclosed herein is a method and apparatus for stateful order-preserving encryption for enhancing security. The method includes generating an order-preserving ciphertext by performing order-preserving encryption on a plaintext, generating a plurality of dummy ciphertexts corresponding to a preset variable for the order-preserving ciphertext, and adding the order-preserving ciphertext and the plurality of dummy ciphertexts to a ciphertext set.