公开(公告)号：US11791997B2

公开(公告)日：2023-10-17

申请号：US17239237

申请日：2021-04-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Nam-Su Jho ,  Juyoung Kim ,  Taek-Young Youn ,  Ku Young Chang

IPC: H04L9/08 ,  G06N3/04

CPC classification number: H04L9/0869 ,  G06N3/04

Abstract: A method and an apparatus for generating a secret key for encrypted communication using a synchronized neural network, which includes: generating initial codewords based on a bit string of weight values of the synchronized neural network and transmitting a first partial codeword of the initial codewords to a device of another party; receiving a second partial codeword generated by the device of the other party and combining final codewords based on the second partial codeword received from the device of the party and the bit string of the weight values; performing an error correction on the combined final codewords and transmitting first restoration success information according to the error correction to the device of the other party; and receiving second restoration success information from the device of the other party and generating the secret key based on the restoration success information of the device of the other party, are provided.

公开(公告)号：US09374220B2

公开(公告)日：2016-06-21

申请号：US14174519

申请日：2014-02-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Taek Young Youn ,  Nam Su Jho ,  Jung Yeon Hwang ,  Ku Young Chang

IPC: H04L9/30 ,  H04L9/08 ,  H04L9/00

CPC classification number: H04L9/0861 ,  H04L9/008 ,  H04L9/30

Abstract: The present invention relates to a technique which provides a function of compressed encryption large pieces of plaintext information in a single ciphertext in order to improve a space efficiency of the encryption data which occupies most of a storage space to design an efficient SHE technique which is a base of the FHE technique design. More specifically, the present invention relates to a technique which is designed to improve a structure in which only one bit is encrypted/decrypted in the technique of the prior art to encrypt/decrypt multiple bit information to improve the space efficiency for storing a ciphertext.

Abstract translation: 本发明涉及一种在单个密文中提供压缩大量明文信息的功能的技术，以便提高占用大部分存储空间的加密数据的空间效率，从而设计出一种有效的SHE技术 FHE技术设计基地。 更具体地，本发明涉及一种技术，其被设计为改进在现有技术中只有一个比特被加密/解密以加密/解密多个比特信息以提高用于存储密文的空间效率的结构。

公开(公告)号：US10270588B2

公开(公告)日：2019-04-23

申请号：US15147806

申请日：2016-05-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taek-Young Youn ,  Nam-Su Jho ,  Ku Young Chang

IPC: H04L9/00 ,  H04L9/30

Abstract: Provided are a method and a system for an additive homomorphic encryption scheme with operation error detection functionality. A plaintext is obtained by decrypting a ciphertext encrypted based on a homomorphic encryption technique and subjected to an operation and lower setting bits corresponding to additional secret information included in a final private-key are extracted as plaintext information from the acquired plaintext. An operation error check is performed on the remaining bits other than the lower setting bits in the acquired plaintext.

公开(公告)号：US08873749B2

公开(公告)日：2014-10-28

申请号：US13705666

申请日：2012-12-05

Applicant: Electronics and Telecommunications Research Institute

Inventor： Nam-Su Jho ,  Ku Young Chang ,  Do Won Hong

IPC: H04L9/00 ,  H04L9/08 ,  H04L9/30

CPC classification number: H04L9/0861 ,  H04L9/3073

Abstract: A multi-user searchable encryption system includes a key generation center to issue a private secret key to a user and trace information regarding a user who has generated an index, and a user terminal device to generate an index for searching for a database using the private secret key. The multi-user searchable encryption system includes a database (DB) server that verifies the index generated by the user terminal device and searches for corresponding data to the verified index.

Abstract translation: 多用户可搜索的加密系统包括密钥生成中心，用于向用户发出专用秘密密钥并跟踪关于已经生成索引的用户的信息;以及用户终端设备，用于生成用于使用私有的搜索数据库的索引 密钥。 多用户可搜索的加密系统包括数据库（DB）服务器，用于验证由用户终端设备生成的索引并搜索与已验证索引相对应的数据。

公开(公告)号：US10515225B2

公开(公告)日：2019-12-24

申请号：US15179375

申请日：2016-06-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taek-Young Youn ,  Keonwoo Kim ,  Ku Young Chang ,  Nam-Su Jho

IPC: G06F21/62 ,  H04L29/06 ,  G06F16/13 ,  G06F16/174 ,  G06F16/22 ,  G06F16/23

Abstract: The present invention relates to a method and device for verifying data ownership. The user may verify whether the server actually owns the data to be uploaded by him, and the server may simultaneously verify whether the user actually owns the data.