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：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：US09331851B2

公开(公告)日：2016-05-03

申请号：US14312049

申请日：2014-06-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: H04L9/08 ,  H04L9/14 ,  H04L9/30 ,  H04L9/00

CPC classification number: H04L9/0861 ,  H04L9/008 ,  H04L9/14 ,  H04L9/3066 ,  H04L2209/30

Abstract: The present invention relates to a compressed encryption and decryption apparatus comprising: an interface receiving a public key, a secret key and a compression ratio; a memory storing instructions for encryption and decryption of plaintexts; and a processor encrypting and decrypting plaintexts according to the instruction, wherein the instruction comprises instructions performing; generating an extended public key and an extended secret key by revising the public key and the secret key according to the compression ratio; outputting the extended public key; receiving compressed ciphertext; and decrypting the compressed ciphertext using modulo operation for multiplication of the extended secret key and the compressed ciphertext.

Abstract translation: 本发明涉及一种压缩加密和解密装置，包括：接收公钥，秘密密钥和压缩比的接口; 存储用于明文加密和解密的指令的存储器; 以及处理器，根据所述指令对明文进行加密和解密，其中所述指令包括指令执行; 通过根据压缩率修改公钥和秘密密钥来生成扩展公钥和扩展密钥; 输出扩展公钥; 接收压缩密文; 以及使用用于乘法扩展密钥和压缩密文的模运算解密压缩密文。

公开(公告)号：US10902144B2

公开(公告)日：2021-01-26

申请号：US16113530

申请日：2018-08-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Nam-Su Jho ,  Taek-Young Youn ,  Dae Sung Moon ,  Ik Kyun Kim ,  Seung Hun Jin

IPC: G06F21/00 ,  G06F21/62 ,  G06F21/60 ,  G06F7/58

Abstract: In the present invention, by providing an apparatus for securing data comprising a memory for storing information for data processing, a processor configured to partition original data into a plurality of partial data and generate a plurality of divided data by randomly determining positions of each of the plurality of partial data within the original data, and a communication interface configured to transmit each of the plurality of divided data to each of a plurality of servers, respectively, if an attacker obtains a portion of the divided data, it prevents the entire original data from being restored, and the legitimate user can restore the original data accurately even if some divided data is corrupted, and provides an efficient data polymorphic dividing technique that can minimize the amount of calculation required to secure data.

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.