公开(公告)号：US20190065776A1

公开(公告)日：2019-02-28

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: G06F21/62

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：US20160330017A1

公开(公告)日：2016-11-10

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 ,  H04L9/06

CPC classification number: H04L9/008 ,  H04L9/304

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.

Abstract translation: 提供了一种具有操作错误检测功能的加法同态加密方案的方法和系统。 通过解密基于同态加密技术加密并经受操作的密文获得明文，并且从所获取的明文中提取包含在最终私钥中的附加秘密信息的较低设置比特数作为明文信息。 对所获取的明文中的低位设置位以外的剩余位执行操作错误检查。

公开(公告)号：US20150270958A1

公开(公告)日：2015-09-24

申请号：US14662126

申请日：2015-03-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Nam-Su JHO ,  Ku-Young CHANG ,  Taek-Young YOUN ,  Sung-Kyong UN

IPC: H04L9/08 ,  G06F17/30

CPC classification number: G06F16/2228 ,  H04L9/3239

Abstract: Disclosed herein are a method that generates an index for an efficient range search in an encrypted DB, and a decryption apparatus and method that are capable of searching for desired data and decrypting search results using the index generation method. The presented index generation method includes preparing a private key and a one-way function, calculating a tag for an input plaintext interval using the private key and the one-way function, and dividing the plaintext interval into a plurality of partial intervals, encrypting information of a partial interval including plaintext using the tag, and then generating an encrypted index.

Abstract translation: 这里公开了一种生成用于加密DB中的有效范围搜索的索引的方法，以及能够使用索引生成方法搜索期望数据和解密搜索结果的解密装置和方法。 所提出的索引生成方法包括准备私钥和单向函数，使用私钥和单向函数计算输入明文间隔的标签，并将明文间隔划分为多个部分间隔，加密信息 包括使用标签的明文的部分间隔，然后生成加密的索引。

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.

公开(公告)号：US20210336779A1

公开(公告)日：2021-10-28

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

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：US20210056234A1

公开(公告)日：2021-02-25

申请号：US16988134

申请日：2020-08-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Taek-Young YOUN ,  Nam-Su JHO ,  Dae-Sung MOON ,  Ik-Kyun KIM ,  Seung-Hun JIN

IPC: G06F21/64 ,  H04L9/32

Abstract: Disclosed herein is a method of operating a data management apparatus. The method may include segmenting, by a client device, data into multiple data blocks, generating, by the client device, tags corresponding to the multiple data blocks, generating, by the client device, a representative value by accumulating the tags, generating, by the client device, a client signature value by signing the representative value and a counter value corresponding to the last updated data block, among the multiple data blocks, and transmitting, by the client device, the data and the client signature value to a server.

公开(公告)号：US20170193032A1

公开(公告)日：2017-07-06

申请号：US15051574

申请日：2016-02-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Keonwoo KIM ,  Taek-Young YOUN ,  Ku Young CHANG ,  Nam-Su JHO

IPC: G06F17/30 ,  H04L9/32 ,  H04L29/06

CPC classification number: G06F17/30371 ,  G06F17/30489 ,  H04L9/0861 ,  H04L9/0894 ,  H04L9/3242 ,  H04L63/0428 ,  H04L2209/24

Abstract: In a client, an encryption key is created using plain text data, a first tag is created using the encryption key, and the plain text data are encrypted under the encryption key to create encrypted data. The first tag is transmitted to the server to confirm whether the encrypted data is duplicated and after transmitting the first tag, the encrypted data is transmitted to the server in accordance with the request of the encrypted data from the server.