公开(公告)号：US20140270159A1

公开(公告)日：2014-09-18

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: H04L9/08 ,  H04L9/06 ,  H04L9/30

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：US20140062761A1

公开(公告)日：2014-03-06

申请号：US13732997

申请日：2013-01-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Taek Young YOUN ,  Do Won HONG

IPC: G01S13/76

CPC classification number: G01S13/765 ,  G01S13/78 ,  G06F21/554 ,  H04L63/123 ,  H04W12/06 ,  H04W12/12

Abstract: A tag decides a response based on a plurality of queries received from a reader, determines whether to transmit the response, transmits the response to the reader according to the results of the determination, and transmits a message authentication code including communication content to the reader. The reader calculates a consumed time period which is the time difference between a transmission time at which the queries are transmitted and a reception time at which the response is received, calculates an average consumed time period of the consumed time period, and measures a distance to the tag based on the average consumed time period. Accordingly, it is possible to check an attacker's intervention with a high probability, thereby improving distance measurement performance. Also, the tag may efficiently perform computing and communication.

Abstract translation: 标签基于从读取器接收的多个查询来决定响应，确定是否发送响应，根据确定的结果向响应者发送响应，并将包括通信内容的消息认证码发送给读取器。 读取器计算作为发送查询的发送时间与接收到响应的接收时间之间的时间差的消耗时间段，计算消耗时间段的平均消耗时间段，并且测量到 基于平均消费时间段的标签。 因此，可以高概率地检查攻击者的干预，从而提高距离测量性能。 此外，标签可以有效地执行计算和通信。

公开(公告)号：US20200285634A1

公开(公告)日：2020-09-10

申请号：US16811051

申请日：2020-03-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

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

IPC: G06F16/23 ,  G06F16/22

Abstract: A method of providing a search index based on a Bloom filter in a distributed data sharing environment based a block chain includes generating, by a data generating device, Bloom filters used as the search index on the basis of a hash value calculated by applying a hash function to a keyword set for searching for data which is to be shared, generating, by a block providing server, a new block on the basis of the Bloom filters and the data received from the data generating device and performing proof of work (PoW) on the new block, for adding the new block to the block chain, and distributing, by a block distributing server, block chain data including the new block added to the block chain.