公开(公告)号：US20130091360A1

公开(公告)日：2013-04-11

申请号：US13605735

申请日：2012-09-06

申请人： Jung Yeon HWANG ,  Dowon HONG ,  Ku-Young CHANG ,  Jeong Woon CHOI ,  Nam Su JHO ,  Taek Young YOUN

发明人： Jung Yeon HWANG ,  Dowon HONG ,  Ku-Young CHANG ,  Jeong Woon CHOI ,  Nam Su JHO ,  Taek Young YOUN

IPC分类号： H04L9/32 ,  H04L9/08

CPC分类号： H04L9/3255 ,  H04L2209/805

摘要： A lightweight group signature system and method with short signatures according to the exemplary embodiments of the present invention can provide security characteristics similar to group signature mechanisms providing the existing known controllable linkability but can make a revocation method simple by outputting a short signature and providing excellent operation efficiency at the time of signature generation, signature verification, and revocation on smart terminals, and can be widely applied to various anonymity-based application environments, making by making operation efficiency excellent at the time of signature generation and verification and outputting very short signature lengths.

摘要翻译： 根据本发明的示例性实施例的具有短签名的轻量级签名系统和方法可以提供类似于提供现有已知可控可链接性的组签名机制的安全特征，但是可以通过输出短签名并提供优良操作来简化撤销方法 在智能终端签名生成，签名验证和吊销时的效率，可广泛应用于各种基于匿名的应用环境，通过使签名生成和验证时的运行效率优异，并输出非常短的签名长度 。

公开(公告)号：US20100150349A1

公开(公告)日：2010-06-17

申请号：US12612235

申请日：2009-11-04

申请人： Jeong Woon CHOI ,  Ku-Young CHANG ,  Dowon HONG ,  Dong Pyo CHI

发明人： Jeong Woon CHOI ,  Ku-Young CHANG ,  Dowon HONG ,  Dong Pyo CHI

IPC分类号： H04L9/00

CPC分类号： H04L9/0852

摘要： A method and system for performing a quantum bit commitment protocol is provided. The method of performing a quantum bit commitment protocol to send bit information from a first party to a second party includes a pre-commit phase to randomly select and send, by the second party, a quantum state to the first party; a commit phase to perform, by the first party, a unitary transformation on the quantum state to combine the bit information with the quantum state and send the unitary-transformed quantum state to the second party; a hold phase to hold the unitary-transformed quantum state for a predetermined time period; and a reveal phase to provide, by the first party, information about the unitary transformation to the second party to open the bit information to the second party. The reveal phase may include a verification process to check if the opened bit information matches the bit information committed in the commit phase. For example, the verification process may be performed by checking if a quantum state obtained by performing an inverse unitary transformation of the unitary-transformed quantum state matches the quantum state selected in the pre-commit phase.

摘要翻译： 提供了一种用于执行量子位承诺协议的方法和系统。 执行量子比特承诺协议从第一方向第二方发送比特信息的方法包括预提交阶段，以由第二方随机选择并向第一方发送量子状态; 由第一方执行量子态的单一变换以将比特信息与量子状态组合并将单一变换的量子态发送到第二方的提交阶段; 一个保持相位，以保持单一变换的量子状态达预定的时间段; 以及揭露阶段，由第一方提供关于向第二方进行单一转换的信息，以向第二方开放位信息。 揭示阶段可以包括验证过程，以检查打开的比特信息是否与提交阶段中提交的比特信息匹配。 例如，可以通过检查通过执行单一变换的量子态的逆酉变换获得的量子态与在提交前阶段中选择的量子态相匹配来执行验证处理。

公开(公告)号：US20140068765A1

公开(公告)日：2014-03-06

申请号：US12971853

申请日：2010-12-17

申请人： Jeong-Woon CHOI ,  Ku-Young CHANG ,  Tae-Gon NOH ,  Dong-Pyo CHI ,  Soo-Joon LEE

发明人： Jeong-Woon CHOI ,  Ku-Young CHANG ,  Tae-Gon NOH ,  Dong-Pyo CHI ,  Soo-Joon LEE

IPC分类号： H04L29/06

CPC分类号： H04L63/1416 ,  H04L9/0852

摘要： the present invention provides a method for authenticating a user in a multiparty quantum communication comprising: generating l quantum entangled states with N particles and transmitting each particle of the l quantum entangled states to N users, by a quantum communication server, wherein the N is a natural number larger than 2; determining, by the quantum communication server, whether a disguised attacker exists among N users on the basis of a first error rate calculated by using n quantum states randomly selected from the l quantum states possessed by the users respectively and a previously shared secret key in each of the users; and controlling, by the quantum communication server, each of the users to generate a new secret key using mk quantum states and replace the previously shared secret key with the new secret key.

摘要翻译： 本发明提供了一种用于在多方量子通信中认证用户的方法，包括：通过量子通信服务器产生1个N个粒子的量子纠缠状态和向N个用户发送1个量子纠缠状态的每个粒子，其中N是 自然数大于2; 由量子通信服务器根据从用户分别拥有的l个量子状态中随机选择的n个量子状态计算出的第一误差率和在每个用户中预先共享的密钥，确定N个用户之间是否存在伪装的攻击者 的用户; 并且由量子通信服务器控制每个用户以使用mk量子态生成新的秘密密钥，并用新的秘密密钥替换先前共享的密钥。