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。

公开(公告)号：US07496203B2

公开(公告)日：2009-02-24

申请号：US10984084

申请日：2004-11-08

申请人： Sora Choi ,  Soojoon Lee ,  Dong Pyo Chi

发明人： Sora Choi ,  Soojoon Lee ,  Dong Pyo Chi

IPC分类号： H04L9/00

CPC分类号： H04L9/0852 ,  H04L9/0833 ,  H04L2209/34

摘要： There is provided a quantum-key distribution method between a plurality of users or groups. A center prepares a predetermined number of entangled states consisting of qubits equal to the number of the users, and generates quantum states consisting of the qubits belonging to each of the entangled states and corresponding to each of the users. The center transmits each of the quantum states to each of the users after an authentication process. Each of the users receiving the quantum state makes public an axis used to measure each of the qubits constituting the quantum states. The number of users in each group measuring the qubits with a predetermined axis is represented by module 4. If the sum of the module 4 of each group is even, each group collects the qubit measurement results of the users and acquires each group key. Therefore, it is possible to provide a high-security quantum-key distribution method between an unspecified number of users or groups.

摘要翻译： 提供了多个用户或组之间的量子密钥分发方法。 中心准备预定数量的由等于用户数的量子位组成的纠缠状态，并且生成由属于每个纠缠状态的量子位组成并且对应于每个用户的量子态。 中心在认证过程之后向用户发送每个量子状态。 接收量子态的每个用户公开一个用于测量构成量子态的量子位的每个轴的轴。 测量具有预定轴的量子位的每个组中的用户数由模块4表示。如果每组的模块4的总和为偶数，则每个组收集用户的量子位测量结果并获取每个组密钥。 因此，可以在未指定数量的用户或组之间提供高安全性的量子密钥分发方法。

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。