会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • 사용자단말의 콘텐츠 접근 제어에 따른 콘텐츠 분배 방법 및 시스템
    • 目录根据用户终端访问控制的分配方法和系统
    • KR101423955B1
    • 2014-08-01
    • KR1020130075344
    • 2013-06-28
    • 고려대학교 산학협력단
    • 이동훈김효승박승환박종환
    • H04N21/6334H04N21/2347H04N21/4623
    • H04N21/26613H04N21/2347
    • The present invention relates to a method and a system to distribute content under the content access control of a user terminal and, more specifically, to a method and a system to distribute content under the content access control of a user terminal. The method comprises the steps of: allowing a key creating server to create a generator and any element belonging to a bilinear group, and to apply the created generator and element to a bilinear function to create a public parameter; allowing the key creating server to receive a set of access structures accessing content from a user terminal, and create an access rights secret key indicating whether it is possible to access the content, based on the set of access structures; allowing a content providing server to receive the public parameter from the key creating server, to encode the content, based on the received public parameter to create content cyphertext, and to transmit the created content cyphertext to the user terminal; and allowing the user terminal to receive the access rights secret key from the key creating server and decode the content cyphertext received from the content providing server, based on the received access rights secret key to access the content. By the above configuration, the method and the system to distribute content under the content access control of a user terminal can allow the user terminal to receive the content or whether it is possible to access the content more efficiently by encoding the access rights secret key indicating whether it is possible to access the content together with the content.
    • 本发明涉及在用户终端的内容访问控制下分发内容的方法和系统,更具体地,涉及在用户终端的内容访问控制下分发内容的方法和系统。 该方法包括以下步骤:允许密钥创建服务器创建生成器和属于双线性组的任何元素,并将创建的生成器和元素应用于双线性函数以创建公共参数; 允许密钥创建服务器接收从用户终端访问内容的一组访问结构,并且基于该组访问结构创建指示是否可能访问内容的访问权限秘密密钥; 允许内容提供服务器从密钥创建服务器接收公共参数,基于接收到的公共参数对内容进行编码以创建内容密文,并将创建的内容密文传送到用户终端; 并且允许用户终端从密钥创建服务器接收访问权限秘密密钥,并且基于接收到的访问内容的访问权限秘密密钥来解码从内容提供服务器接收到的内容密文。 通过上述配置,在用户终端的内容访问控制下分发内容的方法和系统可以允许用户终端接收内容,或者是否可以通过对指示的用户终端的访问权限密钥进行编码来更有效地访问内容 是否可以与内容一起访问内容。
    • 4. 发明公开
    • 원격 컴퓨팅 환경에서의 데이터 검색 방법
    • 在远程计算环境中搜索数据的方法及其方法
    • KR1020140083520A
    • 2014-07-04
    • KR1020120153388
    • 2012-12-26
    • 고려대학교 산학협력단
    • 이동훈박종환구우권
    • G06F21/00G06F17/30G06F15/16H04L9/14
    • H04L63/0435
    • The present invention relates to a data search method capable of preventing an attack from the outside to personal user data during a search process and improving the efficiency of search when a user searches for user′s data after storing the data in a remote server by encrypting the data in a remote computing environment. The disclosed search method includes a step (a) that a user terminal generates a cryptogram of each data and a cryptogram encoded from a file name of a file corresponding to each data to transmit the cryptograms to a remote server and store the cryptograms; a step (b) that the terminal encodes the file name of the file corresponding to the data and transmits a search token to the remote server by encoding the search token for the file name so that the user can download the data among the user′s data by accessing the remote server through the terminal; and a step (c) that the remote server identifies whether the transmitted token is included in the cryptogram encoded from the file name and then when included, transmits a cryptogram included in the cryptogram encoded from the file name and a cryptogram included in the cryptogram of each data to the terminal. All the encoding is performed by symmetric key-based encoding algorithm to solve the project of the present invention.
    • 本发明涉及一种能够防止在搜索过程中从外部攻击个人用户数据的数据搜索方法,并且当用户通过加密将数据存储在远程服务器中之后搜索用户数据时,提高搜索效率 在远程计算环境中的数据。 所公开的搜索方法包括步骤(a),用户终端生成每个数据的密码和从每个数据对应的文件的文件名编码的密码,以将密码发送到远程服务器并存储密码; 步骤(b)终端对与数据对应的文件的文件名进行编码,并通过对文件名称的搜索令牌进行编码,将搜索令牌发送到远程服务器,以便用户可以在用户的 通过终端访问远程服务器的数据; 以及步骤(c),所述远程服务器识别所发送的令牌是否包括在从所述文件名称编码的密码中,然后当包括时,发送包括在从所述文件名编码的密码中的密码以及包含在所述文件名的密码中的密码 每个数据到终端。 所有编码由对称密钥编码算法执行,以解决本发明的项目。
    • 9. 发明公开
    • 브로드캐스트 암호화 방법 및 시스템
    • 广播加密方法和系统
    • KR1020140148295A
    • 2014-12-31
    • KR1020140052248
    • 2014-04-30
    • 고려대학교 산학협력단
    • 이동훈한수민박승환박종환
    • H04L9/30H04L9/14
    • H04L63/00H04L9/14H04L9/30
    • The present invention relates to a broadcast encryption method and a broadcast encryption system. More particularly, the broadcast encryption method includes the following steps: having a key generation unit generate an open key and secret keys dedicated to multiple user terminals; allowing the key generation unit to transmit the open key to a message encryption unit and to transmit secret keys to the user terminals, respectively; allowing the message encryption unit to receive the open key and a plain text message to be encrypted and to generate a symmetric key, a header and a cryptograph with respect to the plain text message based on the open key; allowing the message encryption unit to generate a broadcast cryptograph including a number of user terminals that request to receive the plain message, the header and the cryptograph and transmit the broadcast cryptograph to a server unit; allowing the user terminal to generate an open conversion key and a secret conversion key based on the received secret key and to transmit the open conversion key to the server unit; allowing the server unit to partially decode the broadcast cryptograph by using the received open conversion key and to transmit the partially decoded broadcast cryptograph to the user terminal; and allowing the user terminal to acquire the plain text message by decoding all broadcast cryptograph by using the secret conversion key based on the partially decoded broadcast cryptograph. Thus, the broadcast encryption method and the broadcast encryption system according to the present invention can generate the open conversion key and the secret conversion key by selecting a random number value from a bilinear group, after which the encrypted message can be easily decoded through a small number of operations.
    • 广播加密方法和广播加密系统技术领域本发明涉及广播加密方法和广播加密系统。 更具体地,广播加密方法包括以下步骤:使密钥生成单元生成开放密钥和专用于多个用户终端的秘密密钥; 允许密钥生成单元将打开的密钥发送到消息加密单元,并且分别向用户终端发送秘密密钥; 允许所述消息加密单元接收所述打开密钥和要加密的明文消息,并且基于所述打开密钥生成关于所述明文消息的对称密钥,标题和密码; 允许所述消息加密单元生成包括请求接收所述明文消息的所述多个用户终端的广播密码,所述头部和密码,并将所述广播密码传送到服务器单元; 允许用户终端基于接收到的秘密密钥生成开放转换密钥和秘密转换密钥,并将打开的转换密钥发送到服务器单元; 允许服务器单元通过使用所接收的开放转换密钥对广播密码进行部分解码,并将部分解码的广播密码传送到用户终端; 并且允许用户终端通过使用基于部分解码的广播密码体的秘密转换密钥解码所有广播密码来获取纯文本消息。 因此,根据本发明的广播加密方法和广播加密系统可以通过从双线性组中选择随机数值来生成开放转换密钥和秘密转换密钥,之后可以通过小的方式来解码加密的消息 操作数量
    • 10. 发明授权
    • 브로드캐스트 암호화 방법 및 시스템
    • 广播加密方法和系统
    • KR101533950B1
    • 2015-07-03
    • KR1020140052248
    • 2014-04-30
    • 고려대학교 산학협력단
    • 이동훈한수민박승환박종환
    • H04L9/30H04L9/14
    • 본발명은브로드캐스트암호화방법및 시스템에관한것으로, 보다구체적으로는키생성부가공개키및 복수개의사용자단말별고유한비밀키를생성하는단계; 상기키생성부가상기공개키를메시지암호화부로전송하고, 상기복수개의사용자단말로상기비밀키를각각전송하는단계; 상기메시지암호화부가상기공개키및 암호화하고자하는평문메시지를수신하고, 수신한공개키에기초하여대칭키, 헤더및 상기평문메시지에대한암호문을생성하는단계; 상기메시지암호화부가상기평문메시지를수신하고자하는사용자단말의수, 상기헤더및 암호문을포함하는브로드캐스트암호문을생성하여서버부로전송하는단계; 상기사용자단말이수신한비밀키에기초하여공개변환키및 비밀변환키를생성하고, 생성한공개변환키를상기서버부로전송하는단계; 상기서버부가수신한공개변환키를이용하여상기브로드캐스트암호문을부분복호화하고, 부분복호화된브로드캐스트암호문을상기사용자단말로전송하는단계; 및상기사용자단말이수신한부분복호화된브로드캐스트암호문에대하여상기비밀변환키를이용하여전체복호화하여평문메시지를획득하는단계; 를포함한다. 이러한구성에의해, 본발명의브로드캐스트암호화방법및 시스템은겹선형그룹으로부터난수값을선택하여공개변환키및 비밀변환키를생성한후, 이를이용하여암호화된메시지를적은연산량을통해용이하게복호화할수 있는효과가있다.