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公开(公告)号：KR101780774B1
公开(公告)日：2017-10-10
申请号：KR1020100132589
申请日：2010-12-22
Applicant: 한국전자통신연구원
Abstract: 본발명은제어가능연결성을제공하는그룹서명기법에있어서, 기존에알려진기법들과같은선택평문공격(Chosen Plaintext Attacks, CPA)에안전한익명성을제공하지만서명길이가매우짧은 2가지기법과, 기존에알려진기법보다더 강한익명성, 즉선택암호문공격(Chosen Ciphertext Attacks, CCA)에안전한익명성을제공하는기법을적용하여다양한수준으로익명성을제어하면서도짧은서명값을출력하여다양한익명성기반의응용환경에서폭넓게적용할수 있다.
Abstract translation: 本发明涉及一组签名方案，提供了一个可控制的连接，提供了一个安全的匿名选择明文攻击，如公知技术（选择明文攻击，CPA），但签名长度很短的两种技术，和现有 比已知的技术更强的匿名性，通过应用提供了一个安全的匿名至（选择密文攻击，CCA）输出短签名值的技术，即选择的密文攻击，而各级基于匿名-各种的匿名性控制 适用于广泛的应用。
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公开(公告)号：KR101744748B1
公开(公告)日：2017-06-09
申请号：KR1020110000935
申请日：2011-01-05
Applicant: 한국전자통신연구원
CPC classification number: H04L9/0618 , H04L9/0869 , H04L2209/16
Abstract: 본발명은화이트박스암호테이블을이용한콘텐츠보호장치, 콘텐츠암호화및 복호화장치에관한것이다. 이러한장치들에적용되는본 발명의실시예에따른콘텐츠보호장치는랜덤넘버를발생시키는랜덤넘버발생부와, 랜덤넘버와사용자로부터제공받은사용자정보를암호화하여암호화된출력값을출력하는화이트박스암호테이블과, 암호화된출력값과외부로부터입력되는데이터를연산하여데이터를암호화하거나복호화하여출력하는연산부를포함한다.
Abstract translation: 内容保护装置和内容加密解密装置本发明涉及一种使用白盒加密表的内容保护装置和内容加密解密装置。 根据本发明适用于这样的装置的一个实施例的内容保护设备是白盒代码表用于通过用于产生随机数加密该随机数生成部输出一个加密的输出值，和从随机数接收与该用户的用户信息 以及运算单元，用于计算加密输出值和从外部输入的数据，以加密或解密数据并输出数据。
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公开(公告)号：KR101407945B1
公开(公告)日：2014-06-17
申请号：KR1020100104585
申请日：2010-10-26
Applicant: 한국전자통신연구원
Abstract: 본 발명은 부분 연결성을 제공하는 익명 서비스 방법에 관한 것으로, 서비스단말이 익명인증서버와 상호 협력하여 서비스 이용자의 그룹서명 비밀키를 획득하는 서비스 이용자 가입 과정; 서비스제공서버가 익명ID확인서버와 상호 협력하여 서비스제공자의 부분 연결용 공개키(LL 공개키) 및 비밀키(LL 비밀키) 쌍을 획득하는 서비스제공서버 가입 과정; 상기 서비스단말이 상기 서비스제공서버로부터 상기 LL 공개키를 제공받고, 그룹 공개키와 상기 LL 공개키, 상기 그룹서명 비밀키를 기반으로 하여 상기 서비스 이용자의 그룹서명을 생성하는 그룹서명 생성과정; 상기 서비스 제공서버가 상기 그룹 공개키와 상기 LL 공개키를 이용하여 상기 그룹서명의 유효 여부를 검증하는 그룹서명 검증과정; 상기 익명ID확인서버가 상기 그룹서명으로부터 익명ID를 계산한 후, 상기 익명인증서버와 상호 협력하여 상기 익명ID를 가지는 서비스 이용자를 확인하는 서명자 확인 과정; 및 상기 서비스제공서버가 상기 LL 비밀키를 통해 상기 그룹서명으로부터 상기 서비스 이용자의 가상인덱스를 획득하여, 상기 서비스 이용자의 부분 연결성을 확보하는 부분 연결 과정을 포함할 수 있다.
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公开(公告)号：KR1020110066669A
公开(公告)日：2011-06-17
申请号：KR1020090123413
申请日：2009-12-11
Applicant: 한국전자통신연구원
IPC: H04N5/913
CPC classification number: H04N21/8358 , G06T1/0028 , G06T1/005 , G06T2201/0065
Abstract: PURPOSE: A video watermark insertion device, system and method for evaluating a watermarking algorithm using the same are provided to quantitively measure toughness performance of an watermark algorithm. CONSTITUTION: A watermark inserting unit(110) inserts a watermark including user information into a video content. According to deformation kind and intensity of video, a video transforming unit(120) performs video deformation about the content. A watermark detecting unit(130) detects watermark from a watermarked content. The water mark detecting unit outputs roughness information of a watermarking algorithm.
Abstract translation: 目的：提供一种用于评估使用其的水印算法的视频水印插入装置，系统和方法，以定量测量水印算法的韧性。 构成：水印插入单元（110）将包含用户信息的水印插入到视频内容中。 根据视频的变形类型和强度，视频变换单元（120）对内容进行视频变形。 水印检测单元（130）从加水印的内容中检测水印。 水印检测单元输出水印算法的粗糙度信息。
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公开(公告)号：KR1020120069447A
公开(公告)日：2012-06-28
申请号：KR1020100131001
申请日：2010-12-20
Applicant: 한국전자통신연구원
CPC classification number: H04L9/321 , H04L9/0891 , H04L9/3255 , H04L2209/42
Abstract: PURPOSE: A method for verifying key validity and a sever for performing the same are provided to reduce necessary operation times for verifying key validity in a signature process or a signature verification process by providing various services based on anonymous authentication. CONSTITUTION: An anonymous authentication server(110) revokes an anonymous secret key owned currently(S810). The anonymous authentication server is opened by generating a revocation list(S820). A service providing server(120) generates a LRL(Local Revocation List) by using a revocation list and its own LL secret key(S830). The service providing server calculates a virtual index of a service user through the signature of a service user(S840). The service providing server verifies the validity of a key of the service user based on the presence of the virtual index included in the local revocation list(S850).
Abstract translation: 目的：提供一种用于验证密钥有效性的方法和用于执行密钥有效性的服务器，以通过基于匿名认证提供各种服务来减少用于验证签名过程或签名验证过程中的密钥有效性的必要操作时间。 构成：匿名认证服务器（110）撤销当前拥有的匿名密钥（S810）。 通过生成撤销列表来打开匿名认证服务器（S820）。 服务提供服务器（120）通过使用撤销列表和其自己的LL秘密密钥生成LRL（本地撤销列表）（S830）。 服务提供服务器通过服务用户的签名来计算服务用户的虚拟索引（S840）。 服务提供服务器基于本地撤销列表中包括的虚拟索引的存在来验证服务用户的密钥的有效性（S850）。
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Patent Agency Ranking6.发明公开
公开(公告)号：KR1020120058902A
公开(公告)日：2012-06-08
申请号：KR1020100120427
申请日：2010-11-30
Applicant: 한국전자통신연구원
IPC: H04L9/32
Abstract: PURPOSE: A system and a method for managing client information and a client terminal and an apparatus for managing the client information are provided to manage corresponding information by using an authentication element and an encryption key. CONSTITUTION: A system for managing client information comprises a client terminal group(100), a network(200), a client information management apparatus(300). The client terminal group requests subscription and authentication by using an authentication element and an encryption key. The network connects the client terminal group with the client information management apparatus. The network includes a broadband communication network and a local area network, etc. The client information management apparatus manages client information in an encrypted type.
Abstract translation: 目的：提供一种用于管理客户端信息的系统和方法以及客户终端和用于管理客户端信息的装置，以通过使用认证元件和加密密钥来管理相应的信息。 构成：用于管理客户信息的系统包括客户终端组（100），网络（200），客户端信息管理装置（300）。 客户终端组通过使用认证元素和加密密钥来请求订阅和认证。 网络将客户终端组与客户端信息管理装置连接起来。 网络包括宽带通信网络和局域网等。客户端信息管理装置以加密方式管理客户端信息。
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公开(公告)号：KR1020120051234A
公开(公告)日：2012-05-22
申请号：KR1020100112573
申请日：2010-11-12
Applicant: 한국전자통신연구원
IPC: G06Q50/10 , H04N21/4623 , H04N21/4627 , G06F21/10 , G06Q30/06
CPC classification number: G06Q50/10 , G06F21/10 , G06Q30/06 , H04N21/4623 , H04N21/4627
Abstract: PURPOSE: A content management method, system, and rights object management apparatus are provided to prohibit illegal usage for content by enabling a user who has rights for releasing rights object to use content through a mobile storage apparatus. CONSTITUTION: A content playback apparatus receives content from a content service providing apparatus(S504). A rights object management apparatus receives binding rights objects from a content service providing apparatus(S506). When the content playback apparatus requests the rights objects of the content to the rights object management apparatus, the right object management apparatus release the binding of the binding rights objects. The released binding rights objects are loaded on the content playback apparatus(S514).
Abstract translation: 目的：提供内容管理方法，系统和权限对象管理装置，通过使具有释放权利对象的权限的用户通过移动存储装置使用内容来禁止非法使用内容。 内容回放装置从内容服务提供装置接收内容（S504）。 权限对象管理装置从内容服务提供装置接收绑定对象对象（S506）。 当内容回放装置向权利对象管理装置请求内容的权利对象时，右对象管理装置释放绑定对象的绑定。 释放的绑定权限对象被加载到内容播放装置上（S514）。
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公开(公告)号：KR1020120042469A
公开(公告)日：2012-05-03
申请号：KR1020100104173
申请日：2010-10-25
Applicant: 한국전자통신연구원
CPC classification number: H04L9/08 , G06F21/10 , G06F2221/0755 , H04L2209/16 , H04L2209/603
Abstract: PURPOSE: A content protection device and a method thereof through combination between additional information and encoding key are provided to prevent decoding of additional information by changing an encoded key when changing additional information. CONSTITUTION: An encoding unit(150) generates an encoding key for encoding requested data and generates encoded data. An additional information managing unit(170) manages additional information including right information about the encoded data. A white box password processing unit(160) generates a white box password table for combining the encoded key and the additional information. A combined data generating unit(180) generates combined data for combining additional information through encoding of the white box encoding table.
Abstract translation: 目的：通过附加信息和编码密钥之间的组合来提供内容保护设备及其方法，以防止在更改附加信息时改变编码密钥对附加信息进行解码。 构成：编码单元（150）生成用于对所请求数据进行编码的编码密钥并生成编码数据。 附加信息管理单元（170）管理包括关于编码数据的正确信息的附加信息。 白箱密码处理单元（160）生成用于组合编码密钥和附加信息的白盒密码表。 组合数据生成单元（180）通过编码白盒编码表来生成用于组合附加信息的组合数据。
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公开(公告)号：KR1020110070715A
公开(公告)日：2011-06-24
申请号：KR1020100037432
申请日：2010-04-22
Applicant: 한국전자통신연구원
CPC classification number: G06F21/33 , G06Q50/10 , H04L9/006 , H04L9/3263 , H04L63/0421
Abstract: PURPOSE: Personalized service providing system and method are provided to maintain anonymity and to offer personalized service by adding an approval function for supporting personalized service to an authentication function using signature. CONSTITUTION: A service providing server(30) requests an attribute certificate according to service request, confirming the validity of the attribute certificate, and determines the offer of the service. An anonymous authentication server(11) provides the anonymous information of a user in response to request. An attribute issuance server(20) transmits the request for issuing attribute certificate of a user terminal(40) to an anonymous certificate server.
Abstract translation: 目的：提供个性化服务提供系统和方法，以保持匿名性，并通过使用签名将认证功能添加到认证功能来支持个性化服务来提供个性化服务。 构成：服务提供服务器（30）根据服务请求请求属性证书，确认属性证书的有效性，并确定服务提供。 匿名认证服务器（11）响应于请求提供用户的匿名信息。 属性发行服务器（20）向匿名证书服务器发送用户终端（40）的属性证书的发行请求。
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公开(公告)号：KR1020110060433A
公开(公告)日：2011-06-08
申请号：KR1020090117022
申请日：2009-11-30
Applicant: 한국전자통신연구원
Abstract: PURPOSE: An anonymity authentication and qualification verification method is provided to accomplish authentication on the basis of a short group signature scheme offering anonymity. CONSTITUTION: A user terminal(120) selects a random number as a personal key. In case the personal key ownership verification information of the user terminal is effective, a group management server(110) issues a signature key for the user terminal through a master secret key. The group management server issues a qualification certificate for the user terminal through the issued signature key. A service providing server(130) performs authentication and qualification verification for the user terminal.
Abstract translation: 目的：提供匿名认证和鉴定验证方法，以提供匿名的短组签名方案来完成认证。 构成：用户终端（120）选择随机数作为个人密钥。 在用户终端的个人密钥所有权验证信息有效的情况下，组管理服务器（110）通过主秘密密钥发出用户终端的签名密钥。 组管理服务器通过发出的签名密钥向用户终端发出资质证书。 服务提供服务器（130）对用户终端执行验证和鉴定验证。
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