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公开(公告)号：KR1020140074807A
公开(公告)日：2014-06-18
申请号：KR1020130087369
申请日：2013-07-24
Applicant: 고려대학교 산학협력단
CPC classification number: G06F17/10
Abstract: The present invention suggests a method in which a data mining system performs dot product operation to bit information of each user. Especially, the method includes a step of generating a personal polynomial expression for each user formed of each coefficient set based on the bit information and the highest degree set according to the total number of users and matching a public value shared between the users with a user account of each user by differentiating the public value; a step of adding a random value selected by a first user account to each coefficient of one of personal polynomial expressions or each coefficient of a result polynomial expression generated by totaling up the personal polynomial expressions; a step of collecting the total of a result value of substituting a predetermined public value for each personal polynomial but collecting the total obtained by each public value and permitting to a second user account a process of calculating each coefficient of a recomposition polynomial expression by substituting the collected total and public value to the recomposition polynomial expression composed of the highest degree; and a step of permitting to a third user account a process of checking the number of the same values as a result of dot product operation by comparing each added random value to each calculated coefficient.
Abstract translation: 本发明提出了一种方法，其中数据挖掘系统对每个用户的位信息执行点积运算。 特别地，该方法包括以下步骤：基于比特信息和根据总用户数设置的最高度来为每个系数组形成的每个用户生成个人多项式表达式，并且将用户与用户之间共享的公共值进行匹配 通过区分公共价值对每个用户的账户; 将由第一用户帐户选择的随机值添加到个人多项式表达式之一的每个系数或通过合计个人多项式表达而产生的结果多项式表达式的每个系数的步骤; 收集对于每个个人多项式代替预定公开值的结果值的总和的步骤，但是收集通过每个公开值获得的总和并且允许第二用户帐户计算重新组合多项式表达式的每个系数的处理， 收集总和公共价值到由最高程度组成的重组多项式; 以及通过将每个相加的随机值与每个计算的系数进行比较，允许向第三用户帐户检查作为点积运算的结果的相同值的数量的处理。
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公开(公告)号：KR1020140074806A
公开(公告)日：2014-06-18
申请号：KR1020130086873
申请日：2013-07-23
Applicant: 고려대학교 산학협력단
CPC classification number: G06F19/707
Abstract: Disclosed are a data processing device, a mining performing device, a data stream mining performing method, and a recording medium. Especially, according to an embodiment of the present invention, the data processing device includes: a dummy data generating part generating dummy data; a protection data generating part generating protection data by inserting the dummy data into original data generated by a data processing procedure according to a predetermined reference; and a communications part transmitting the protection data to the mining performing device. In the case above, the protection data generating part generates the protection data to make a result of performing the data stream mining to the protection data same as a result of performing the data stream mining to the original data.
Abstract translation: 公开了一种数据处理装置，挖掘执行装置，数据流挖掘执行方法和记录介质。 特别地，根据本发明的实施例，数据处理装置包括：伪数据生成部，生成伪数据; 保护数据产生部分，通过根据预定的参考将伪数据插入由数据处理过程产生的原始数据中，产生保护数据; 以及将保护数据发送到挖掘执行装置的通信部分。 在上述情况下，保护数据生成部分生成保护数据，以便对作为对原始数据执行数据流挖掘的结果的相同的保护数据进行数据流挖掘的结果。
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公开(公告)号：KR101382628B1
公开(公告)日：2014-04-07
申请号：KR1020120045084
申请日：2012-04-30
Applicant: 고려대학교 산학협력단
Abstract: 본 발명은 순서가 있는 데이터를 암호화하는 방법에 있어서, (a) 전체 평문 후보 구간을 임의의 크기로 확장하여 전체 암호문 후보 구간을 설정하고, 상기 전체 암호문 후보 구간을 임의 크기의, 서로 교집합을 갖지 않는 분할된 암호문 후보 구간들로 분할한 후, 각 평문 후보 데이터를 상기 각 분할된 암호문 후보 구간에 순서대로 대응(mapping)시켜 암호화 키를 생성하는 단계; 및 (b) 상기 암호화 키를 사용하여, 주어진 평문 데이터에 대응하는 분할된 암호문 후보 구간을 찾은 후, 상기 분할된 암호문 후보 구간에 속하는 임의의 암호문 후보 데이터를 암호문 데이터로 산출하여 상기 주어진 평문 데이터를 암호화하는 단계;를 포함하는 데이터 암호화 방법을 제공한다.
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公开(公告)号：KR1020130126825A
公开(公告)日：2013-11-21
申请号：KR1020120045084
申请日：2012-04-30
Applicant: 고려대학교 산학협력단
CPC classification number: G06F21/6209 , G06F17/30002
Abstract: The present invention provides a data encoding method including (a) a step of generating an encoding key by mapping each clear text candidate data with each divided encoded text candidate section in order after setting the whole encoded text candidate section by expanding the whole clear text candidate section and dividing the whole encoded text candidate section into encoded text candidate sections having random sizes and (b) a step of encoding clear text data by calculating encoded text candidate data included in each divided encoded text candidate section as encoded text data after finding a divided encoded text candidate section corresponding to the clear text data by using the encoding key. [Reference numerals] (S210) Generating an encoding key in advance: Mapping each clear text section with encoded text section;(S220) Encoding data being inputted into a database: Selecting a certain point within an encoding section corresponding to a selected clear text and creating an encoded text;(S230) Decoding data being outputted from the data: Finding a corresponding clear text only using information about the section to which the selected encoded text belongs
Abstract translation: 本发明提供一种数据编码方法，包括：（a）通过扩展整个清晰文本候选者，在设置整个编码文本候选部分之后依次映射每个分离的编码文本候选部分的每个明文候选数据，生成编码密钥的步骤 并且将整个编码文本候选部分划分成具有随机大小的编码文本候选部分，以及（b）通过在分割后的编码文本候选部分中包含的编码文本候选数据中计算出的编码文本候选数据作为编码文本数据， 通过使用编码密钥对应于明文数据的编码文本候选部分。 （S210）预先生成编码密钥：将每个明文部分与编码文本部分对齐;（S220）输入到数据库的编码数据：选择对应于所选明文的编码部分内的某一点， 创建编码文本;（S230）对从数据输出的数据进行解码：仅使用关于所选编码文本所属部分的信息来找到对应的明文
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公开(公告)号：KR101264286B1
公开(公告)日：2013-05-22
申请号：KR1020120004367
申请日：2012-01-13
Applicant: 고려대학교 산학협력단
CPC classification number: G06F21/6227 , H04L9/0656 , H04L9/0869
Abstract: PURPOSE: A database encryption system and a method thereof are provided to improve the stability of the system by using a symmetric-key based sequence-preserving encryption technique. CONSTITUTION: A database encryption system(10) uses a symmetric-key based sequence-preserving encryption technique. An encryption part(200) encrypts plain text data which is stored in a database(100) and produces encrypted text data. A decryption part(300) decrypts the encrypted text data stored in the database and produces plain text data. A key generation part(400) generates an encryption key used in the encryption part and the decryption part. The key generation part generates the encryption key by mapping the divided section of a plain text onto the divided section of an encrypted text at a random rate. [Reference numerals] (10) Database encryption system; (100) Database; (200) Encryption part; (300) Decryption part; (400) Key generation part
Abstract translation: 目的：提供数据库加密系统及其方法，以通过使用基于对称密钥的序列保存加密技术来提高系统的稳定性。 构成：数据库加密系统（10）使用基于对称密钥的序列保存加密技术。 加密部件（200）对存储在数据库（100）中的明文数据进行加密，生成加密的文本数据。 解密部分（300）解密存储在数据库中的加密文本数据并产生明文数据。 密钥生成部分（400）生成在加密部分和解密部分中使用的加密密钥。 密钥生成部分通过将纯文本的划分部分以随机速率映射到加密文本的划分部分来生成加密密钥。 （附图标记）（10）数据库加密系统; （100）数据库; （200）加密部分; （300）解密部分; （400）密钥生成部分
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Patent Agency Ranking
公开(公告)号：KR101586439B1
公开(公告)日：2016-01-18
申请号：KR1020140114172
申请日：2014-08-29
Applicant: 고려대학교 산학협력단
Abstract: 프라이버시를보장하는사용자데이터의무결성검증방법이개시된다. 본발명의프라이버시를보장하는사용자데이터의무결성검증방법은프라이버시가보장된사용자데이터무결성검증에필요한파라미터들을생성하는단계; 상기제1 단말이상기파라미터생성단계에서생성된파라미터및 암호학적으로안전한해쉬함수에기초하여업로드할데이터파일을암호화한후 데이터저장서버에업로드하는데이터아웃소싱단계; 상기데이터저장서버가상기파라미터생성단계에서생성된파라미터에기초하여업로드된데이터의정당성을검증하는단계; 상기제2 단말이상기업로드된데이터파일일부에대한챌린지(challenge)값을생성하는단계; 상기데이터저장서버가상기제2 단말로부터상기챌린지값을수신하고, 상기파라미터생성단계에서생성된파라미터및 상기챌린지값에기초하여증명값을생성하는단계; 및상기제2 단말이상기증명값(proof)과공개키들을이용하여상기증명값(proof)의정당성을검증하는단계를포함한다.
Abstract translation: 公开了用于确保隐私的用户数据完整性验证方法。 本发明的方法包括：通过隐私确保用户数据完整性验证所需的参数的步骤; 数据外包步骤，根据在参数生成步骤中生成的参数，使第一终端对要上传的数据文件进行加密，以及加密安全散列函数，并将数据文件上传到数据存储服务器; 数据存储服务器测试的步骤基于在参数生成步骤中生成的参数来检查上传的数据的有效性; 使所述第二终端相对于上传的数据文件的一部分生成挑战值的步骤; 使所述数据存储服务器从所述第二终端接收到所述挑战值的步骤，并且基于在所述参数生成步骤中生成的参数和所述挑战值来生成验证值; 以及通过使用证明值和公开密钥来使第二终端检查证明值的有效性的步骤。
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17.发明授权공모 공격으로부터 안전한 클라이언트 인증 방법 및 클라이언트 인증 서버, 클라우드 서버, 클라이언트 인증 시스템 有权客户端验证方法，客户端认证服务器，云服务器，用于阻止共谋攻击的客户端认证系统
公开(公告)号：KR101537997B1
公开(公告)日：2015-07-22
申请号：KR1020140000872
申请日：2014-01-03
Applicant: 고려대학교 산학협력단
IPC: H04L9/32
Abstract: 공모공격으로부터안전한클라우드컴퓨팅기반의클라이언트인증을수행하는방법이개시된다. 본발명의일 실시예에따른클라이언트인증방법은기 등록된클라이언트들에대한참조식별정보및 새롭게생성된복수의난수들에기초하여, 암호화된참조식별정보 Ci, 인증용비밀값 CR 및상기참조식별정보에대한인덱스정보 Ii를생성하여상기클라우드서버에게전송하는인증준비단계; 임의의클라이언트로부터클라이언트인증정보가수신되면, 상기클라이언트인증정보및 상기복수의난수들중 일부와추가로생성된난수들에기초하여암호화된식별요청정보 CF를생성하여상기클라우드서버에게전송하는인증요청단계; 및상기클라우드서버로부터상기 CF, 상기 Ci 및상기 CR을이용한연산결과의최소값에대응되는 Ii를수신하여상기임의의클라이언트에대한인증을수행하는인증단계를포함한다.
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18.发明公开
公开(公告)号：KR1020150081167A
公开(公告)日：2015-07-13
申请号：KR1020140000872
申请日：2014-01-03
Applicant: 고려대학교 산학협력단
IPC: H04L9/32
Abstract: 공모공격으로부터안전한클라우드컴퓨팅기반의클라이언트인증을수행하는방법이개시된다. 본발명의일 실시예에따른클라이언트인증방법은기 등록된클라이언트들에대한참조식별정보및 새롭게생성된복수의난수들에기초하여, 암호화된참조식별정보 Ci, 인증용비밀값 CR 및상기참조식별정보에대한인덱스정보 Ii를생성하여상기클라우드서버에게전송하는인증준비단계; 임의의클라이언트로부터클라이언트인증정보가수신되면, 상기클라이언트인증정보및 상기복수의난수들중 일부와추가로생성된난수들에기초하여암호화된식별요청정보 CF를생성하여상기클라우드서버에게전송하는인증요청단계; 및상기클라우드서버로부터상기 CF, 상기 Ci 및상기 CR을이용한연산결과의최소값에대응되는 Ii를수신하여상기임의의클라이언트에대한인증을수행하는인증단계를포함한다.
Abstract translation: 公开了一种基于计算的客户端认证方法，避免了串通攻击。 根据本发明的实施例的客户端认证方法包括：基于用于预定义的参考识别信息，生成加密参考标识信息Ci，认证用秘密值CR和参考识别信息的索引信息Ii的认证准备步骤， 注册客户端和新生成的多个随机数，然后将其发送到客户端服务器; 认证请求步骤，在从随机客户端接收到客户端认证信息时，基于客户端认证信息和多个随机数中的一些以及新生成的随机数生成加密识别请求信息CF，然后发送给客户端服务器 ; 以及认证步骤，通过使用从云服务器发送的CF，Ci和CR，然后对随机客户机进行认证，接收对应于计算结果的最小值的Ii。
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公开(公告)号：KR1020130024144A
公开(公告)日：2013-03-08
申请号：KR1020110087400
申请日：2011-08-30
Applicant: 고려대학교 산학협력단
CPC classification number: G06F17/30616 , G06F17/30663 , G06F21/602
Abstract: PURPOSE: A keyword searching method based on a weighted value and an apparatus thereof are provided to improve the accuracy of a searching result by executing a keyword searching for an encoded document by calculating high similarity. CONSTITUTION: A search token generating module(110) generates a search token by transforming information for a search keyword including a weighted value by confirming the weighted value according to information for the search keyword. A query and response receiving module(120) transmits a query message including the search token and decodes an encrypted document received as a search result. A verification module(130) verifies the justification of the search result by using the search token and information for a keyword included in a document extracted from the encrypted document. [Reference numerals] (110) Search token generating module; (120) Query and response receiving module; (130) Verification module; (200) Server; (AA) Search keyword; (BB) Weighted value
Abstract translation: 目的：提供一种基于加权值的关键词搜索方法及其装置，以通过计算高相似度执行关键字搜索编码文档来提高搜索结果的准确性。 构成：搜索令牌生成模块（110）通过根据搜索关键字的信息确认加权值来变换包括加权值的搜索关键字的信息来生成搜索令牌。 查询和响应接收模块（120）发送包括搜索令牌的查询消息，并解码作为搜索结果接收到的加密文档。 验证模块（130）通过使用搜索令牌和包含在从加密文档中提取的文档中的关键字的信息来验证搜索结果的正当性。 （附图标记）（110）搜索令牌生成模块; （120）查询和响应接收模块; （130）验证模块; （200）服务器; （AA）搜索关键字; （BB）加权值
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公开(公告)号：KR1020170073001A
公开(公告)日：2017-06-28
申请号：KR1020150181126
申请日：2015-12-17
Applicant: 고려대학교 산학협력단
Abstract: 인증및 키공유방법이개시된다. 상기인증및 키공유방법은서버에서수행되고, 단말기로부터등록요청메시지를수신하는단계, 상기단말기의사용자를등록하는단계, 상기단말기로부터인증요청메시지를수신하는단계, 상기사용자를인증하고세션키를생성하는단계, 및상기단말기로응답값을송신하는단계를포함한다.
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