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1. 发明申请

WO2012132910A1 Method and Server for Evaluating a Probability of an Observation Sequence Stored at a Client with respect to a Hidden Markov Model (HMM) Stored at a Server 审中-公开
标题翻译：用于评估存储在服务器上的客户端相对于存储在服务器上的隐马尔可夫模型（HMM）的观察顺序的概率的方法和服务器
公开(公告)号：WO2012132910A1
公开(公告)日：2012-10-04
申请号：PCT/JP2012/056608
申请日：2012-03-08
申请人： MITSUBISHI ELECTRIC CORPORATION , MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. , RANE, Shantanu , SUN, Wei , PATHAK, Manas, A. , RAJ, Bhiksha
发明人： RANE, Shantanu , SUN, Wei , PATHAK, Manas, A. , RAJ, Bhiksha
IPC分类号： H04L9/00 , G09C1/00
CPC分类号： H04L9/008 , G06N7/005 , H04L2209/46
摘要： A probability of an observation sequence stored at a client is evaluated securely with respect to a hidden Markov model (HMM) stored at a server. The server determines, for each state of the HMM, an encryption of a log-probability of a current element of the observation sequence. Determines, for each state, an encryption of a log-summation of a product of a likelihood of the observation sequence based on a previous element of the observation sequence and a transition probability to each state. Determines an encryption of a log-likelihood of the observation sequence for each state as a product of the encryption of a log-summation and an encryption of a corresponding log-probability of the current element of the observation sequence. Determines an encryption of the log-probability of the observation sequence based on the log-likelihood of the observation sequence for each state.
摘要翻译：相对于存储在服务器中的隐马尔可夫模型（HMM），安全地评估存储在客户端的观察序列的概率。对于HMM的每个状态，服务器确定观察序列的当前元素的对数概率的加密。为每个状态确定基于观察序列的先前元素的观察序列的可能性与每个状态的转移概率的乘积的对数求和的加密。确定对每个状态的观察序列的对数似然性的加密，作为对数求和的加密和观察序列的当前元素的相应对数概率的加密的乘积。基于每个状态的观察序列的对数似然，确定观测序列的对数概率的加密。

2. 发明申请

WO2012133601A1 PRIVACY-PRESERVING PROBABILISTIC INFERENCE BASED ON HIDDEN MARKOV MODELS 审中-公开
标题翻译：基于隐藏MARKOV模型的隐私保护概率
公开(公告)号：WO2012133601A1
公开(公告)日：2012-10-04
申请号：PCT/JP2012/058278
申请日：2012-03-21
申请人： MITSUBISHI ELECTRIC CORPORATION , MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. , SUN, Wei , RANE, Shantanu
发明人： SUN, Wei , RANE, Shantanu
IPC分类号： G10L15/14 , G10L15/28 , H04K1/00 , H04L9/00
CPC分类号： G10L15/30 , G10L15/142 , G10L25/24 , H04L9/008 , H04L2209/46
摘要： Parameters of a hidden Markov model (HMM) are determined by a server based on an observation sequence stored at a client, wherein the client has a decryption key and an encryption key of an additively homomorphic cryptosystem, and the server has only the encryption key. The server initializes parameters of the HMM and updates the parameters iteratively until a difference between a probability of the observation sequence of a current iteration and a probability of the observation sequence of a previous iteration is above a threshold, wherein, for each iteration, the parameters are updated based on an encrypted conditional joint probability of each pair of states given the observation sequence and the parameters of the HMM, wherein the encrypted conditional probability is determining in an encrypted domain using a secure multiparty computation (SMC) between the server and the client.
摘要翻译：隐马尔可夫模型（HMM）的参数由服务器基于存储在客户端的观察序列确定，其中客户端具有加密同态密码系统的解密密钥和加密密钥，并且服务器仅具有加密密钥。服务器初始化HMM的参数并重复更新参数，直到当前迭代的观察序列的概率与先前迭代的观察序列的概率之间的差异高于阈值，其中，对于每次迭代，参数基于给定观察序列和HMM的参数的每对状态的加密条件联合概率来更新，其中加密的条件概率是使用服务器和客户端之间的安全多方计算（SMC）在加密域中确定的。

3. 发明申请

WO2013046808A1 METHOD FOR DECODING PICTURE IN FORM OF BIT-STREAM 审中-公开
标题翻译：用于解码位图形式的图像的方法
公开(公告)号：WO2013046808A1
公开(公告)日：2013-04-04
申请号：PCT/JP2012/064492
申请日：2012-05-30
申请人： MITSUBISHI ELECTRIC CORPORATION , COHEN, Robert A. , RANE, Shantanu , VETRO, Anthony , SUN, Huifang
发明人： COHEN, Robert A. , RANE, Shantanu , VETRO, Anthony , SUN, Huifang
IPC分类号： H04N7/26
CPC分类号： H04N19/467 , H04N19/18 , H04N19/196 , H04N19/463 , H04N19/48 , H04N19/61 , H04N19/70
摘要： A method decodes a picture in a form of a bit-stream. The picture is encoded and represented by vectors of coefficients. Each coefficient is in a quantized form. A specific coefficient is selected in each vector based on a scan order of the vector. Then, a set of modes is inferred based on characteristics of the specific coefficient. Subsequently, the bit-stream is decoded according to the set of modes.
摘要翻译：一种方法以比特流的形式对图像进行解码。图像被编码并由系数矢量表示。每个系数都是量化的形式。基于向量的扫描顺序在每个向量中选择特定系数。然后，基于特定系数的特征推断出一组模式。随后，根据模式集合解码比特流。

4. 发明申请

WO2015186646A1 SYSTEM AND METHOD FOR PAIRWISE DISTANCE COMPUTATION 审中-公开
标题翻译：用于配对距离计算的系统和方法
公开(公告)号：WO2015186646A1
公开(公告)日：2015-12-10
申请号：PCT/JP2015/065706
申请日：2015-05-26
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： BOUFOUNOS, Petros, T. , RANE, Shantanu
IPC分类号： G06F17/10 , H04L9/00
CPC分类号： G06F17/10 , G06K9/00536 , G06K9/6215 , G09C1/00 , H04L9/008 , H04L2209/80 , H04W12/08
摘要： A pairwise distance computation transforms first and second signals using an absolute distance preserving mapping, such that a k-norm distance between the first mapped signal and the second mapped signal represents an absolute distance between the first signal and the second signal. The absolute distance preserving mapping maps an element of a first or a second signal to a vector having a size equal to a cardinality of the finite alphabet of the signals. The absolute distance preserving mapping determines a position N of the element in an ordered sequence of symbols of the finite alphabet and determines values for each of N elements of the vector as a fractional power 1/k of positive increments in the finite alphabet. The values for subsequent elements of the vector are determined as zero.
摘要翻译：成对距离计算使用绝对距离保持映射来变换第一和第二信号，使得第一映射信号和第二映射信号之间的k-范数距离表示第一信号和第二信号之间的绝对距离。绝对距离保持映射将第一或第二信号的元素映射到具有等于信号的有限字母表的基数的大小的向量。绝对距离保持映射确定有限字母表的有序符号序列中的元素的位置N，并且确定矢量的N个元素中的每一个的值作为有限字母表中的正增量的分数幂1 / k。向量的后续元素的值被确定为零。

5. 发明申请

WO2015068642A1 METHOD FOR CLASSIFYING DATA TO DETERMINE HIDDEN STATES OF SYSTEM WHILE PRESERVING PRIVACY 审中-公开
标题翻译：分类数据以确定保护隐私的系统隐藏状态的方法
公开(公告)号：WO2015068642A1
公开(公告)日：2015-05-14
申请号：PCT/JP2014/079008
申请日：2014-10-27
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： WANG, Ye , XIE, Qian , RANE, Shantanu
IPC分类号： G06F21/62 , G06K9/62 , G06F17/30
CPC分类号： H04L67/02 , G06F17/30539 , G06F21/6245 , G06K9/6297 , G06K2009/00953
摘要： A method classifies data to determine hidden states of a system, by first randomly permuting the data and inserting client to generate private data. A server classifies the private data according to a hidden Markov model (HMM) to obtain permuted noisy estimates of the states and the chaff, which are returned to the client. The client then removes the chaff, inverts the permuted noisy estimates to obtain unpermuted noisy estimates of the states.
摘要翻译：一种方法是通过首先随机排列数据并插入客户端以生成私有数据来对数据进行分类以确定系统的隐藏状态。服务器根据隐马尔可夫模型（HMM）对私有数据进行分类，以获得返回给客户端的状态和谷壳的置换噪声估计。然后，客户端删除谷壳，反转了置换的噪声估计值，以获得不受限制的状态噪声估计。

6. 发明申请

WO2014119170A1 METHOD FOR ENCODING INPUT SEGMENT OF INPUT VIDEO 审中-公开
标题翻译：编码输入视频输入分段的方法
公开(公告)号：WO2014119170A1
公开(公告)日：2014-08-07
申请号：PCT/JP2013/084170
申请日：2013-12-13
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： TIAN, Dong , VETRO, Anthony , RANE, Shantanu
IPC分类号： H04N19/51 , H04N19/54
CPC分类号： H04N19/134 , H04N19/54 , H04N19/573
摘要： An input segment of an input video is encoded by first extracting and storing, for each segment of previously encoded videos, a set of reference features. The set of input features are matched with each set of the reference features to produce a set of scores. The reference segments having largest scores are selected to produce a first reduced set of reference segments. A rate-distortion cost for each reference segment in the first reduced set of reference segments is estimated. The reference segments in the first reduced set of reference segments is selected to produce a second reduced set of reference segments. Then, the input segment are encoded based on second reduced set of reference segments.
摘要翻译：通过首先对先前编码的视频的每个段提取和存储一组参考特征来编码输入视频的输入段。输入特征的集合与每组参考特征相匹配以产生一组分数。选择具有最大分数的参考分段以产生第一缩减的参考分组集合。估计第一组缩减的参考段中每个参考段的速率失真成本。选择第一缩减的参考段集合中的参考段以产生第二缩减的参考段集合。然后，基于第二缩减的参考片段编码输入片段。

7. 发明申请

WO2014142042A1 METHOD FOR AUTHENTICATING ENCRYPTION AND SYSTEM FOR AUTHENTICATING BIOMETRIC DATA 审中-公开
标题翻译：用于认证加密的方法和用于认证生物量数据的系统
公开(公告)号：WO2014142042A1
公开(公告)日：2014-09-18
申请号：PCT/JP2014/056086
申请日：2014-03-04
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： RANE, Shantanu , ITO, Takashi
IPC分类号： H04L9/00 , H04L9/32
CPC分类号： G06F21/32 , H04L9/008 , H04L9/3231
摘要： A method authenticates an encryption of a probe vector of biometric data based on an encryption of an enrolment vector of the biometric data using consistency of discriminative elements of the biometric data. The method determines an encryption of a first distance between discriminative elements of an enrolment vector stored at a server and a probe vector presented for an authentication. The method also determines an encryption of a second distance between discriminative elements of a first consistency vector stored at the server and a second consistency vector presented for the authentication. Next, the biometric data is authenticated based on encryptions of the first and the second distances.
摘要翻译：一种方法使用生物特征数据的识别元素的一致性，基于生物特征数据的登记向量的加密来验证生物特征数据的探测向量的加密。该方法确定存储在服务器的登记向量的识别元素与呈现给认证的探测向量之间的第一距离的加密。该方法还确定存储在服务器处的第一一致性向量的辨别元素与呈现给认证的第二一致性向量之间的第二距离的加密。接下来，基于第一和第二距离的加密来认证生物特征数据。

8. 发明公开

EP2692082A1 METHOD AND SERVER FOR EVALUATING A PROBABILITY OF AN OBSERVATION SEQUENCE STORED AT A CLIENT WITH RESPECT TO A HIDDEN MARKOV MODEL (HMM) STORED AT A SERVER 审中-公开
标题翻译：用于评估客户端的可能性的方法和服务器存储存储的影响的监测相对于每个服务器端的存储隐马尔可夫模型
公开(公告)号：EP2692082A1
公开(公告)日：2014-02-05
申请号：EP12711286.0
申请日：2012-03-08
申请人： Mitsubishi Electric Corporation
发明人： RANE, Shantanu , SUN, Wei , PATHAK, Manas, A. , RAJ, Bhiksha
IPC分类号： H04L9/00 , G09C1/00
CPC分类号： H04L9/008 , G06N7/005 , H04L2209/46
摘要： A probability of an observation sequence stored at a client is evaluated securely with respect to a hidden Markov model (HMM) stored at a server. The server determines, for each state of the HMM, an encryption of a log-probability of a current element of the observation sequence. Determines, for each state, an encryption of a log-summation of a product of a likelihood of the observation sequence based on a previous element of the observation sequence and a transition probability to each state. Determines an encryption of a log-likelihood of the observation sequence for each state as a product of the encryption of a log-summation and an encryption of a corresponding log-probability of the current element of the observation sequence. Determines an encryption of the log-probability of the observation sequence based on the log-likelihood of the observation sequence for each state.

9. 发明公开

EP2974112A1 METHOD FOR AUTHENTICATING ENCRYPTION AND SYSTEM FOR AUTHENTICATING BIOMETRIC DATA 审中-公开
标题翻译：对于身份验证和加密系统的方法进行验证生物特征数据
公开(公告)号：EP2974112A1
公开(公告)日：2016-01-20
申请号：EP14715132.8
申请日：2014-03-04
申请人： Mitsubishi Electric Corporation
发明人： RANE, Shantanu , ITO, Takashi
IPC分类号： H04L9/00 , H04L9/32
CPC分类号： G06F21/32 , H04L9/008 , H04L9/3231
摘要： A method authenticates an encryption of a probe vector of biometric data based on an encryption of an enrollment vector of the biometric data using consistency of discriminative elements of the biometric data. The method determines an encryption of a first distance between discriminative elements of an enrollment vector stored at a server and a probe vector presented for an authentication. The method also determines an encryption of a second distance between discriminative elements of a first consistency vector stored at the server and a second consistency vector presented for the authentication. Next, the biometric data is authenticated based on encryptions of the first and the second distances.

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