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1. 发明申请

US20130156255A1 METHOD AND SYSTEM FOR PERFORMING TRANSCODING RESISTANT WATERMARKING 有权
标题翻译：用于执行防滑水标记的方法和系统
公开(公告)号：US20130156255A1
公开(公告)日：2013-06-20
申请号：US13325168
申请日：2011-12-14
申请人： Vijayaraghavan Varadharajan , Sagar Joglekar , Rajarathnam Nallusamy , Sanjoy Paul
发明人： Vijayaraghavan Varadharajan , Sagar Joglekar , Rajarathnam Nallusamy , Sanjoy Paul
IPC分类号： G06K9/00
CPC分类号： G06T1/0057 , G06T2201/0053 , H04N1/32144 , H04N1/3216 , H04N19/467 , H04N21/8358
摘要： A method for performing transcoding resistant watermarking of digital media content is provided. The method enables obtaining a plurality of spectral frequency bands of the digital media content. The method further enables calculating an entropy value for each of the plurality of spectral frequency bands. The entropy value quantifies information in each of the plurality of spectral frequency bands. The method further enables selecting a spectral frequency band from amongst the plurality of spectral frequency bands based on the calculation. The selected spectral frequency band has the highest entropy. Furthermore, the method enables inserting a watermark in the selected spectral frequency band of the digital media content.
摘要翻译：提供一种用于执行数字媒体内容的抗转码抗水印的方法。该方法能够获得数字媒体内容的多个频谱频带。该方法还能够计算多个频谱频带中的每一个的熵值。熵值量化多个频谱频带中的每一个中的信息。该方法还能够基于计算从多个频谱频带中选择频谱频带。所选频谱频带具有最高的熵。此外，该方法能够在数字媒体内容的所选频谱频带中插入水印。

2. 发明授权

US08885871B2 Method and system for performing transcoding resistant watermarking 有权
标题翻译：执行转码抗水印的方法和系统
公开(公告)号：US08885871B2
公开(公告)日：2014-11-11
申请号：US13325168
申请日：2011-12-14
申请人： Vijayaraghavan Varadharajan , Sagar Joglekar , Rajarathnam Nallusamy , Sanjoy Paul
发明人： Vijayaraghavan Varadharajan , Sagar Joglekar , Rajarathnam Nallusamy , Sanjoy Paul
IPC分类号： G06K9/00
CPC分类号： G06T1/0057 , G06T2201/0053 , H04N1/32144 , H04N1/3216 , H04N19/467 , H04N21/8358
摘要： A method for performing transcoding resistant watermarking of digital media content is provided. The method enables obtaining a plurality of spectral frequency bands of the digital media content. The method further enables calculating an entropy value for each of the plurality of spectral frequency bands. The entropy value quantifies information in each of the plurality of spectral frequency bands. The method further enables selecting a spectral frequency band from amongst the plurality of spectral frequency bands based on the calculation. The selected spectral frequency band has the highest entropy. Furthermore, the method enables inserting a watermark in the selected spectral frequency band of the digital media content.
摘要翻译：提供一种用于执行数字媒体内容的抗转码抗水印的方法。该方法能够获得数字媒体内容的多个频谱频带。该方法还能够计算多个频谱频带中的每一个的熵值。熵值量化多个频谱频带中的每一个中的信息。该方法还能够基于计算从多个频谱频带中选择频谱频带。所选频谱频带具有最高的熵。此外，该方法能够在数字媒体内容的所选频谱频带中插入水印。

3. 发明申请

US20130259294A1 METHOD, SYSTEM, AND COMPUTER-READABLE MEDIUM FOR EMBEDDING AND EXTRACTING A WATERMARK IN A VIDEO 有权
标题翻译：用于在视频中嵌入和提取水印的方法，系统和计算机可读介质
公开(公告)号：US20130259294A1
公开(公告)日：2013-10-03
申请号：US13532418
申请日：2012-06-25
申请人： Sachin Mehta , Vijayaraghavan Varadharajan , Rajarathnam Nallusamy
发明人： Sachin Mehta , Vijayaraghavan Varadharajan , Rajarathnam Nallusamy
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0061
摘要： The present invention relates to a computer-implemented method, system and computer readable medium for embedding a watermark into a video and extracting a watermark from the original or copy of the watermarked video. The method comprises converting a video frame from RGB color space to YUV color space. Divide a chrominance component into plurality of blocks. Select plurality of blocks based on size of watermark. Associate a pixel in the watermark with selected plurality of blocks. Embed the watermark corresponding to selected plurality of blocks wherein embedding comprises replacing a first pixel value of the block with maximum value of first column of the block if binary value of the corresponding watermark pixel is one or else replace with minimum value. Combine Y component and chrominance components resulting processed YUV video frame and convert it to RGB video frame. Extract the watermark substantially in a reverse process.
摘要翻译：本发明涉及一种计算机实现的方法，系统和计算机可读介质，用于将水印嵌入到视频中并从水印视频的原始或副本中提取水印。该方法包括将视频帧从RGB色彩空间转换为YUV色彩空间。将色度分量划分成多个块。根据水印大小选择多个块。将水印中的像素与所选择的多个块相关联。嵌入与所选择的多个块相对应的水印，其中嵌入包括如果对应的水印像素的二进制值为1或者用最小值替换，则替换该块的第一列的最大值的第一像素值。组合Y分量和色度分量，生成经处理的YUV视频帧，并将其转换为RGB视频帧。基本上以相反的过程提取水印。

4. 发明授权

US09218638B2 Method, system, and computer-readable medium for embedding and extracting a watermark in a video 有权
标题翻译：用于在视频中嵌入和提取水印的方法，系统和计算机可读介质
公开(公告)号：US09218638B2
公开(公告)日：2015-12-22
申请号：US13532418
申请日：2012-06-25
申请人： Sachin Mehta , Vijayaraghavan Varadharajan , Rajarathnam Nallusamy
发明人： Sachin Mehta , Vijayaraghavan Varadharajan , Rajarathnam Nallusamy
IPC分类号： G06K9/00 , G06T1/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0061
摘要： The present invention relates to a computer-implemented method, system and computer readable medium for embedding a watermark into a video and extracting a watermark from the original or copy of the watermarked video. The method comprises converting a video frame from RGB color space to YUV color space. Divide a chrominance component into plurality of blocks. Select plurality of blocks based on size of watermark. Associate a pixel in the watermark with selected plurality of blocks. Embed the watermark corresponding to selected plurality of blocks wherein embedding comprises replacing a first pixel value of the block with maximum value of first column of the block if binary value of the corresponding watermark pixel is one or else replace with minimum value. Combine Y component and chrominance components resulting processed YUV video frame and convert it to RGB video frame. Extract the watermark substantially in a reverse process.
摘要翻译：本发明涉及一种计算机实现的方法，系统和计算机可读介质，用于将水印嵌入到视频中并从水印视频的原始或副本中提取水印。该方法包括将视频帧从RGB色彩空间转换为YUV色彩空间。将色度分量划分成多个块。根据水印大小选择多个块。将水印中的像素与所选择的多个块相关联。嵌入与所选择的多个块相对应的水印，其中嵌入包括如果对应的水印像素的二进制值为1或者用最小值替换，则替换该块的第一列的最大值的第一像素值。组合Y分量和色度分量，生成经处理的YUV视频帧，并将其转换为RGB视频帧。基本上以相反的过程提取水印。

5. 发明申请

US20130185780A1 COMPUTER IMPLEMENTED METHOD AND SYSTEM FOR GENERATING A ONE TIME PASSWORD 审中-公开
标题翻译：计算机实现方法和系统，用于生成一次性密码
公开(公告)号：US20130185780A1
公开(公告)日：2013-07-18
申请号：US13531683
申请日：2012-06-25
申请人： Vijayaraghavan Varadharajan , Sivakumar Kuppusamy , Kanika Pasricha , Rajarathnam Nallusamy
发明人： Vijayaraghavan Varadharajan , Sivakumar Kuppusamy , Kanika Pasricha , Rajarathnam Nallusamy
IPC分类号： G06F21/00
CPC分类号： H04L9/0863 , G06F21/335 , H04L9/0869 , H04L9/3228 , H04L63/0838
摘要： This technology provides methods, non-transitory computer readable medium and apparatuses that generate a OneTime Password (OTP) such that no hardware token is used. The technology uses some functions and parameters generated and transmitted to the client machine, by the server. The server generates a token for each session, cyclic groups G1 and G2 of elements and sends this to client machine. The client generates a first OTP using a predefined function on the token and the hash value of user password, such that retrieving the hash value of the password from the first OTP is a discrete log problem. A second OTP is generated using a bilinear mapping on the first OTP, and an element of G1, such that generating first OTP from second OTP is a bilinear inverse problem.
摘要翻译：该技术提供了生成不使用硬件令牌的OneTime密码（OTP）的方法，非暂时性计算机可读介质和装置。该技术使用生成的一些功能和参数，并由服务器传输到客户端机器。服务器为每个会话生成令牌，循环组G1和G2元素，并将其发送到客户机。客户端使用令牌上的预定义函数和用户密码的哈希值生成第一个OTP，从而从第一个OTP检索密码的哈希值是离散的日志问题。使用第一OTP上的双线性映射和G1的元素生成第二OTP，使得从第二OTP生成第一OTP是双线性逆问题。

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