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    Methods and systems for cryptographic access control of video
    2.
    发明授权
    Methods and systems for cryptographic access control of video 有权
    视频加密访问控制的方法和系统

    公开(公告)号：US09094733B2

    公开(公告)日：2015-07-28

    申请号：US13977529

    申请日：2012-03-31

    申请人： Karanvir S. Grewal ,  David Durham ,  Xiaozhu Kang ,  Men Long ,  Prashant Dewan

    发明人： Karanvir S. Grewal ,  David Durham ,  Xiaozhu Kang ,  Men Long ,  Prashant Dewan

    IPC分类号： G06F21/62 ,  H04N21/647 ,  H04N21/266 ,  H04N21/4405 ,  H04N21/4627 ,  H04N21/8355 ,  H04L9/18

    CPC分类号： H04N21/64715 ,  H04N21/23476 ,  H04N21/2541 ,  H04N21/266 ,  H04N21/4405 ,  H04N21/4627 ,  H04N21/8355

    摘要： Cryptographic access control of multimedia video is presented. A method includes generating as metadata an access control policy (ACP) associated with video, the ACP including authorization rules and cryptographic information associated with an encryption policy; encrypting the video according to the encryption policy; and encoding the encrypted video with the authorization rules and the cryptographic information, which may be used to decrypt and render the encoded video. As an example, an authorized receiver device having credentials and/or capabilities matched to the authorization rules may extract the ACP information from the encrypted video and use it to decrypt and properly render the video. The method may further include visually encoding the encrypted video with at least portions of the authorization rules and the cryptographic information, such that the visually encoded video is renderable as the video by an authorized device, but is renderable as visually unintelligible video by an unauthorized device.

    摘要翻译： 介绍了多媒体视频的密码访问控制。 一种方法包括：生成与视频相关联的访问控制策略（ACP）作为元数据，所述ACP包括与加密策略相关联的授权规则和加密信息; 根据加密策略加密视频; 并使用可用于解密和呈现编码视频的授权规则和密码信息对加密的视频进行编码。 作为示例，具有与授权规则匹配的凭证和/或能力的授权接收机设备可以从加密的视频中提取ACP信息，并使用它来解密并适当地呈现视频。 该方法还可以包括使用授权规则和密码信息的至少一部分来视觉地编码加密的视频，使得视觉编码的视频可以由授权设备呈现为视频，但是可被未经授权的设备呈现为视觉上难以理解的视频 。

    PRESERVING IMAGE PRIVACY WHEN MANIPULATED BY CLOUD SERVICES
    3.
    发明申请
    PRESERVING IMAGE PRIVACY WHEN MANIPULATED BY CLOUD SERVICES 有权
    当由云服务处理时保留图像隐私

    公开(公告)号：US20130279690A1

    公开(公告)日：2013-10-24

    申请号：US13976298

    申请日：2011-12-15

    申请人： David M. Durham ,  Men Long ,  Karanvir S. Grewal ,  Prashant Dewan ,  Xiaozhu Kang

    发明人： David M. Durham ,  Men Long ,  Karanvir S. Grewal ,  Prashant Dewan ,  Xiaozhu Kang

    IPC分类号： H04L9/28

    CPC分类号： H04L9/28 ,  G06F21/6263 ,  G06F2221/2107 ,  H04L9/065 ,  H04L63/0428 ,  H04N1/4486 ,  H04N21/2743 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/4788 ,  H04N21/8153

    摘要： An apparatus and method for preserving image privacy when manipulated by cloud services includes middleware for receiving an original image, splitting the original image into two sub-images, where the RGB pixel values of the sub-images have a bit value that is less than RGB pixel values of the original image. The sub-images are encrypted by adding a keystream to the RGB pixel values of the sub-images. The sub-image data is transmitted to a cloud service such as a social network or photo-sharing site, which manipulate the images by resizing, cropping, filtering, or the like. The sub-image data is received by the middleware and is successfully decrypted irrespective of the manipulations performed by the cloud services. In an alternative embodiment, the blocks of the original image are permutated when encrypted, and then reverse-permutated when decrypted.

    摘要翻译： 一种用于在由云服务操作时保护图像隐私的装置和方法包括用于接收原始图像的中间件，将原始图像分割成两个子图像，其中子图像的RGB像素值具有小于RGB的比特值 原始图像的像素值。 通过向子图像的RGB像素值添加密钥流来加密子图像。 子图像数据被发送到诸如社交网络或照片共享站点的云服务，其通过调整大小，裁剪，过滤等来操纵图像。 子图像数据由中间件接收，并且被成功解密，而与云服务执行的操作无关。 在替代实施例中，原始图像的块在加密时被置换，然后在被解密时反向排列。

    MEDIA ENCRYPTION BASED ON BIOMETRIC DATA
    5.
    发明申请
    MEDIA ENCRYPTION BASED ON BIOMETRIC DATA 审中-公开
    基于生物量数据的媒体加密

    公开(公告)号：US20140032924A1

    公开(公告)日：2014-01-30

    申请号：US13562046

    申请日：2012-07-30

    申请人： David M. Durham ,  Xiaozhu Kang ,  Prashant Dewan ,  Men Long ,  Karanvir S. Grewal

    发明人： David M. Durham ,  Xiaozhu Kang ,  Prashant Dewan ,  Men Long ,  Karanvir S. Grewal

    IPC分类号： G06F21/00

    CPC分类号： G06F21/10 ,  G06F21/32 ,  H04L9/0866 ,  H04L63/045 ,  H04L63/0861

    摘要： Embodiments of techniques and systems for biometric-data-based media encryption are described. In embodiments, an encryption key may be created for a recipient user based at least in part on biometric data of the recipient user. This encryption key may be maintained on a key maintenance component and used by a sharing user to encrypt a media file for access by the recipient user. One or more access policies associated with recipient user may be encrypted in the encrypted media file as well. In embodiments, the media file may be encrypted for use by multiple recipient users. When a recipient user desires to access the encrypted media file, a decryption key may be generated in real time based on contemporaneously captured biometric data and used to provide access to the encrypted media file. Other embodiments may be described and claimed.

    摘要翻译： 描述了用于基于生物特征数据的媒体加密的技术和系统的实施例。 在实施例中，可以至少部分地基于接收者用户的生物特征数据为接收者用户创建加密密钥。 该加密密钥可以维护在密钥维护组件上，并由共享用户使用以加密媒体文件以供接收用户访问。 与接收者用户相关联的一个或多个访问策略也可以在加密的媒体文件中被加密。 在实施例中，媒体文件可以被加密以供多个接收者用户使用。 当收件人用户希望访问加密的媒体文件时，可以基于同时捕获的生物特征数据实时地生成解密密钥，并且用于提供对加密的媒体文件的访问。 可以描述和要求保护其他实施例。

    TURING TEST BASED USER AUTHENTICATION AND USER PRESENCE VERIFICATION SYSTEM, DEVICE, AND METHOD
    6.
    发明申请
    TURING TEST BASED USER AUTHENTICATION AND USER PRESENCE VERIFICATION SYSTEM, DEVICE, AND METHOD 有权
    基于测试的用户认证和用户存在的验证系统，设备和方法

    公开(公告)号：US20140230046A1

    公开(公告)日：2014-08-14

    申请号：US13976918

    申请日：2011-12-27

    申请人： Prashant Dewan ,  David M. Durham ,  Ling Huang ,  Karanvir S. Grewal ,  Xiaozhu Kang

    发明人： Prashant Dewan ,  David M. Durham ,  Ling Huang ,  Karanvir S. Grewal ,  Xiaozhu Kang

    IPC分类号： G06F21/32

    CPC分类号： G06F21/32 ,  G06K9/00288 ,  G06K9/00899

    摘要： A password-less method for authenticating a user includes capturing one or more images of a face of the user and comparing the one or more images with a previously collected face template. Randomly selected colored light and randomized blinking patterns are used to capture the images of the user. Such captured images are compared to previously collected face templates, thereby thwarting spoof attacks. A secret image, known only to the user and the device, is moved from one area of the display to another randomly selected area, using the movements of the user's head or face, thereby providing a Turing based challenge. Protected audio video path (PAVP) enabled devices and components are used to protect the challenge from malware attacks.

    摘要翻译： 用于认证用户的无密码方法包括捕获用户的脸部的一个或多个图像并将一个或多个图像与先前收集的面部模板进行比较。 随机选择的彩色光和随机闪烁图案用于捕获用户的图像。 将这样的拍摄图像与先前收集的面部模板进行比较，从而阻止欺骗攻击。 使用用户和设备已知的秘密图像使用用户头部或脸部的移动从显示器的一个区域移动到另一个随机选择的区域，从而提供基于图灵的挑战。 受保护的音频视频路径（PAVP）启用的设备和组件用于保护挑战免受恶意软件攻击。

    Method and device for securely sharing images across untrusted channels
    7.
    发明授权
    Method and device for securely sharing images across untrusted channels 有权
    用于在不受信任的信道上安全地共享图像的方法和设备

    公开(公告)号：US08751809B2

    公开(公告)日：2014-06-10

    申请号：US13513047

    申请日：2011-09-12

    申请人： Prashant Dewan ,  David M. Durham ,  Xiaozhu Kang ,  Karanvir S. Grewal

    发明人： Prashant Dewan ,  David M. Durham ,  Xiaozhu Kang ,  Karanvir S. Grewal

    IPC分类号： G06F12/14 ,  H04L9/32 ,  G06F11/30

    CPC分类号： H04L9/3231 ,  G06F21/32 ,  G06F21/6209 ,  G06F2221/2109 ,  H04L9/0825 ,  H04L63/045 ,  H04L63/0861

    摘要： A method and device for securely sharing images across untrusted channels includes downloading an encrypted image from a remote server to a computing device. The encrypted image may be encrypted at the time of uploading by another user. The current user of the computing device is authenticated using a facial recognition procedure. If the current user is authenticated and is determined to be authorized to view the decrypted image, the encrypted image is decrypted and displayed to the user. If the user becomes unauthenticated (e.g., the user leaves the computing device or another user replaces the current user), the encrypted image is displayed in place of the decrypted image such that the decrypted image is displayed only for authorized persons physically present at the computing device.

    摘要翻译： 一种用于在不信任信道上安全地共享图像的方法和设备包括将加密图像从远程服务器下载到计算设备。 加密图像可以在其他用户上传时被加密。 使用面部识别程序认证计算设备的当前用户。 如果当前用户被认证并被确定被授权以查看解密的图像，则加密的图像被解密并显示给用户。 如果用户变得未认证（例如，用户离开计算设备或另一用户替换当前用户），则加密图像被代替解密的图像被显示，使得解密的图像仅显示在计算机上物理存在的授权人员 设备。

    Turing test based user authentication and user presence verification system, device, and method
    8.
    发明授权
    Turing test based user authentication and user presence verification system, device, and method 有权
    基于图灵测试的用户认证和用户存在验证系统，设备和方法

    公开(公告)号：US09081947B2

    公开(公告)日：2015-07-14

    申请号：US13976918

    申请日：2011-12-27

    申请人： Prashant Dewan ,  David M. Durham ,  Ling Huang ,  Karanvir S. Grewal ,  Xiaozhu Kang

    发明人： Prashant Dewan ,  David M. Durham ,  Ling Huang ,  Karanvir S. Grewal ,  Xiaozhu Kang

    IPC分类号： G06F21/32 ,  G06K9/78 ,  G06K9/00

    CPC分类号： G06F21/32 ,  G06K9/00288 ,  G06K9/00899

    摘要： A password-less method for authenticating a user includes capturing one or more images of a face of the user and comparing the one or more images with a previously collected face template. Randomly selected colored light and randomized blinking patterns are used to capture the images of the user. Such captured images are compared to previously collected face templates, thereby thwarting spoof attacks. A secret image, known only to the user and the device, is moved from one area of the display to another randomly selected area, using the movements of the user's head or face, thereby providing a Turing based challenge. Protected audio video path (PAVP) enabled devices and components are used to protect the challenge from malware attacks.

    摘要翻译： 用于认证用户的无密码方法包括捕获用户的脸部的一个或多个图像并将一个或多个图像与先前收集的面部模板进行比较。 随机选择的彩色光和随机闪烁图案用于捕获用户的图像。 将这样的拍摄图像与先前收集的面部模板进行比较，从而阻止欺骗攻击。 使用用户和设备已知的秘密图像使用用户头部或脸部的移动从显示器的一个区域移动到另一个随机选择的区域，从而提供基于图灵的挑战。 受保护的音频视频路径（PAVP）启用的设备和组件用于保护挑战免受恶意软件攻击。

    METHOD AND DEVICE FOR SECURELY SHARING IMAGES ACROSS UNTRUSTED CHANNELS
    10.
    发明申请
    METHOD AND DEVICE FOR SECURELY SHARING IMAGES ACROSS UNTRUSTED CHANNELS 有权
    用于非共享通道安全地共享图像的方法和装置

    公开(公告)号：US20130067228A1

    公开(公告)日：2013-03-14

    申请号：US13513047

    申请日：2011-09-12

    申请人： Prashant Dewan ,  David M. Durham ,  Xiaozhu Kang ,  Karanvir S. Grewal

    发明人： Prashant Dewan ,  David M. Durham ,  Xiaozhu Kang ,  Karanvir S. Grewal

    IPC分类号： H04L9/32

    CPC分类号： H04L9/3231 ,  G06F21/32 ,  G06F21/6209 ,  G06F2221/2109 ,  H04L9/0825 ,  H04L63/045 ,  H04L63/0861

    摘要： A method and device for securely sharing images across untrusted channels includes downloading an encrypted image from a remote server to a computing device. The encrypted image may be encrypted at the time of uploading by another user. The current user of the computing device is authenticated using a facial recognition procedure. If the current user is authenticated and is determined to be authorized to view the decrypted image, the encrypted image is decrypted and displayed to the user. If the user becomes unauthenticated (e.g., the user leaves the computing device or another user replaces the current user), the encrypted image is displayed in place of the encrypted image such that the decrypted image is displayed only for authorized persons physically present at the computing device.

    摘要翻译： 一种用于在不信任信道上安全地共享图像的方法和设备包括将加密图像从远程服务器下载到计算设备。 加密图像可以在其他用户上传时被加密。 使用面部识别程序认证计算设备的当前用户。 如果当前用户被认证并被确定被授权以查看解密的图像，则加密的图像被解密并显示给用户。 如果用户变得未认证（例如，用户离开计算设备或另一用户替换当前用户），则加密图像被代替加密图像被显示，使得解密的图像仅对于在计算机中物理存在的授权人员显示 设备。