公开(公告)号：US5586186A

公开(公告)日：1996-12-17

申请号：US275500

申请日：1994-07-15

申请人： Gideon A. Yuval ,  Michael Ernst

发明人： Gideon A. Yuval ,  Michael Ernst

IPC分类号： G06F1/00 ,  G06F21/00 ,  H04L9/30

CPC分类号： G06F21/10 ,  H04L9/302 ,  G06F2211/007 ,  G06F2221/2107 ,  H04L2209/08 ,  H04L2209/34 ,  H04L2209/56

摘要： A system for controlling unauthorized access to information distributed to users and, more particularly, for controlling unauthorized access to software distributed to users is provided. One method utilizing the system of the present invention enables the software to be encrypted using a single encryption key and to be decrypted using a multiplicity of "decryption" keys, each of which is unique to a particular user. The "decryption" keys are the products of numeric representations of identifying information relating to users and unique user keys generated using the numeric representations and a "true" decryption key. Since each user receives a unique user key and both the numeric representation and the user key are generated using the identifying information, if the user reveals the numeric representation and the user key (or the product of the numeric representation and the user key), the numeric representation and the user key can be traced to the user who revealed them. Another method utilizing the system of the present invention introduces randomness or pseudo-randomness into the decryption scheme to provide an additional level of security to the scheme.

摘要翻译： 提供了一种用于控制未经授权地访问分发给用户的信息的系统，更具体地，用于控制未经授权的访问分发给用户的软件。 利用本发明的系统的一种方法使得能够使用单个加密密钥对软件进行加密，并且使用多个“特定用户”唯一的“解密”密钥进行解密。 “解密”密钥是与用户相关的识别信息和使用数字表示生成的唯一用户密钥和“真实”解密密钥的数字表示的产物。 由于每个用户接收到唯一的用户密钥，并且使用识别信息生成数字表示和用户密钥，所以如果用户显示数字表示和用户密钥（或数字表示和用户密钥的乘积），则 数字表示和用户密钥可以追溯到显示他们的用户。 利用本发明的系统的另一种方法将随机性或伪随机性引入到解密方案中，以为该方案提供额外的安全级别。

公开(公告)号：US07792121B2

公开(公告)日：2010-09-07

申请号：US10336240

申请日：2003-01-03

申请人： R. Donald Thompson, III ,  Davide Massarenti ,  Cosmin A. Corbea ,  Gerald F. Cermak ,  Gideon A. Yuval

发明人： R. Donald Thompson, III ,  Davide Massarenti ,  Cosmin A. Corbea ,  Gerald F. Cermak ,  Gideon A. Yuval

IPC分类号： H04L12/56

CPC分类号： H04H60/06 ,  H04H60/14 ,  H04L12/1881 ,  H04L51/00 ,  H04L51/04 ,  H04L63/0428 ,  H04L63/123 ,  H04W72/005 ,  H04W72/1289

摘要： Serialized data from broadcast services is provided to a broadcast server for transmitting to one or more client devices. The serialized data may correspond to shared data, private data, or control data. Data is scheduled for transmission based on weighted priorities including quality of service metrics. The transmission frame is arranged according to a frame protocol that includes provisions for a table of contents indexing system for the shared data. Packets of shared data are formatted based on criteria that is known by the particular broadcast service and corresponding application that is resident on the client device. The client device receives the table of contents at the transport layer, and notifies applications of data that will be available in the next frame. Applications submit prioritized requests to the transport layer, requesting data in the next frame. Data is retrieved by the transport layer, and deserialized by handlers for each application.

摘要翻译： 来自广播服务的序列化数据被提供给广播服务器以发送到一个或多个客户端设备。 序列化数据可对应于共享数据，专用数据或控制数据。 基于加权优先级计划数据传输，包括服务质量度量。 传输帧根据包括用于共享数据的目录索引系统的规定的帧协议进行布置。 基于由特定广播服务所知的标准和驻留在客户端设备上的对应应用程序来格式化共享数据包。 客户端设备在传输层接收目录，并通知应用程序在下一帧中可用的数据。 应用程序将优先级请求提交给传输层，在下一帧中请求数据。 数据由传输层检索，并由处理程序对每个应用进行反序列化。

公开(公告)号：US07405736B2

公开(公告)日：2008-07-29

申请号：US11093324

申请日：2005-03-29

申请人： Nicholas P. Wilt ,  Gideon A. Yuval ,  Michael D. Stokes

发明人： Nicholas P. Wilt ,  Gideon A. Yuval ,  Michael D. Stokes

IPC分类号： G09G5/02

CPC分类号： H04N1/6016

摘要： An imaging or other sensory reproduction system efficiently converts image or other sensory data between a perceptual color space (e.g., the sRGB color space) and a physical color space (unity gamma) or other perceptual/physical sensory models that are related by an expression involving a computationally expensive exponential function. The imaging system calculates exponential functions that can be composed from computationally inexpensive operations, such as square root, square, reciprocal, as well as multiplications and/or additions and subtractions. These computationally less expensive functions are then combined, such as in a weighted and/or offset mean, summation or difference to approximate the computationally expensive exponential function. The imaging system evaluates the expression using the approximation to efficiently yield the converted image data. The efficient conversion between perceptual and physical color spaces allows operations, such as blending and anti-aliasing, to be performed in the physical color space before display of a perceptual color space image.

公开(公告)号：US07330864B2

公开(公告)日：2008-02-12

申请号：US09797937

申请日：2001-03-01

申请人： Gideon A. Yuval ,  Nicholas P. Wilt ,  James F. Blinn ,  Michael D. Stokes

发明人： Gideon A. Yuval ,  Nicholas P. Wilt ,  James F. Blinn ,  Michael D. Stokes

IPC分类号： G06F7/00 ,  G06F7/38

CPC分类号： H03M7/24 ,  G06F7/483 ,  G06F9/30025

摘要： A method for providing a 16-bit floating point data representation where the 16-bit floating point data representation may be operated upon by a microprocessors native floating point instruction set. The method contemplates the use a variety of techniques for converting the 16-bit floating point number into a representative native floating point value. Thereafter, the native microprocessor floating point instruction set may perform operations upon the converted data. Upon completion, the native floating point data representation may be converted back into the 16-bit floating point value.

摘要翻译： 一种用于提供16位浮点数据表示的方法，其中16位浮点数据表示可以由微处理器本地浮点指令集来操作。 该方法考虑使用各种技术将16位浮点数转换为代表性的本机浮点值。 此后，本地微处理器浮点指令集可以对转换的数据执行操作。 完成后，本地浮​​点数据表示可以转换回16位浮点值。

公开(公告)号：US06954214B2

公开(公告)日：2005-10-11

申请号：US09780325

申请日：2001-02-09

申请人： Nicholas P. Wilt ,  Gideon A. Yuval ,  Michael D. Stokes

发明人： Nicholas P. Wilt ,  Gideon A. Yuval ,  Michael D. Stokes

IPC分类号： H04N1/60 ,  G09G5/02 ,  G09G5/00

CPC分类号： H04N1/6016

摘要： An imaging or other sensory reproduction system efficiently converts image or other sensory data between a perceptual color space (e.g., the sRGB color space) and a physical color space (unity gamma) or other perceptual/physical sensory models that are related by an expression involving a computationally expensive exponential function. The imaging system calculates exponential functions that can be composed from computationally inexpensive operations, such as square root, square, reciprocal, as well as multiplications and/or additions and subtractions. These computationally less expensive functions are then combined, such as in a weighted and/or offset mean, summation or difference to approximate the computationally expensive exponential function. The imaging system evaluates the expression using the approximation to efficiently yield the converted image data. The efficient conversion between perceptual and physical color spaces allows operations, such as blending and anti-aliasing, to be performed in the physical color space before display of a perceptual color space image.

公开(公告)号：US5455600A

公开(公告)日：1995-10-03

申请号：US68925

申请日：1993-05-27

申请人： Steven J. Friedman ,  Karen A. Hargrove ,  Joseph M. Joy ,  Nathan P. Myhrvold ,  Sunita Shrivastava ,  Gideon A. Yuval

发明人： Steven J. Friedman ,  Karen A. Hargrove ,  Joseph M. Joy ,  Nathan P. Myhrvold ,  Sunita Shrivastava ,  Gideon A. Yuval

IPC分类号： G09G3/20 ,  G09G5/02 ,  G09G5/06 ,  H04N1/52 ,  G09G1/28

CPC分类号： G09G5/02 ,  G09G5/06 ,  H04N1/52 ,  G09G3/2051 ,  G09G3/2059

摘要： A high color resolution image is accurately approximated with a low resolution image through a unique combination of ordered dithering and error diffusion. The true color of each pixel is modified with error from previously rendered pixels and then dithered to an intermediate color of 15 bits. The intermediate color is then mapped to the nearest displayable color in a displayable color palette using a precomputed look-up table. Any error between a displayed color of a pixel and its true color is calculated and spread among neighboring pixels not yet rendered.

摘要翻译： 通过有序抖动和误差扩散的独特组合，高分辨率图像通过低分辨率图像精确近似。 每个像素的真实颜色由先前渲染的像素的错误修改，然后抖动到15位的中间色。 然后使用预先计算的查找表将中间颜色映射到可显示调色板中最接近的可显示颜色。 计算像素的显示颜色与其真实颜色之间的任何误差，并且在尚未呈现的相邻像素之间进行分散。

公开(公告)号：US5394518A

公开(公告)日：1995-02-28

申请号：US69173

申请日：1993-05-27

申请人： Steven J. Friedman ,  Gillian Furse ,  Karen A. Hargrove ,  Joseph M. Joy ,  Nathan P. Myhrvold ,  Sunita Shrivastava ,  Gideon A. Yuval

发明人： Steven J. Friedman ,  Gillian Furse ,  Karen A. Hargrove ,  Joseph M. Joy ,  Nathan P. Myhrvold ,  Sunita Shrivastava ,  Gideon A. Yuval

IPC分类号： G06T11/00 ,  G06F15/62

CPC分类号： G06T11/001

摘要： A custom palette comprises colors on a plurality of luminance levels consisting of colors of uniform luminance. The spacing in luminance between levels varies in relation to the luminance, the spacing between levels being closer at low luminance and increasing at greater luminance. The palette preferably includes a gray color from each luminance level, highly saturated colors at the vertices of every alternate level, and a selection of lower saturation colors encircling the gray color on each level. The selection of lower saturation colors preferably includes a higher concentration of flesh and sky colors.

公开(公告)号：US07878398B2

公开(公告)日：2011-02-01

申请号：US12391155

申请日：2009-02-23

申请人： Yuqun Chen ,  Darko Kirovski ,  Yacov Yacobi ,  Gideon A. Yuval

发明人： Yuqun Chen ,  Darko Kirovski ,  Yacov Yacobi ,  Gideon A. Yuval

IPC分类号： G06K7/10

CPC分类号： G09F3/0297 ,  G06K19/08 ,  G06K19/086 ,  G09F3/0292 ,  H04W4/80 ,  H04W12/04 ,  H04W12/06

摘要： Techniques are disclosed to enable utilization of randomly-occurring features of a label (whether embedded or naturally inherent) to provide counterfeit-resistant and/or tamper-resistant labels. More specifically, labels including randomly-occurring features are scanned to determine the labels' features. The information from the scan is utilized to provide identifying indicia which uniquely identifies each label and may be later verified against the label features that are present to determine whether the label is genuine. In a described implementation, the identifying indicia may be cryptographically signed.

摘要翻译： 公开了能够利用标签的随机发生特征（无论是嵌入式还是天然固有的）来提供防伪和/或防篡改标签的技术。 更具体地，扫描包括随机发生的特征的标签以确定标签的特征。 来自扫描的信息用于提供唯一地识别每个标签的识别标记，并且可以随后针对存在的标签特征进行验证，以确定标签是否是真实的。 在所描述的实现中，识别标记可以被加密地签名。

公开(公告)号：US07769165B2

公开(公告)日：2010-08-03

申请号：US11251625

申请日：2005-10-14

申请人： Mariusz H. Jakubowski ,  Ramarathnam Venkatesan ,  Gideon A. Yuval ,  Yacov Yacobi ,  Matthew Cary

发明人： Mariusz H. Jakubowski ,  Ramarathnam Venkatesan ,  Gideon A. Yuval ,  Yacov Yacobi ,  Matthew Cary

IPC分类号： H04K1/00 ,  H04L9/00 ,  H04L9/28

CPC分类号： H04L9/0662 ,  H04L2209/16 ,  H04L2209/24

摘要： A computer-implemented system and method for configuring and operating a white-box cipher is disclosed. In one implementation, the system employs a method for configuring pseudorandom data derived from a key to perform key-scheduling functionality associated with rounds of the cipher. Additionally, the system employs a method for generating white-box executable code, wherein the code hides the pseudorandom data by incorporating it into mathematical operations performed during execution of the rounds. Accordingly, the cipher is suited for white-box applications managing digital rights, such as decoding audio, video and other content.

摘要翻译： 公开了一种用于配置和操作白盒密码的计算机实现的系统和方法。 在一个实现中，系统采用一种用于配置从密钥导出的伪随机数据以执行与密码轮相关联的密钥调度功能的方法。 另外，该系统采用一种产生白盒可执行代码的方法，其中该代码通过将伪随机数据并入到执行循环期间执行的数学运算中来隐藏伪随机数据。 因此，该密码适用于管理数字权利的白盒应用，例如解码音频，视频和其他内容。

公开(公告)号：US07555656B2

公开(公告)日：2009-06-30

申请号：US10985202

申请日：2004-11-10

申请人： John R. Douceur ,  Josh D. Benaloh ,  Gideon A. Yuval ,  Atul Adya

发明人： John R. Douceur ,  Josh D. Benaloh ,  Gideon A. Yuval ,  Atul Adya

IPC分类号： G06F11/30

CPC分类号： H04L63/0428 ,  G06F21/6209 ,  G06F21/6218 ,  G06F2221/2107

摘要： An exclusive encryption system is established using multiple computing devices. The exclusive encryption system allows for the exclusion of certain plaintext (e.g., by one of the computing devices) and ciphertext (e.g., by another of the computing devices) while at the same time maintaining the privacy created by the encryption (e.g., so the other computing device cannot see the plaintext). The exclusive encryption system may be implemented as part of a serverless distributed file system with directory entries (e.g., file names or folder names) being the plaintext, or alternatively as part of other systems.