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公开(公告)号：US08891894B2
公开(公告)日：2014-11-18
申请号：US13250893
申请日：2011-09-30
申请人： Richard E. Crandall , Rudolph van der Merwe , Douglas P. Mitchell , Ian Hendry , Bertrand Serlet
发明人： Richard E. Crandall , Rudolph van der Merwe , Douglas P. Mitchell , Ian Hendry , Bertrand Serlet
IPC分类号： G06K9/36 , H04N7/12 , H04N19/103 , H04N19/137 , H04N19/186 , H04N19/50 , H04N19/593 , H04N19/182 , H04N19/154
CPC分类号： H04N19/182 , H04N19/103 , H04N19/137 , H04N19/154 , H04N19/186 , H04N19/50 , H04N19/593
摘要： Psychovisual image compression techniques are disclosed that compress pixel data by a fixed compression ratio with little or no perceptual loss of detail. In some implementations, a psychovisual compression process is selected among several psychovisual compression processes based on characteristics of the pixel data. Compression is achieved during encoding by discarding psychovisually unnecessary bits from the pixel data. The psychovisual compression processes can be implemented in hardware and operate on scan lines of pixels captured by the image sensor. The psychovisual compression techniques can be used with image compression techniques to compress further the pixel data.
摘要翻译： 公开了心理图像压缩技术，其通过固定的压缩比压缩像素数据，而很少或没有感知到的细节损失。 在一些实现中，基于像素数据的特征，在几个心理视觉压缩过程中选择心理视觉压缩过程。 在编码期间通过从像素数据中舍弃心理上不必要的位来实现压缩。 精神视觉压缩过程可以在硬件中实现，并且对由图像传感器捕获的像素的扫描线进行操作。 心理视觉压缩技术可以与图像压缩技术一起使用以进一步压缩像素数据。
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公开(公告)号：US20130084003A1
公开(公告)日：2013-04-04
申请号：US13250893
申请日：2011-09-30
申请人： Richard E. Crandall , Rudolph van der Merwe , Douglas P. Mitchell , Ian Hendry , Bertrand Serlet
发明人： Richard E. Crandall , Rudolph van der Merwe , Douglas P. Mitchell , Ian Hendry , Bertrand Serlet
IPC分类号： G06K9/36
CPC分类号： H04N19/182 , H04N19/103 , H04N19/137 , H04N19/154 , H04N19/186 , H04N19/50 , H04N19/593
摘要： Psychovisual image compression techniques are disclosed that compress pixel data by a fixed compression ratio with little or no perceptual loss of detail. In some implementations, a psychovisual compression process is selected among several psychovisual compression processes based on characteristics of the pixel data. Compression is achieved during encoding by discarding psychovisually unnecessary bits from the pixel data. The psychovisual compression processes can be implemented in hardware and operate on scan lines of pixels captured by the image sensor. The psychovisual compression techniques can be used with image compression techniques to compress further the pixel data.
摘要翻译： 公开了心理图像压缩技术，其通过固定的压缩比压缩像素数据，而很少或没有感知到的细节损失。 在一些实现中，基于像素数据的特征，在几个心理视觉压缩过程中选择心理视觉压缩过程。 在编码期间通过从像素数据中舍弃心理上不必要的位来实现压缩。 精神视觉压缩过程可以在硬件中实现，并且对由图像传感器捕获的像素的扫描线进行操作。 心理视觉压缩技术可以与图像压缩技术一起使用以进一步压缩像素数据。
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公开(公告)号：US07802099B2
公开(公告)日：2010-09-21
申请号：US11542573
申请日：2006-10-03
IPC分类号： H04L9/32
CPC分类号： H04L9/3263 , H04L63/06 , H04L63/0823
摘要： One embodiment of the present invention provides a system that establishes a secure connection with a peer. During operation, the system obtains an identity for the peer. Next, the system looks up the identity for the peer in a local store, which contains identities for trusted peers. If this lookup fails, the system asks a user if the peer can be trusted. If the user indicates that the peer can be trusted, the system establishes a secure connection with the peer.
摘要翻译： 本发明的一个实施例提供了一种建立与对等体的安全连接的系统。 在运行期间，系统获取对等体的身份。 接下来，系统在本地存储中查找对等体的标识，其中包含可信对等体的标识。 如果此查找失败，则系统向用户询问对等体是否可信任。 如果用户指示对等体可以被信任，则系统与对等体建立安全连接。
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公开(公告)号：US07650507B2
公开(公告)日：2010-01-19
申请号：US12355707
申请日：2009-01-16
IPC分类号： H04L9/32
CPC分类号： H04L9/3271 , H04L9/3073 , H04L9/3247 , H04L2209/80
摘要： A method of generating a digital signature includes generating a first random number from a finite field of numbers, and generating field elements defining a first point on an elliptic curve defined over the finite field of numbers by performing elliptic curve arithmetic on the first random number and an initial public point on the elliptic curve. The method continues by generating a product from a field element, a private key, and a second random number received from a challenger seeking verification of a digital signature, and generating a signature component by summing the product and the first random number. The signature component is reduced using one or more modular reduction operations, using a modulus equal to an order of the elliptic curve, and then the reduced signature component and the field elements are sent to the challenger as a digital signature for verification by the challenger.
摘要翻译： 一种产生数字签名的方法包括：从数字的有限域生成第一随机数，并通过在第一随机数上执行椭圆曲线运算，生成限定数字有限域上定义的椭圆曲线上的第一点的场元素，以及 椭圆曲线上的初始公共点。 该方法通过从寻求数字签名验证的挑战者接收的字段元素，私钥和第二随机数生成产品，以及通过对乘积和第一随机数求和来生成签名组件。 使用一个或多个模块化缩减操作，使用等于椭圆曲线的顺序的模量来减少签名组件，然后将缩减的签名组件和场元素作为数字签名发送给挑战者，以供挑战者验证。
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公开(公告)号：US07607019B2
公开(公告)日：2009-10-20
申请号：US11051441
申请日：2005-02-03
IPC分类号： H04L9/32
CPC分类号： H04L9/3271 , H04L9/3073 , H04L9/3247 , H04L2209/80
摘要： A method of generating a digital signature includes generating a first random number from a finite field of numbers, and generating field elements defining a first point on an elliptic curve defined over the finite field of numbers by performing elliptic curve arithmetic on the first random number and an initial public point on the elliptic curve. The method continues by generating a product from a field element, a private key, and a second random number received from a challenger seeking verification of a digital signature, and generating a signature component by summing the product and the first random number. The signature component is reduced using one or more modular reduction operations, using a modulus equal to an order of the elliptic curve, and then the reduced signature component and the field elements are sent to the challenger as a digital signature for verification by the challenger.
摘要翻译： 一种产生数字签名的方法包括：从数字的有限域生成第一随机数，并通过在第一随机数上执行椭圆曲线运算，生成限定数字有限域上定义的椭圆曲线上的第一点的场元素，以及 椭圆曲线上的初始公共点。 该方法通过从寻求数字签名验证的挑战者接收的字段元素，私钥和第二随机数生成产品，以及通过对乘积和第一随机数求和来生成签名组件。 使用一个或多个模块化缩减操作，使用等于椭圆曲线的顺序的模量来减少签名组件，然后将缩减的签名组件和场元素作为数字签名发送给挑战者，以供挑战者验证。
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公开(公告)号：US07587047B2
公开(公告)日：2009-09-08
申请号：US11159657
申请日：2005-06-22
IPC分类号： H04L9/00
CPC分类号： H04L9/001 , H04L9/0662 , H04L9/3066 , H04L9/3252 , H04L2209/12
摘要： A chaos generator for accumulating stream entropy is disclosed. The chaos generator includes a random source coupled to an entropy accumulator that is configurable for generating a binary random input sequence. The entropy accumulator is configurable for accumulating entropy of the input sequence and providing a binary random output sequence based on the accumulated entropy. The binary random output sequence is reduced by a modular reduction operation having a modulus that is set equal to a cryptographic prime (e.g., the order of an elliptic curve). The number of iterations performed by the entropy accumulator on the binary random input sequence is selected to provide a binary random output sequence having a desired cryptographic strength. The chaos generator can be part of a signing and verification system that uses fast elliptic encryption for small devices.
摘要翻译： 公开了一种用于积聚流熵的混沌发生器。 混沌发生器包括耦合到熵累加器的随机源，其可配置用于生成二进制随机输入序列。 熵累加器可配置为累积输入序列的熵，并提供基于累积熵的二进制随机输出序列。 二进制随机输出序列通过具有设置为等于密码素数（例如，椭圆曲线的顺序）的模数的模块化缩减操作来减少。 选择由二进制随机输入序列中的熵累积器执行的迭代次数以提供具有期望的密码强度的二进制随机输出序列。 混沌生成器可以是对小型设备使用快速椭圆加密的签名和验证系统的一部分。
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公开(公告)号：US20090138721A1
公开(公告)日：2009-05-28
申请号：US12355707
申请日：2009-01-16
IPC分类号： H04L9/32
CPC分类号： H04L9/3271 , H04L9/3073 , H04L9/3247 , H04L2209/80
摘要： A method of generating a digital signature includes generating a first random number from a finite field of numbers, and generating field elements defining a first point on an elliptic curve defined over the finite field of numbers by performing elliptic curve arithmetic on the first random number and an initial public point on the elliptic curve. The method continues by generating a product from a field element, a private key, and a second random number received from a challenger seeking verification of a digital signature, and generating a signature component by summing the product and the first random number. The signature component is reduced using one or more modular reduction operations, using a modulus equal to an order of the elliptic curve, and then the reduced signature component and the field elements are sent to the challenger as a digital signature for verification by the challenger.
摘要翻译： 一种产生数字签名的方法包括：从数字的有限域生成第一随机数，并通过在第一随机数上执行椭圆曲线运算，生成限定数字有限域上定义的椭圆曲线上的第一点的场元素，以及 椭圆曲线上的初始公共点。 该方法通过从寻求数字签名验证的挑战者接收的字段元素，私钥和第二随机数生成产品，以及通过对乘积和第一随机数求和来生成签名组件。 使用一个或多个模块化缩减操作，使用等于椭圆曲线的顺序的模量来减少签名组件，然后将缩减的签名组件和场元素作为数字签名发送给挑战者，以供挑战者验证。
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