专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20060008086A1 Image encryption method and visual decryption device 审中-公开
标题翻译：图像加密方法和视觉解密装置
公开(公告)号：US20060008086A1
公开(公告)日：2006-01-12
申请号：US10526870
申请日：2003-08-27
申请人： Thomas Andreas Kevenaar , Mark Johnson , Geert Schrijen , Pim Tuyls
发明人： Thomas Andreas Kevenaar , Mark Johnson , Geert Schrijen , Pim Tuyls
IPC分类号： H04L9/00
CPC分类号： G09C5/00
摘要： A method of encoding a graphical message (220, 221) based on a key sequence as an encoded sequence of information units. For each pixel of the message, said pixel having a normalized intensity I, a total rotation α which results in a liquid crystal display in a pixel with substantially the intensity I is determined. The key sequence contains arbitrary rotations. The difference between the total rotation a and a corresponding rotation in the key sequence is output as an element of the encoded sequence. A device (201) presents pixels with rotations indicated by the encoded sequence on a first display (701) and pixels with rotations indicated by the key sequence on a second display (211). Superimposing the two displays reveals the graphical message. The method can be repeated for red, green and blue intensities of color pixels, allowing colored graphical messages to be encoded and reconstructed.
摘要翻译：一种基于密钥序列将图形消息（220,221）编码为信息单元的编码序列的方法。对于消息的每个像素，所述像素具有标准化强度I，确定导致基本上强度I的像素中的液晶显示的总旋转α。关键序列包含任意旋转。作为编码序列的元素，输出关键序列中的总旋转a与相应的旋转之间的差。设备（201）在第一显示器（701）上呈现由编码序列指示的旋转的像素，并且在第二显示器（211）上呈现由键序列指示的旋转的像素。叠加两个显示屏显示图形信息。该方法可重复红色，绿色和蓝色强度的彩色像素，允许彩色图形消息进行编码和重构。

2. 发明申请

US20050180569A1 Tamper-resistant visual encryption method and device 审中-公开
标题翻译：防篡改视觉加密方法和设备
公开(公告)号：US20050180569A1
公开(公告)日：2005-08-18
申请号：US10514613
申请日：2003-05-20
申请人： Thomas Andreas Kevenaar , Geert Schrijen , Pim Tuyls
发明人： Thomas Andreas Kevenaar , Geert Schrijen , Pim Tuyls
IPC分类号： G06T1/00 , G09C5/00 , H04N1/387 , H04N7/167
CPC分类号： G06T1/005 , G06T2201/0051
摘要： A method of visually encrypting a graphical message (100), in which a first share (110) is produced based on the graphic message (100) and a key sequence, the method comprising inserting a filler in a monochromatic area of the graphical message (100) before producing the first share (110). The filler may represent a regularly spaced grid, a pseudo-random pattern, a predetermined graphical image or, in case of a color message, a colorful background. Also a device (500) and a computer program product arranged for carrying out the method.
摘要翻译：一种视觉加密图形消息（100）的方法，其中基于图形消息（100）产生第一共享（110）和密钥序列，所述方法包括在图形消息的单色区域中插入填充（ 100）在生产第一股之前（110）。填充物可以表示规则间隔开的网格，伪随机图案，预定图形图像，或者在颜色消息的情况下可以表示彩色背景。还有一种用于执行该方法的设备（500）和计算机程序产品。

3. 发明申请

US20060179407A1 Trusted display device for visual cryptography 审中-公开
标题翻译：用于视觉加密的可信显示设备
公开(公告)号：US20060179407A1
公开(公告)日：2006-08-10
申请号：US10549369
申请日：2004-03-15
申请人： Pim Tuyls , Mark Johnson , Thomas Kevenaar , Geert Schrijen
发明人： Pim Tuyls , Mark Johnson , Thomas Kevenaar , Geert Schrijen
IPC分类号： G06F3/00
CPC分类号： G09C5/00 , G09G2300/023
摘要： A trusted display device (1) for, upon being superimposed on an untrusted display (2), reconstructing a graphical message, said device comprising a display screen (1a) having a plurality of independently addressable pixels. A plurality of sensors (1c) are associated with at least a subset of the pixels of said display screen (1a) and arranged such that they, when the displays (1, 2) are superimposed, are able to detect optically encoded information presented by an underlying pixel of the untrusted display (2) and adapt the activation of its pixels based on said information sensed.
摘要翻译：一种信任的显示设备（1），用于在叠加在不可信的显示器（2）上时，重建图形消息，所述设备包括具有多个可独立寻址的像素的显示屏幕（1a）。多个传感器（1c）与所述显示屏（1a）的像素的至少一个子集相关联并且被布置成使得它们在显示器（1,2）叠加时能够检测光学编码信息由不可信显示器（2）的底层像素呈现，并且基于所感测的信息调整其像素的激活。

4. 发明申请

US20070058835A1 Screen image authentication 审中-公开
标题翻译：屏幕图像认证
公开(公告)号：US20070058835A1
公开(公告)日：2007-03-15
申请号：US10576313
申请日：2004-10-14
申请人： Geert Schrijen , Mark Johnson , Pim Tuyls
发明人： Geert Schrijen , Mark Johnson , Pim Tuyls
IPC分类号： G06K9/00
CPC分类号： H04N1/32101 , H04N2201/0418
摘要： A method of verifying the authenticity of an image (1) rendered on a display screen (10) involves using a graphical representation of an authentication code (2) associated with the image. The graphical representation of the authentication code is also rendered on the display screen, while optional guide marks (3) may also be displayed. Both the image (1) and the associated authentication code (2) are read using a scanner (20), preferably a handheld linear scanner. The scanner calculates an authentication code based upon the image and compares the calculated authentication code with the authentication code read from the display.
摘要翻译：验证在显示屏幕（10）上呈现的图像（1）的真实性的方法涉及使用与图像相关联的认证码（2）的图形表示。验证代码的图形表示也显示在显示屏上，而可选择的引导标记（3）也可以显示。使用扫描器（20），优选地是手持式线性扫描器来读取图像（1）和相关联的认证码（2）。扫描仪基于图像计算认证码，并将计算的认证码与从显示器读取的认证码进行比较。

5. 发明申请

US20050117748A1 Secure visual message communication method and device 审中-公开
标题翻译：安全的视讯消息通信方式和设备
公开(公告)号：US20050117748A1
公开(公告)日：2005-06-02
申请号：US10503684
申请日：2003-01-27
申请人： Geert Schrijen , Pim Tuyls , Thomas Kevenaar , Mark Johnson
发明人： Geert Schrijen , Pim Tuyls , Thomas Kevenaar , Mark Johnson
IPC分类号： G02F1/13 , G02F1/133 , G02F1/1333 , G02F1/1335 , G06F21/83 , G06F21/84 , G09G3/20 , G09G3/36 , H04K1/00 , H04N7/167
CPC分类号： G09C5/00 , G06F21/83 , G06F21/84
摘要： A method of and a device (501) for reconstructing a graphical message (520) using visual cryptography. Cells (303, 304) in a first liquid crystal display (701) are activated if a bit in a message sequence represents ‘1’, and not activated if said bit represents ‘0’. Cells (303, 304) in a second liquid crystal display (511) are activated if a bit in a key sequence represents ‘0’, and not activated if said bit represents ‘1’. The first and second displays (701, 511) are then superimposed so as to visually reconstruct the graphical message (520). Preferably a portion of a polarization filter (305) in an area of the first liquid crystal display (701), and a corresponding portion of a polarization filter (302) in an area of the second liquid crystal display (511) have been omitted to allow superimposition of the first and second liquid crystal displays (701, 511) at said areas.
摘要翻译：一种用于使用可视密码学重建图形消息（520）的方法和装置（501）。如果消息序列中的位表示“1”，则第一液晶显示器（701）中的单元（303,304）被激活，并且如果所述位表示“0”，则不激活。如果键序列中的位表示“0”，则第二液晶显示器（511）中的单元（303,304）被激活，如果所述位表示“1”，则不激活。然后叠加第一和第二显示器（701,511），以便可视地重建图形消息（520）。优选地，省略了在第一液晶显示器（701）的区域中的偏振滤光器（305）的一部分和第二液晶显示器（511）的区域中的偏振滤光器（302）的对应部分，允许第一和第二液晶显示器（701,511）在所述区域处叠加。

6. 发明申请

US20060177060A1 Image alignment 审中-公开
标题翻译：图像对齐
公开(公告)号：US20060177060A1
公开(公告)日：2006-08-10
申请号：US10565666
申请日：2004-07-12
申请人： Mark Johnson , Pim Tuyls , Thomas Kevenaar , Geert Schrijen
发明人： Mark Johnson , Pim Tuyls , Thomas Kevenaar , Geert Schrijen
IPC分类号： H04K1/00
CPC分类号： G09C5/00 , H04N1/3876 , H04N1/44 , H04N1/448 , H04N1/4493
摘要： An image decryption device (1) comprises a screen (10) on which a decrypted image may be visible. The decrypted image may the combination of two partial images, an encrypted image (A) displayed by a display device (2) and a key image or decrypting image (B) superimposed on the encrypted image by the decryption device. To properly align the encrypted image (A) and the key image (B), the decryption device is provided with sensors (11) capable of sensing the position of the decryption device relative to the display device. Corresponding alignment images (22) may be arranged around the screen (20 of the display device, or may be part of the encrypted image. Manual or automatic alignment may be provided.
摘要翻译：图像解密装置（1）包括其上可以看到解密的图像的屏幕（10）。解密图像可以由解密装置组合两个部分图像，由显示装置（2）显示的加密图像（A）和叠加在加密图像上的密钥图像或解密图像（B）。为了正确对准加密图像（A）和密钥图像（B），解密装置设置有能够感测解密装置相对于显示装置的位置的传感器（11）。相应的对准图像（22）可以布置在屏幕周围（20），或者可以是加密图像的一部分。可以提供手动或自动对准。

7. 发明申请

US20060098841A1 Method and system for enabling remote message composition 审中-公开
标题翻译：启用远程消息组合的方法和系统
公开(公告)号：US20060098841A1
公开(公告)日：2006-05-11
申请号：US10548251
申请日：2004-03-01
申请人： Pim Tuyls , Thomas Kevenaar , Geert Schrijen
发明人： Pim Tuyls , Thomas Kevenaar , Geert Schrijen
IPC分类号： G06K9/00
CPC分类号： G09C1/02 , G06F21/36 , G06F2221/2107 , G09C5/00 , H04L9/3226
摘要： A method of and server (100) for enabling composition of a message at a remote terminal (101). The method comprises generating an image comprising a plurality of symbols representing input means, the symbols having an associated particular visual characteristic which is mutually different for at least two of the symbols, transmitting the image for display on the remote terminal (101), receiving a sequence of coordinates from the remote terminal (101), reconstructing the message as a sequence of input means represented by the symbols comprised in the image at the received coordinates, constructing an authentication code as a sequence of visual characteristics associated with the symbols comprised in the image at the received coordinates, and accepting the message as authentic if the authentication code matches a predetermined sequence of visual characteristics.
摘要翻译：一种用于启用在远程终端（101）处的消息组合的方法和服务器（100）。该方法包括生成包括表示输入装置的多个符号的图像，所述符号具有相关联的特定视觉特征，对于至少两个符号相互不同，发送用于在远程终端（101）上显示的图像，接收将来自远程终端（101）的坐标序列重建为由接收到的坐标处的图像中包含的符号表示的输入装置的序列，构建认证码作为与包含在所述图像中的符号相关联的视觉特征序列图像，并且如果认证码与预定的视觉特征序列匹配，则将该消息接受为真实的。

8. 发明申请

US20070118482A1 Security display 审中-公开
标题翻译：安全显示
公开(公告)号：US20070118482A1
公开(公告)日：2007-05-24
申请号：US10596459
申请日：2004-12-13
申请人： Pim Tuyls , Adrianus Sempel , Geert Schrijen , Pieter Snijder
发明人： Pim Tuyls , Adrianus Sempel , Geert Schrijen , Pieter Snijder
IPC分类号： G06Q99/00
CPC分类号： G06F21/84
摘要： A device (1) for decrypting encrypted images comprises an array of sensor elements (11) for sensing a first image, for example an encrypted image, and an array of display elements (12) for displaying a second image, for example a decrypted image. At least some display elements comprise integrated sensor elements, thus reducing the number of parts of the device. The integrated display/sensor elements (13) may be constituted by polymeric LED elements. The sensor function of the integrated elements may also be used for positioning the device relative to a terminal, and/or for checking a biometric feature of the user.
摘要翻译：用于解密加密图像的设备（1）包括用于感测第一图像（例如加密图像）的传感器元件阵列（11）和用于显示第二图像的显示元件阵列（12），例如解密图像。至少一些显示元件包括集成传感器元件，从而减少了设备的部件数量。集成显示/传感器元件（13）可以由聚合物LED元件构成。集成元件的传感器功能也可用于相对于终端定位设备，和/或用于检查用户的生物测定特征。

9. 发明申请

US20050265550A1 Polynomial-based multi-user key generation and authentication method and system 审中-公开
标题翻译：基于多项式的多用户密钥生成和认证方法及系统
公开(公告)号：US20050265550A1
公开(公告)日：2005-12-01
申请号：US10507190
申请日：2003-02-14
申请人： Pim Tuyls , Thomas Kevenaar , Geert Schrijen , Marten Van Dijk
发明人： Pim Tuyls , Thomas Kevenaar , Geert Schrijen , Marten Van Dijk
IPC分类号： H04L9/08 , H04L9/32 , H04L12/28 , H04L9/00
CPC分类号： H04L9/3273 , H04L9/085 , H04L9/321 , H04L9/3218 , H04L12/2805 , H04L2209/603
摘要： A method of generating a common secret between a first party and a second party, preferably devices (101-105) in a home network (100) that operate in accordance with a Digital Rights Management (DRM) framework. The devices calculate the common secret by evaluating the product of two polynomials P(x, y) and Q(x, z) using parameters previously distributed by a Trusted Third Party (TTP) and parameters obtained from the other party. Preferably the parties subsequently verify that the other party has generated the same secret using a zero-knowledge protocol or a commitment-based protocol. The method is particularly suitable for very low power devices such as Chip-In-Disc type devices.
摘要翻译：优选地，在第一方和第二方之间生成公共秘密的方法，优选地根据数字版权管理（DRM）框架操作的归属网络（100）中的设备（101-105）。这些设备通过使用先前由可信第三方（TTP）分发的参数和从对方获得的参数来评估两个多项式P（x，y）和Q（x，z）的乘积来计算公共秘密。优选地，各方随后使用零知识协议或基于承诺的协议来验证对方已经生成了相同的秘密。该方法特别适用于非常低功率的器件，例如片内盘式器件。

10. 发明申请

US20060115082A1 Authentication system with visual encryption using polarisation of light 审中-公开
标题翻译：使用光的偏振的视觉加密的认证系统
公开(公告)号：US20060115082A1
公开(公告)日：2006-06-01
申请号：US10538335
申请日：2003-11-17
申请人： Thomas Kevenaar , Pim Tuyls , Geert Schrijen
发明人： Thomas Kevenaar , Pim Tuyls , Geert Schrijen
IPC分类号： H04N7/167
CPC分类号： B42D25/29 , B42D25/333 , B42D2035/34 , G07D7/0047 , G07D7/0053 , G07D7/121 , G07D7/2033 , G09C5/00
摘要： An authentication system 600 includes optical authentication devices 620, 630, 640. Each optical authentication device includes an optical layer 622, 632, 642. The optical layer includes a representation of a first image visually encrypted under control of an encryption key. The encrypted first image uniquely identifies the respective authentication device. An inspection device 610 decrypts the optical layer of the optical authentication device under control of the encryption key and visualizes the first image to enable verification of the unique identification of the authentication device.
摘要翻译：认证系统600包括光学认证设备620,630,640。每个光学认证设备包括光学层622,632,642。光学层包括在加密密钥的控制下视觉加密的第一图像的表示。加密的第一图像唯一地标识相应的认证设备。检查装置610在加密密钥的控制下对光学认证装置的光学层进行解密，并且可视化第一图像，以便验证认证装置的唯一标识。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式