Authenticatable graphical bar codes
    1.
    发明授权
    Authenticatable graphical bar codes 有权
    可验证的图形条形码

    公开(公告)号:US07107453B2

    公开(公告)日:2006-09-12

    申请号:US09728292

    申请日:2000-12-01

    摘要: Systems and methods for generating and decoding authenticatable graphical bar codes are described. In one aspect, a corroborative signed message is generated from information to be encoded, and a base image is modulated with a graphical encoding of the signed message to produce a marked image. In another aspect, a signed message is extracted from a marked image based upon a comparison of the marked image and a base image. The extracted signed message is decoded to produce a decoded message. Information encoded in the marked image is extracted from the decoded message and authenticated.

    摘要翻译: 描述用于生成和解码可鉴定图形条形码的系统和方法。 在一个方面,从要编码的信息生成确认签名的消息,并且用签名的消息的图形编码调制基本图像以产生标记的图像。 在另一方面,基于标记图像和基本图像的比较,从标记图像中提取签名消息。 提取的签名消息被解码以产生解码的消息。 从解码的消息中提取在标记图像中编码的信息并进行认证。

    Barcode having enhanced visual quality and systems and methods thereof
    3.
    发明授权
    Barcode having enhanced visual quality and systems and methods thereof 有权
    具有增强的视觉质量的条形码及其系统及方法

    公开(公告)号:US07028902B2

    公开(公告)日:2006-04-18

    申请号:US10262882

    申请日:2002-10-03

    IPC分类号: G06K7/10

    摘要: A barcode with enhanced visual quality may be used with an item such as a document. The barcode includes a background field having an embedded graphic. The background caries data related to the item. The embedded graphic may obscure some background data. A bar coding apparatus, system and a corresponding method involve two basic functions: encoding and decoding. The encoding function uses an encoding algorithm to generate the barcode. The graphic is then embedded onto the barcode and the thus-generated enhanced visually significant barcode is placed on the item. Decoding involves machine-reading the barcode using a decoding algorithm. The decoding algorithm can operate with or without an original bit map that was used to generate the graphic. The graphic may be enhanced in a manner that may make at least a portion of the encoded information within the graphic readable by a human.

    摘要翻译: 具有增强的视觉质量的条形码可以与诸如文档的项目一起使用。 条形码包括具有嵌入图形的背景区域。 背景龋与数据有关的数据。 嵌入图形可能会掩盖一些背景数据。 条形码设备,系统和相应的方法涉及两个基本功能:编码和解码。 编码功能使用编码算法来生成条形码。 然后将图形嵌入到条形码上,并将由此产生的增强的视觉上有意义的条形码放置在该物品上。 解码涉及使用解码算法对条形码进行机器读取。 解码算法可以使用或不使用用于生成图形的原始位图进行操作。 图形可以以使得图形中的编码信息的至少一部分可由人类读取的方式来增强。

    Method and apparatus for partial encryption of content
    4.
    发明授权
    Method and apparatus for partial encryption of content 有权
    内容部分加密的方法和装置

    公开(公告)号:US06976166B2

    公开(公告)日:2005-12-13

    申请号:US09776680

    申请日:2001-02-06

    IPC分类号: G06F21/00 H04K1/00 H04L9/00

    摘要: The present invention is directed to methods and apparatus that partially encrypt an information data file. An exemplary method includes dividing the information file into a first file and a second file, wherein the second file includes content from the information file to preclude reconstruction of the information file using only the first file, and encrypting the second file. Additionally, the method provides for transmitting the first file and the encrypted second file from a first device to a second device.

    摘要翻译: 本发明涉及对信息数据文件进行部分加密的方法和装置。 一种示例性方法包括将信息文件划分为第一文件和第二文件,其中第二文件包括来自信息文件的内容,以排除仅使用第一文件重新构建信息文件,并加密第二文件。 此外,该方法提供将第一文件和加密的第二文件从第一设备发送到第二设备。