Techniques for detecting, analyzing, and using visible authentication patterns
    43.
    发明授权
    Techniques for detecting, analyzing, and using visible authentication patterns 有权
    用于检测,分析和使用可见认证模式的技术

    公开(公告)号:US07937588B2

    公开(公告)日:2011-05-03

    申请号:US10585396

    申请日:2005-01-06

    IPC分类号: H04L9/00

    摘要: Improved techniques for making copy detection patterns and using them to detect copying relationships between digital representations. The techniques include techniques for including a message in a copy detection pattern without altering the copy detection patterns entropy and reading the message, techniques for using a copy detection pattern on an analog form to determine whether the analog form is an original analog form without reference to a digital representation of the original of the analog form's copy detection pattern, techniques for increasing the sensitivity of copy detection using copy detection patterns by modifying one of two copy detection patterns that are being compared to take into account alterations resulting from the copying process, techniques for distributing a copy detection pattern across a document, and techniques for using the entropy of a copy detection pattern to locate the copy detection pattern. Also disclosed are applications of copy detection patterns with copying that involves transformations between the digital and analog forms and with digital-to-digital copying.

    摘要翻译: 改进了复制检测模式的技术,并使用它们来检测数字表示之间的复制关系。 这些技术包括用于将消息包括在复制检测模式中而不改变复制检测模式熵并读取消息的技术,在模拟形式上使用复制检测模式的技术来确定模拟形式是否是原始模拟形式而不参考 模拟形式的复制检测模式的原件的数字表示,使用复制检测模式增加复制检测的灵敏度的技术,通过修改正在被比较的两个拷贝检测模式中的一个来考虑由复制过程导致的改变,技术 用于在文档上分发复制检测图案,以及使用复制检测图案的熵来定位复制检测图案的技术。 还公开了具有涉及数字和模拟形式之间的转换以及数字 - 数字复制的复制的拷贝检测模式的应用。

    Visible authentication patterns for printed document
    44.
    发明授权
    Visible authentication patterns for printed document 有权
    打印文件的可见认证模式

    公开(公告)号:US07809152B2

    公开(公告)日:2010-10-05

    申请号:US10514271

    申请日:2003-05-14

    IPC分类号: G06K9/00

    摘要: Techniques for determining authenticity of analog forms such as packaging or documents (117). One of the techniques determines whether the analog form has been made directly from a digital representation (903) or by photocopying or scanning an analog form. The technique makes the determination by comparing (911) an original digital representation of a portion of the analog form with a digital recording (203) of the portion from the analog form and measuring differences in features that are affected by the operations of photocopying or scanning. The original digital representation (105) and the analog form may have a “noisy”, i.e., random or pseudo random pattern. Such noisy patterns may further be used for other authentication purposes, such as determining whether the portion of the analog form that has the noisy pattern has been altered and to carry hidden messages. The noisy pattern may carry a logo or may be part or all of a barcode.

    摘要翻译: 用于确定诸如包装或文件的模拟形式的真实性的技术(117)。 其中一种技术决定了模拟形式是直接从数字表示形式(903)还是通过复印或扫描模拟形式。 该技术通过将模拟形式的一部分的原始数字表示与来自模拟形式的部分的数字记录(203)进行比较(911)来进行确定,并且测量受复印或扫描操作影响的特征的差异 。 原始数字表示(105)和模拟形式可以具有“噪声”,即随机或伪随机模式。 这种噪声模式可以进一步用于其他认证目的,例如确定具有噪声模式的模拟形式的部分是否已被改变并且携带隐藏消息。 嘈杂的图案可能携带标志,或可能是条形码的一部分或全部。

    Method , apparatus and system for channel estimation in two-way relaying networks
    45.
    发明申请
    Method , apparatus and system for channel estimation in two-way relaying networks 失效
    双向中继网络中信道估计的方法,装置和系统

    公开(公告)号:US20090190634A1

    公开(公告)日:2009-07-30

    申请号:US12319583

    申请日:2009-01-09

    IPC分类号: H04L25/20 H04B7/14

    摘要: An apparatus for estimating a wireless radio channel between a first terminal and a relay station, the apparatus including a receiver for receiving a signal including a superposition of previously transmitted first information from the first terminal and second information from a second terminal, the second terminal also communicating with the relay station, a storage for storing the previously transmitted first information, and a channel calculator for calculating the wireless radio channel using the received signal and the stored first information as pilot information for the received signal.

    摘要翻译: 一种用于估计第一终端和中继站之间的无线无线电信道的装置,所述装置包括接收机,用于接收包括来自第一终端的先前发送的第一信息的叠加的信号和来自第二终端的第二信息,第二终端也 与中继站通信,用于存储先前发送的第一信息的存储器,以及用于使用接收信号计算无线电信道的信道计算器和存储的第一信息作为接收信号的导频信息。

    Techniques for reducing the computational cost of embedding information in digital representations
    46.
    发明授权
    Techniques for reducing the computational cost of embedding information in digital representations 有权
    用于降低数字表示中嵌入信息的计算成本的技术

    公开(公告)号:US07555650B1

    公开(公告)日:2009-06-30

    申请号:US10390215

    申请日:2003-03-17

    CPC分类号: H04N21/8358 H04N21/23892

    摘要: The computational cost of embedding information in a digital representation is reduced by making a set of at least two copies of the digital representation and altering subdivisions of the copies so that corresponding subdivisions in the copies are distinguishable from each other. The subdivisions may be arbitrary or may be functional subdivisions of the digital representation. The subdivisions may be distinguishable by features such as watermarks that do not affect the way in which the digital representation is normally used. The marked copy in which the information is embedded is then made by selecting a given subdivision in the marked copy from one of the set of copies. Selection may be done using a selection string that has an element for each subdivision. The value of the element indicates which of the set of digital representations the subdivision corresponding to the element is to be selected from. The result of this procedure is a sequence of distinguishable subdivisions in the marked copy, and the sequence carries the embedded information. Each marked copy may have a unique sequence, in which case the sequence functions as a fingerprint for the copy. The sequence may also encode information. Examples are an identification of the recipient of the copy, information about the transaction that resulted in the copy being made, or encoded information about the content of the marked copy.

    摘要翻译: 通过制作一组数字表示的至少两个副本并更改副本的细分来减少数字表示中嵌入信息的计算成本,使得副本中的相应细分彼此可区分。 细分可以是任意的,也可以是数字表示的功能细分。 细分可以通过诸如不影响数字表示正常使用方式的水印的特征来区分。 然后,通过从该组副本中的一个拷贝中选择标记的副本中的给定细分来进行嵌入信息的标记副本。 可以使用具有每个细分的元素的选择字符串来进行选择。 该元素的值指示要从该元素中选择的细分中的哪个数字表示中的哪一个。 该过程的结果是标记的副本中的可区分的子序列,并且序列携带嵌入的信息。 每个标记的拷贝可以具有唯一的序列,在这种情况下,序列作为拷贝的指纹。 序列还可以编码信息。 示例是副本的接收者的识别,关于导致副本的交易的信息,或关于标记的副本的内容的编码信息。

    STEPPER MOTOR DEVICE
    47.
    发明申请
    STEPPER MOTOR DEVICE 有权
    步进电机装置

    公开(公告)号:US20090152974A1

    公开(公告)日:2009-06-18

    申请号:US12332746

    申请日:2008-12-11

    申请人: Yue LI Jian Zhao

    发明人: Yue LI Jian Zhao

    IPC分类号: H02K1/06

    CPC分类号: H02K1/145 H02K37/12

    摘要: A stepper motor device has a stator and a rotor. The rotor comprises: a shaft; a rotor core associated with the shaft; and a magnet fixed to the rotor core. The stator comprises: a stator shell; a yoke disposed within the shell; a coil wound about the yoke and an end plate magnetically connecting the yoke to the stator shell. The coil is located beside the magnet in the axial direction of the motor. The stator has a number of salient poles, and the salient poles are arranged to face the magnet across a small air gap. The coil creates magnetic poles in the salient poles with a common polarity.

    摘要翻译: 步进电机装置具有定子和转子。 转子包括:轴; 与所述轴相关联的转子芯; 和固定在转子铁心上的磁铁。 定子包括:定子壳; 设置在外壳内的轭; 围绕磁轭卷绕的线圈和将磁轭与定子壳磁性连接的端板。 线圈位于电机的轴向方向的旁边。 定子具有多个凸极,并且凸极布置成面对磁体穿过小气隙。 线圈在凸极上产生具有共同极性的磁极。

    Active Watermarks and Watermark Agents
    49.
    发明申请
    Active Watermarks and Watermark Agents 有权
    主动水印和水印代理

    公开(公告)号:US20080056531A1

    公开(公告)日:2008-03-06

    申请号:US11926427

    申请日:2007-10-29

    申请人: Jian Zhao

    发明人: Jian Zhao

    IPC分类号: G06K9/00

    摘要: Techniques for protecting the security of digital representations and of analog forms made from them, including a technique for authenticating an analog form produced from the digital representation, an active watermark that contains program code that may be executed when the watermark is read, and a watermark agent that reads watermarks and sends messages with information concerning the digital representations that contain the watermarks. A watermark agent may be a permanent resident of a node in a network or of a device or it may move from one network node to another. The watermark agent executes code which examines digital representations residing in the node or device for watermarked digital representations that are of interest to the watermark agent. The watermark agent then sends messages which report the results of its examination of the digital representations. If the watermarks are active, the agent and the active watermark may cooperate.

    摘要翻译: 用于保护数字表示的安全性和由它们产生的模拟形式的技术,包括用于认证从数字表示产生的模拟形式的技术,包含可以在读取水印时执行的程序代码的活动水印和水印 代理程序读取水印并发送包含有关包含水印的数字表示信息的消息。 水印代理可以是网络或设备中的节点的永久居民,或者它可以从一个网络节点移动到另一个网络节点。 水印代理执行代码,其检查驻留在节点或设备中的数字表示,用于水印代理感兴趣的水印数字表示。 然后,水印代理发送报告其数字表示检查结果的消息。 如果水印是活动的,则代理和活动水印可以协作。

    Obfuscation of executable code
    50.
    发明授权
    Obfuscation of executable code 有权
    混淆可执行代码

    公开(公告)号:US07263722B1

    公开(公告)日:2007-08-28

    申请号:US10019828

    申请日:2000-05-12

    IPC分类号: G06F12/14

    CPC分类号: G06F21/125

    摘要: Three new obfuscation techniques. Data field obfuscation replaces references to data fields that use an object name and a field name with references that use an object name but do not use a field name. Obfuscation using the reflection mechanism for the executable code works by replacing a construct in the executable code with one or more equivalent constructs made using the reflection mechanism. Obfuscation of externally-defined constructs is done by relating the externally-defined construct to an obfuscation for the construct that is used within the executable code. The relationship is defined in a portion of the executable code, and at least the externally-fined construct is encrypted in the portion. The various obfuscation techniques may be used with each other or with other previously-known obfuscation techniques. The disclosed obfuscation techniques are particularly well-adapted for use with the byte codes produced by Java language compilers from Java language programs.

    摘要翻译: 三种新的混淆技术。 数据字段模糊处理将对使用对象名称和字段名称的数据字段的引用替换为使用对象名称但不使用字段名称的引用的引用。 使用可执行代码的反射机制的混淆通过用可执行代码中的构造替换一个或多个使用反射机制构成的等效构造来实现。 通过将外部定义的构造与可执行代码中使用的构造的混淆相关联来完成外部定义的构造的混淆。 该关系在可执行代码的一部分中定义,并且至少外部精细构造在该部分中被加密。 各种混淆技术可以彼此使用或与其他先前已知的混淆技术一起使用。 所公开的混淆技术特别适用于由Java语言程序的Java语言编译器产生的字节代码。