公开(公告)号：US4531020A

公开(公告)日：1985-07-23

申请号：US401258

申请日：1982-07-23

申请人： Anthony J. Wechselberger ,  Leo I. Bluestein ,  Leo Jedynak ,  David A. Drake ,  Larry W. Simpson

发明人： Anthony J. Wechselberger ,  Leo I. Bluestein ,  Leo Jedynak ,  David A. Drake ,  Larry W. Simpson

IPC分类号： H04K1/02 ,  H04L9/00 ,  H04L9/08 ,  H04N7/167

CPC分类号： H04N7/1675 ,  H04L9/0833 ,  H04L9/0891 ,  H04N21/2362 ,  H04N21/26613 ,  H04L2209/601

摘要： A method of controlling the simultaneous broadcast of enciphered digital information signals, for example in a radio or television broadcast environment, to a plurality of subscribers provides several levels of enciphering keys. The broadcast digital information signal is in a broadcast common service enciphering key and communication between the transmitter and subscribers may take place in a box key or in a group enciphering key common to a group of subscribers having a common interest in the reception of broadcast signals of a particular type. Each receiver will decipher the broadcast digital information in a specific service key which is common to that broadcast. The service key may be changed at one or more subscribers by communicating the change in the service key to the subscribers by means of the group enciphering key. Further, the group enciphering key may be changed at one or more subscribers or new groups may be formed among subscribers by communicating to the subscribers in one or more group enciphering keys.

摘要翻译： 一种控制多个用户的例如在无线电或电视广播环境中同时广播加密的数字信息信号的方法提供了几个级别的加密密钥。 广播数字信息信号处于广播公用业务加密密钥中，发送方与用户之间的通信可以以对于广播信号的广播信号的广播信号的共同感兴趣的一组用户共同的方框密钥或组加密密钥进行 一种特殊的类型 每个接收机将以该广播共同的特定服务密钥解密广播数字信息。 可以通过通过组加密密钥将服务密钥的改变传达给订户来在一个或多个订户处改变服务密钥。 此外，可以在一个或多个订户处改变组加密密钥，或者可以通过在一个或多个组加密密钥中向订户通信来在订户之间形成新组。

公开(公告)号：US4531021A

公开(公告)日：1985-07-23

申请号：US640212

申请日：1984-08-13

申请人： Leo I. Bluestein ,  Paul E. Crandell ,  David A. Drake ,  Leo Jedynak ,  Larry W. Simpson

发明人： Leo I. Bluestein ,  Paul E. Crandell ,  David A. Drake ,  Leo Jedynak ,  Larry W. Simpson

IPC分类号： H04L9/00 ,  H04K1/02

CPC分类号： H04L9/088 ,  H04L9/0891 ,  H04L2209/601 ,  H04L2209/80

摘要： A system for enciphering information bearing RF signals in digital form utilizes a first key common to all receivers. There are means to change the first key which means include, at the transmitter, means to send individual messages to each receiver, each message being itself enciphered in a second key which is peculiar to only one receiver or small group of receivers and which message includes a change of the first enciphering key. At each receiver there are means responsive to the correct address in a key change message which will thereafter permit the deciphering of the key change message in the key peculiar to the particular receiver or small group of receivers. The new first key is then used at the receiver to decipher subsequent information bearing messages.

摘要翻译： 用于以数字形式加密承载RF信号的信息的系统利用所有接收机共同的第一密钥。 存在改变第一密钥的手段，其意思是在发射机处包括将各个消息发送到每个接收机的装置，每个消息本身被加密在仅一个接收机或小组接收机特有的第二密钥中，并且哪个消息包括 更改第一个加密密钥。 在每个接收机处，存在响应于密钥改变消息中的正确地址的装置，其随后将允许在特定接收机或小组接收机特有的密钥中解密密钥改变消息。 然后在接收机处使用新的第一密钥来解密随后的信息承载消息。

公开(公告)号：US06272152B1

公开(公告)日：2001-08-07

申请号：US09288835

申请日：1999-04-08

申请人： Stuart Z. Levin ,  Leo I. Bluestein

发明人： Stuart Z. Levin ,  Leo I. Bluestein

IPC分类号： H04J100

CPC分类号： H04L63/08 ,  H04L63/0823

摘要： A method and a system for authenticating an electronic financial transaction conducted between a user owning a terminal and a third party via two-way transmissions between the terminal and a cable distribution hub which includes a validation server. The method comprises the following: (a) extracting a first identification attribute of the terminal from a first transmission message sent from the terminal to the cable distribution hub, which corresponds to a first set of user identifiers residing in a database accessible by the validation server; (b) extracting a second identification attribute of the terminal from a second transmission message sent from the terminal to the cable distribution hub, which corresponds to a second set of user identifiers residing in the database accessible by the validation server; (c) comparing the first and second sets of user identifiers to validate the identity of the user; (d) interrupting the electronic financial transaction if there is a discrepancy between the two sets of user identifiers; and (e) allowing the electronic financial transaction to proceed if there is no discrepancy between the two sets of user identifiers.

摘要翻译： 一种用于通过终端和包括验证服务器的电缆分发集线器之间的双向传输来认证在拥有终端和第三方的用户之间进行的电子金融交易的方法和系统。 该方法包括以下步骤：（a）从终端发送到电缆分发集线器的第一传输消息提取终端的第一标识属性，其对应于驻留在可由验证服务器访问的数据库中的第一组用户标识符 ; （b）从从所述终端发送到所述电缆分发集线器的第二传输消息提取所述终端的第二标识属性，所述第二标识属性对应于驻留在由所述验证服务器访问的所述数据库中的第二组用户标识符; （c）比较第一和第二组用户标识符以验证用户的身份; （d）如果两组用户标识符之间存在差异，则中断电子金融交易; 和（e）如果两组用户标识符之间没有差异，允许进行电子金融交易。

公开(公告)号：US4090217A

公开(公告)日：1978-05-16

申请号：US716604

申请日：1976-08-23

申请人： Shri K. Goyal ,  Leo I. Bluestein

发明人： Shri K. Goyal ,  Leo I. Bluestein

IPC分类号： H04N9/64 ,  H04N9/535 ,  H04N5/14

CPC分类号： H04N9/646

摘要： An automatic sharpness control circuit for a color television receiver, wherein a filter having a variable filtering characteristic establishes the peaking of the frequencies forming the video signal, includes a varactor diode as the control element for the variable characteristic filter. The automatic gain control signal establishes the bias condition of the varactor diode so that the extent of peaking in the frequencies forming the video signal is automatically reduced as the strength of the video signal decreases. Accordingly, a balancing effect is created between desirable picture sharpness and the degrading effect of accentuated picture noise.

摘要翻译： 一种用于彩色电视接收机的自动锐度控制电路，其中具有可变滤波特性的滤波器建立形成视频信号的频率的峰值，包括变容二极管作为可变特性滤波器的控制元件。 自动增益控制信号建立变容二极管的偏置条件，使视频信号强度自动减小形成视频信号的频率中峰值的程度。 因此，在期望的图像清晰度和强调图像噪声的降级效果之间产生平衡效果。