公开(公告)号：EP0443752A2

公开(公告)日：1991-08-28

申请号：EP91300986.6

申请日：1991-02-06

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Moroney, Paul ,  Bennett, Christopher John ,  Kindred, Daniel Ray

IPC分类号： H04L9/06

CPC分类号： H04L9/0668 ,  H04L9/0625 ,  H04L2209/12

摘要： A block-cipher cryptographic device that processes plaintext/encrypted input data with a key signal to provide encrypted/decrypted output data. Such device includes a shift register (10) for receiving input data (13); and data processing means (12), including a pseudorandom nonlinear sequence generator (32), for executing the following data processing routine a selected number of cycles to provide output data (15): processing (18, 22, 30) the contents (16) of said shift register with a key signal (14) to provide initially processed data (28); initializing the pseudorandom nonlinear sequence generator with the initially processed data; running the pseudorandom nonlinear sequence generator to generate a keystream (34); segregating (36, 38) portions of the keystream; processing (44) said segregated portions of said keystream with a portion of the data in the shift register to provide a block of processed data; and shifting said block of processed data into the shift register. To further increase the randomness of the pseudorandom keystream generator, and hence the encryption security, the data processing routine segregates the keystream in accordance with a routine (36) wherein the beginning of said segregated portion is provided at a time related to the beginning of the keystream in response to a duration indication (Y); segregates (38) every nth bit of the keystream from said beginning of said segregated portion for a selected number of segregated bits in response to a frequency indication (n); and provides said initially processed data by first processing (18) said shift register contents and said key signal and then rotating (22) data produced by said first processing in response to a rotation indication (X). The duration indication, the frequency indication and the rotation indication are each separately provided for each of the cycles and may be different for each of the cycles.

摘要翻译： 阿块密码的加密设备没有处理的明文/加密输入数据的键信号，以提供加密/解密的输出数据。 这样的装置包括：用于接收输入数据的移位寄存器（10）（13）; 和数据处理装置（12）包括用于执行以下数据处理例程循环以提供输出数据的选定数量（15）的伪随机非线性序列发生器（32）：处理（18，22，30）中的内容（16 ）的键信号（14），以提供初始处理的数据（28位的移位寄存器）的; 初始化与所述初始处理的数据，伪随机序列非线性发生器; 运行伪随机非线性序列发生器，用于产生密钥流（34）; 分离式（36，38）的密钥流的部分; 处理（44），所述密钥流与在移位的数据的一部分的被隔离的部分寄存器，以提供处理后的数据块; 和换挡处理的数据的所述块到所述移位寄存器。 祖weiterer增加伪随机密钥流发生器的随机性，因此加密的安全性，该数据处理程序偏析在雅舞蹈密钥流与worin在有关的开始的时间被设置在所述分离部分的开始处的例程（36） 密钥流响应于持续时间指示（Y）; 偏析（38）从分离位的选定数量的所述分离部分的所述起始密钥流的响应于频率指示（一个或多个）的每第n位; 并且提供所述初始处理由第一处理（18）所述移位寄存器的内容数据和所述密钥信号，然后通过旋转所述第一处理响应于旋转指示（X）制备（22）的数据。 该持续时间指示，频率指示和旋转指示各自分别设置用于每个循环的，并且可以是对于每个周期是不同的。

公开(公告)号：EP0416455A2

公开(公告)日：1991-03-13

申请号：EP90116556.3

申请日：1990-08-29

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Wachob, David E.

IPC分类号： H04N7/167 ,  H04N7/173 ,  H04N7/16

CPC分类号： H04N7/17327 ,  H04N7/162 ,  H04N7/17363 ,  H04N2007/1739

摘要： Subscriber apparatus for a cable television system or the like comprises a converter/descrambler and a programmable remote control. All authorization data for premium services and features a subscriber is entitled to receive are stored in the remote control. Program/interface apparatus is provided to enable a subscriber to request additional premium services or features, such as pay-per-view programming. Authorization data for the requested services or features are transmitted by the program/interface apparatus to the remote control via an infrared signal path. A similar signal path is used by the remote control in controlling the converter/descrambler to provide the authorized services and features, such as the descrambling of a premium television channel.

摘要翻译： 用于有线电视系统等的用户装置包括转换器/解扰器和可编程遥控器。 用户有权接收的优质服务和功能的所有授权数据都存储在遥控器中。 提供程序/接口装置以使订户能够请求额外的优质服务或特征，例如按次付费节目。 用于所请求的服务或特征的授权数据由程序/接口装置通过红外信号路径发送到遥控器。 远程控制器使用类似的信号路径来控制转换器/解扰器来提供授权的服务和特征，例如高级电视频道的解扰。

公开(公告)号：EP0343805A3

公开(公告)日：1991-03-13

申请号：EP89304575.7

申请日：1989-05-05

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Bennett, Christopher John ,  Moroney, Paul ,  Harding, Michael V.

IPC分类号： H04N7/167 ,  H04L9/00

CPC分类号： H04N7/1675 ,  H04L9/0822 ,  H04L9/0891 ,  H04L2209/20 ,  H04N21/26613

摘要： A key security system provides for the reproduction of secure keys by using distributed key generation data and a distributed encrypted prekey. The system encrypts program key generation data (17) with a program key prekey (18) in accordance with a first encryption algorithm to produce the program key (20); processes the program key (20) to produce a keystream (25); and processes an information signal (26) with the keystream to produce a scrambled information signal (27). The program key prekey (18) is encrypted with a category key (22) in accordance with a second encryption algorithm to produce an encrypted program key prekey (23). The scrambled information signal (27) the program key generation data (17) and the encrypted program key prekey (23) are distributed to descramblers. The descrambler within the key security system decrypts the distributed encrypted program key prekey (23) with the category key (22) in accordance with the second encryption algorithm to reproduce the program key prekey (18); encrypts the distributed program key generation data (17) with the reproduced program key prekey (18) in accordance with the first encryption algorithm to reproduce the program key (20); processes the reproduced program key (20) to reproduce the keystream (25); and processes the distributed scrambled information signal (27) with the reproduced keystream (25) to descramble the distributed scrambled information signal. The key generation data includes authorization data that must be processed by the authorization processor (35) in the descrambler in order to enable the descrambler. The use of authorization data as key generation data protects the authorization data from spoofing attacks. When more data must be protected than a single operation of the encryption algorithm can support, then additional data blocks are protected by chaining the system, wherein the output from one stage forms part of the input to the next. The key generation data for the program key includes a sequence number securely associated with the category key to thereby "timelock" program key reproduction to the use of a current category key and thus prevent an attack based upon the use of an obsolete category key.

公开(公告)号：EP0378306A2

公开(公告)日：1990-07-18

申请号：EP90300090.9

申请日：1990-01-04

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Gilbert, Robert C. ,  Knowles, Richard M. ,  Moroney, Paul ,  Shumate, William Allen

IPC分类号： H01L23/58 ,  G11C7/00

CPC分类号： H01L23/576 ,  G06F21/86 ,  G11C7/24 ,  H01L27/02 ,  H01L2924/0002 ,  Y10S257/922 ,  H01L2924/00

摘要： An integrated circuit chip (10) containing a secure area (11) which secure data is processed and/or stored, includes a semiconductive layer (SC) containing diffusions (S, D) defining circuit element components; a first conductive layer (CN₁) coupled to the semiconductive layer to interconnect the components to thereby define circuit elements (14, 16, 17, 18, 20, M₁, M₂, M n ) for distributing, storing processing and/or affecting the processing of secure data; and a second conductive layer (CN₂) overlying the circuit elements to thereby define a secure area (11) in which the circuit elements are shielded from inspection, and coupled to the circuit elements for conducting to the circuit elements a predetermined signal that is essential to an intended function of the shielded circuit elements, whereby removal of the second conductive layer will prevent the predetermined essential signal from being provided to the circuit elements and thereby prevent the intended function.

摘要翻译： 包含安全数据的安全区域（11）的集成电路芯片（10）被处理和/或存储，包括限定电路元件组件的包含扩散（S，D）的半导体层（SC） 耦合到所述半导体层以互连所述部件的第一导电层（CN1），从而限定用于分配，存储处理和/或影响处理的电路元件（14,16,17,18,20，M1，M2，Mn） 安全数据; 以及覆盖所述电路元件的第二导电层（CN2），从而限定其中所述电路元件被屏蔽以防止检查的安全区域（11），并且耦合到所述电路元件，以向所述电路元件传导对于 屏蔽电路元件的预期功能，由此去除第二导电层将防止将预定的基本信号提供给电路元件，从而防止预期的功能。

公开(公告)号：EP0343336A2

公开(公告)日：1989-11-29

申请号：EP89104874.6

申请日：1989-03-18

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Marz, Daniel J. ,  Schilling, John D.

IPC分类号： H03J7/04 ,  H04N5/50

CPC分类号： H04N5/50 ,  H03J7/04

摘要： An automatic frequency control tracks a television signal before and after a period of interruption. The automatic frequency control comprises a voltage controlled feedback loop including a voltage controlled local oscillator (18) and a mixer (20) for mixing the output of the oscillator (18) with the TV signal. The output of the mixer (20) is filtered to remove unwanted components of the mixed signal and to equalize sidebands of the television signal. The output of the filter (24) is supplied to a detector (30) which is tuned to a component of the television signal, and produces a voltage corresponding to the frequency of the component. The output of the detector (30) is supplied to the voltage control input of the local oscillator (18) to track the television signal component. Circuitry (71, 72) automatically senses the absence of the TV signal component from the mixer (20), and automatically applies a reference voltage (V R ) to the voltage control input of the oscillator (18) when the TV signal component is absent. The detector (30) is operative to detect the television signal component following the application of reference voltage (V R to the oscillator so that when the television signal returns, the detector (30) is capable of tracking it.

摘要翻译： 自动频率控制在中断周期之前和之后跟踪电视信号。 自动频率控制包括电压控制反馈回路，其包括电压控制的本地振荡器（18）和用于将振荡器（18）的输出与电视信号混合的混频器（20）。 对混频器（20）的输出进行滤波以去除混合信号的不需要的分量并使电视信号的边带相等。 滤波器（24）的输出被提供给被调谐到电视信号的分量的检测器（30），并产生对应于分量频率的电压。 检测器（30）的输出被提供给本地振荡器（18）的电压控制输入，以跟踪电视信号分量。 当电视信号分量不存在时，电路（71,72）自动检测来自混频器（20）的电视信号分量的不存在，并且自动地将参考电压（VR）施加到振荡器（18）的电压控制输入端。 检测器（30）可操作以在施加参考电压（VR至振荡器）之后检测电视信号分量，使得当电视信号返回时，检测器（30）能够跟踪它。

公开(公告)号：EP0266605A2

公开(公告)日：1988-05-11

申请号：EP87115198.1

申请日：1987-10-17

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Martin, Thomas F. ,  Fullingim, John P.

IPC分类号： H04N7/16

CPC分类号： H04N7/16

摘要： A cable television channel selector/descrambler enables the full capabilities of a cable-ready video appliance (e.g., television set or VCR) to be used in conjuncton with a cable television system providing unscrambled channels and scrambled premium channels. A broadband cable signal containing a plurality of television signal channels having different frequencies is passed through a filter to produce a modified cable signal having one of the signal channels removed therefrom. The broadband cable signal is input to a tuner for selectively tuning only to scrambled signal channels contained in the broadband cable signal. The tuner is tuned to a scrambled signal channel to be viewed by stepping through the scrambled signal channels accessible by the tuner until the desired signal channel is reached. A scrambled signal tuned by the tuner is descrambled and remodulated to convert it to the frequency of the signal channel removed by the filter in producing the modified cable signal. The re-modulated descrambled signal is combined with the modified cable signal to form a composite signal for input to a video appliance. The composite signal contains all of the original unscrambled channels together with the selected premium channel which has been descrambled.

摘要翻译： 有线电视频道选择器/解扰器使得电缆就绪视频设备（例如，电视机或VCR）的全部功能能够与提供未加扰频道和加扰频道的有线电视系统结合使用。 包含具有不同频率的多个电视信号信道的宽带电缆信号通过滤波器以产生具有从其中移除信号信道之一的经修改的电缆信号。 宽带电缆信号被输入到调谐器，用于仅选择性地调谐到包含在宽带电缆信号中的加扰信号信道。 将调谐器调谐到加扰信号通道，以通过步进通过调谐器可访问的加扰信号通道来观看，直到达到期望的信号通道。 由调谐器调谐的加扰信号被解扰并重新调制以将其转换为由滤波器去除的信号通道的频率，以产生经修改的电缆信号。 重新调制的解扰信号与经修改的电缆信号组合以形成用于输入到视频设备的复合信号。 复合信号包含所有原始的未加扰信道以及已被解扰的所选优质信道。

公开(公告)号：EP0768769A3

公开(公告)日：1999-06-30

申请号：EP96307354.9

申请日：1996-10-09

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Paratore, Bernardo ,  Mullins, Robert Patrick ,  Gittings, Michael J. ,  Clark, Dennis R.

IPC分类号： H04J3/06 ,  H04B10/213

CPC分类号： H04J3/0655 ,  H04J3/0682

摘要： In a Time Division Multiple Access (TDMA) communication network (10), a central office (CO) (11) provides interactive communication between a service provider and a plurality of user terminals (32). To synchronize transmissions of the user terminals, a timebase timer (20) in the CO generates modulo N-bit cyclical reference counts as time markers. In a downstream direction to the plurality of user terminals, time marker insertion units (16) in the CO receive both (a) separate digital TDMA transport streams having a predetermined data rate including data packets and Media Access Control (MAC) packets that are interspersed between the data packets at predetermined intervals, and (b) the time markers generated by the timebase timer, and insert a currently received time marker count into a concurrently received MAC packet. The resultant downstream TDMA transport streams with the inserted time marker counts in the MAC packets are transmitted in continuous TDMA output transport stream to the remote user terminals. The time markers are independent of a data rate, a physical channel, and a channel protocol of the transport stream. In each user terminal, a network interface module (34) synchronizes itself by comparing received time markers and locally generated time marker counts for correcting a local oscillator frequency. Upstream channel units (23) in the CO are synchronized using the timebase timer generated time markers for receiving and processing upstream data packets upon arrival at their preassigned channel unit.

公开(公告)号：EP0776134A3

公开(公告)日：1999-05-12

申请号：EP96118657.4

申请日：1996-11-21

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Nuber, Ray ,  Moroney, Paul ,  Walker, G. Kent

IPC分类号： H04N7/52

CPC分类号： H04N21/4392 ,  G10L19/005 ,  H04N19/895 ,  H04N21/4305 ,  H04N21/4307 ,  H04N21/4341 ,  H04N21/8106

摘要： Audio data is processed from a packetized data stream carrying digital television information in a succession of fixed length transport packets. Some of the packets contain a presentation time stamp (PTS) indicative of a time for commencing the output of associated audio data. After the audio data stream has been acquired, the detected audio packets are monitored to locate subsequent PTS's for adjusting the timing at which audio data is output, thereby providing proper lip synchronization with associated video. Errors in the audio data are processed in a manner which attempts to maintain synchronization of the audio data stream while masking the errors. In the event that the synchronization condition cannot be maintained, for example in the presence of errors over more than one audio frame, the audio data stream is reacquired while the audio output is concealed. An error condition is signaled to the audio decoder by altering the audio synchronization word associated with the audio frame in which the error has occurred.

公开(公告)号：EP0794640A3

公开(公告)日：1999-03-03

申请号：EP97100324.9

申请日：1997-01-10

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Sprunk, Eric

IPC分类号： H04L29/06

CPC分类号： H04L63/126 ,  G06F21/445 ,  G06F21/57 ,  G06F2211/008

摘要： The integrity of a group of secure processing elements (10, 20, 30, 40, 50, 60, 70, 80) in a communication system is ensured with a validation scheme. Member elements (10, 20, 30, 40, 50, 60, 70, 80) are checked by adjacent members to determine whether a member has been tampered with or operatively removed from a group. If a member is found to be untrustworthy, propagation of group characteristic information to that member will be halted. The group characteristic information defines the group, and is required by each group member in order to function. The untrustworthy member is therefore effectively exiled from the group. An efficient network topology minimizes inter-member message traffic while maintaining group robustness.

公开(公告)号：EP0829976A2

公开(公告)日：1998-03-18

申请号：EP97114204.7

申请日：1992-03-11

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Huber, David R.

IPC分类号： H04B10/18

CPC分类号： H01S3/10092 ,  H01S3/0085 ,  H01S3/0604 ,  H01S3/0627 ,  H01S3/06795 ,  H01S3/094003 ,  H01S5/0085 ,  H01S5/0608 ,  H01S5/06213 ,  H01S5/0652 ,  H01S5/4006 ,  H01S5/50 ,  H01S2301/03 ,  H04B10/2537

摘要： Non-linear effects in an optical fiber used for communicating AM signals at high power levels are reduced by increasing the linewidth of the pump laser output signal. The linewidth can be increased by optically broadening the laser output signal by driving an optical angle modulator with broadband electrical noise. The optical signal is then externally modulated with an AM information signal for transmission over an optical link fiber. The optical modulation can be provided using either an FM or PM optical modulator. A desired linewidth can be provided by controlling the optical modulation index during the optical modulation step and/or by controlling the bandwidth of the noise source. Other techniques for broadening a laser output signal, including modulating the signal by a periodic function such as a sine wave, or injecting spontaneous emissions into the laser cavity, are also disclosed.