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公开(公告)号：US5161189A
公开(公告)日：1992-11-03
申请号：US667151
申请日：1991-03-11
CPC分类号： H04L9/12 , H04L9/083 , H04L9/0891 , H04L2209/80
摘要： A single sync field (501) and multiple messages or message segments (503, 507, 511, and 515) are chained (407) together and encrypted (407) as a whole. When this encrypted chained message is received, it is decrypted as a whole (605), or in part (613) by setting up (609) and filling (611) a holding register with the encryption state of the encrypting device.
摘要翻译： 作为整体，单个同步字段（501）和多个消息或消息段（503,507,511和515）被链接（407）在一起并加密（407）。 当接收到加密的链接消息时，通过设置（609）并填充（611）具有加密设备的加密状态的保持寄存器，将其作为整体（605）或部分（613）进行解密。
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公开(公告)号：US4893339A
公开(公告)日：1990-01-09
申请号：US903360
申请日：1986-09-30
申请人： Michael W. Bright , Eric F. Ziolko , Alan L. Wilson , Michelle M. Bray , Harry A. Hennen , David L. Weiss
发明人： Michael W. Bright , Eric F. Ziolko , Alan L. Wilson , Michelle M. Bray , Harry A. Hennen , David L. Weiss
CPC分类号： H04L9/12 , H04K1/02 , H04L9/0656 , H04L2209/34
摘要： Disclosed is a synchronous secure communication system wherein an information signal is encrypted in an encryption means. The encrypted signal is compressed to allow the insertion of a synchronization signal, and the combined signals are transmitted. At the receiver, the synchronization signal is extracted and used to synchronize the receiver to the incoming data stream thereby improving receiver sensitivity and range.
摘要翻译： 公开了一种同步安全通信系统，其中信息信号在加密装置中被加密。 加密信号被压缩以允许插入同步信号，并且传输组合的信号。 在接收机处，同步信号被提取并用于使接收机与输入数据流同步，从而提高接收机的灵敏度和范围。
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公开(公告)号：US4893308A
公开(公告)日：1990-01-09
申请号：US903315
申请日：1986-09-03
摘要： Disclosed is a method and apparatus for time companding a digital voice signal wherein, single bits are periodically removed from the digital voice signal, which is then compressed thereby forming a contiguous area of removed bits. A synchronization signal is inserted into this area and the combined signal is transmitted. At the receiver, the synchronization signal is extracted and is used to synchronize the receiver. The digital voice signal is then expanded and the removed bits are predicted and replaced.
摘要翻译： 公开了一种用于时间压缩数字语音信号的方法和装置，其中从数字语音信号周期性地移除单个比特，然后将其压缩，从而形成连续的去除比特的区域。 将同步信号插入该区域，并传送组合信号。 在接收机处，提取同步信号并用于同步接收机。 然后数字语音信号被扩展，并且去除的位被预测和替换。
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公开(公告)号：US6141756A
公开(公告)日：2000-10-31
申请号：US067110
申请日：1998-04-27
CPC分类号： G06F21/6209 , G06F21/572 , G06F21/575 , G06F2211/007 , G06F2211/1097 , G06F2221/2147
摘要： The following describes an apparatus for and method of providing a secure method of downloading a program into a processor (101) from a device (103) external to the processor (101). The program may be encrypted (207) prior to its entry into the external device (103). The program may also have authentication information added (203 and 207) to it. Authentication information may be provided on an unencrypted and/or an encrypted program. The processor (101) decrypts (307) and/or successfully authenticates (311) the program before allowing the program to be executed by the processor (101).
摘要翻译： 以下描述了一种用于提供从处理器（101）外部的设备（103）将程序下载到处理器（101）中的安全方法的装置和方法。 程序可以在其进入外部设备（103）之前被加密（207）。 程序还可以添加认证信息（203和207）。 可以在未加密和/或加密的程序上提供认证信息。 处理器（101）在允许由处理器（101）执行程序之前解密（307）和/或成功验证（311）程序。
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公开(公告)号：US5241597A
公开(公告)日：1993-08-31
申请号：US649102
申请日：1991-02-01
申请人： Michael W. Bright
发明人： Michael W. Bright
IPC分类号： H04L9/18
CPC分类号： H04L9/065 , H04L9/0894
摘要： A method for recovering from encryption key variable loss, either inadvertent or the result of tampering. A predetermined key encryption key is encrypted with itself at the time when keys are first loaded, and the resultant key loss key is stored in non-volatile memory. This key loss key acts as a key encryption key for decryption of new shadow and traffic keys.
摘要翻译： 从加密密钥变量丢失中恢复的方法，无论是意外还是篡改的结果。 预定的密钥加密密钥在首次加载密钥时自身被加密，并且所得密钥丢失密钥被存储在非易失性存储器中。 该密钥丢失密钥用作解密新的阴影和业务密钥的密钥加密密钥。
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公开(公告)号：US4667327A
公开(公告)日：1987-05-19
申请号：US719385
申请日：1985-04-02
IPC分类号： G01R31/3185 , G06F11/18 , H03M13/23 , H03M13/43 , G06F11/10
CPC分类号： G06F11/183 , G01R31/31853 , H03M13/23 , H03M13/43
摘要： Disclosed is an error corrector for a linear feedback shift register sequence employing an open loop linear feedback shift register (LFSR) having selected bits "tapped" and combined to form a feedback signal. The taps implement an orthogonal convolutional code that is inherently redundant, therefore, the transmission of parity bits is not required. The feedback signal is combined with the received synchronization signal to form an error estimate that is temporarily stored in a syndrome register. By majority voting a selected outputs of the syndrome register a reliable determination of a received error can be made. Once an error determination is made, a correction signal is generated to correct the bit in error thereby providing a high probability of initiating and maintaining synchronization.
摘要翻译： 公开了一种使用具有选择的位“抽头”并组合以形成反馈信号的开环线性反馈移位寄存器（LFSR）的线性反馈移位寄存器序列的误差校正器。 抽头实现固有冗余的正交卷积码，因此不需要奇偶校验位的传输。 反馈信号与接收的同步信号组合，形成临时存储在校正子寄存器中的误差估计。 通过多数表决选择的校正子寄存器的输出，可以确定接收到的错误。 一旦作出错误确定，就产生校正信号以纠正错误的位，从而提供启动和维持同步的高概率。
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公开(公告)号：US08509448B2
公开(公告)日：2013-08-13
申请号：US12511731
申请日：2009-07-29
申请人： Shanthi E. Thomas , Michael W. Bright , Chris A. Kruegel , Anthony R. Metke , Scott J. Pappas , Thomas J. Senese
发明人： Shanthi E. Thomas , Michael W. Bright , Chris A. Kruegel , Anthony R. Metke , Scott J. Pappas , Thomas J. Senese
IPC分类号： G06F21/00
CPC分类号： H04L63/061 , G06F21/57 , G06F21/602 , G06F21/606 , H04L9/0822 , H04L9/0825 , H04L63/0428 , H04L2209/80 , H04L2463/062 , H04W12/04
摘要： A sending device generates a first and a second KMM, wherein the first KMM includes a first KEK and a KMM encryption key, and the second KMM includes a set of symmetric encryption keys. The sending device further encrypts the set of symmetric encryption keys using the first KEK; encrypts the first KEK and the KMM encryption key using a first public key of a receiving device; and encrypts the second KMM using the KMM encryption key to generate an encrypted second KMM before sending the first KMM and the encrypted second KMM to the receiving device. The receiving device decrypts the first KEK and the KMM encryption key using a first private key that corresponds to the first public key; and decrypts the encrypted second KMM using the KMM encryption key to obtain the encrypted set of symmetric keys.
摘要翻译： 发送设备生成第一和第二KMM，其中第一KMM包括第一KEK和KMM加密密钥，并且第二KMM包括一组对称加密密钥。 所述发送装置使用所述第一KEK进一步加密所述一组对称加密密钥; 使用接收设备的第一公钥加密第一KEK和KMM加密密钥; 并且使用KMM加密密钥对第二KMM进行加密，以在将第一KMM和加密的第二KMM发送到接收设备之前生成加密的第二KMM。 接收设备使用对应于第一公钥的第一私钥对第一KEK和KMM加密密钥进行解密; 并使用KMM加密密钥解密加密的第二KMM以获得加密的对称密钥集。
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公开(公告)号：US5809148A
公开(公告)日：1998-09-15
申请号：US649098
申请日：1996-05-17
CPC分类号： H04L9/0637 , H04L1/1809
摘要： The method generally includes the steps of receiving (201) a message (100) comprising a message indicator (101) and a plurality of encrypted blocks (103 through 111). When at least one block of the plurality of encrypted blocks is received with error, a second message is transmitted (215), which second message requests a retransmission of the at least one block. Upon receiving the retransmission of the at least one block without error, a keystream is generated (219) from the message indicator and the at least one block is decrypted using the keystream.
摘要翻译： 该方法通常包括以下步骤：接收（201）包括消息指示符（101）和多个加密块（103至111）的消息（100）。 当错误地接收到多个加密块中的至少一个块时，发送第二消息（215），哪个第二消息请求至少一个块的重传。 一旦无错误地接收到至少一个块的重传，则从消息指示符生成密钥流（219），并且使用密钥流对至少一个块进行解密。
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公开(公告)号：US5173938A
公开(公告)日：1992-12-22
申请号：US753454
申请日：1991-09-03
IPC分类号： H04L9/08
CPC分类号： H04L9/083 , H04L9/0827 , H04L9/0891
摘要： This key management system effectively solves the key distribution problems of distance, time, operator error, and security risk by transferring encryption keys with appropriate system information between a key management controller (101) and a remote keyloader (109). The keyloader (109) is then coupled to a communication device to transfer (327) the keys and receive (329) identification information from the communication device. The keyloader (109) then sends (323) the information to the key management controller (101) that controls the distribution of the encryption keys and collection of the communication device identifications.
摘要翻译： 该密钥管理系统通过在密钥管理控制器（101）和远程密钥加载器（109）之间传送具有适当系统信息的加密密钥来有效地解决距离，时间，操作者错误和安全风险的密钥分发问题。 密钥加载器（109）然后被耦合到通信设备以传送（327）密钥并从通信设备接收（329）识别信息。 密钥加载器（109）然后将信息发送（323）到控制加密密钥的分发和通信设备标识的收集的密钥管理控制器（101）。
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公开(公告)号：US5146497A
公开(公告)日：1992-09-08
申请号：US662581
申请日：1991-02-27
申请人： Michael W. Bright
发明人： Michael W. Bright
IPC分类号： H04L9/08
CPC分类号： H04L9/0833 , H04L9/0891 , H04L2209/80
摘要： This method of key distribution rekeys (605) a group of communication units (107) within an encrypted communication system with over-the-channel rekeying. The method uses a key management controller (101) to manage and distribute keys (1541) to a plurality of communication units and handle acknowledgments from the plurality of communication units that are delayed from receipt of the rekeying message. The rekeying message (615) is sent to any of the group of communication units (107) when an acknowledgment is not received (611) from one or more of the group of communication units (107).
摘要翻译： 密钥分配方法（605）在具有超频信道密钥的加密通信系统中的一组通信单元（107）。 该方法使用密钥管理控制器（101）来管理和分配密钥（1541）到多个通信单元，并处理从接收到密钥信息延迟的多个通信单元的确认。 当从一组或多个通信单元（107）未接收到确认（611）时，该密钥消息（615）被发送到该组通信单元（107）中的任何一个。
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