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1.发明授权System and method for interfacing risc busses to peripheral circuits using another template of busses in a data communication adapter 失效使用数据通信适配器中的总线的另一个模板将risc总线连接到外围电路的系统和方法
公开(公告)号：US5636370A
公开(公告)日：1997-06-03
申请号：US454448
申请日：1995-05-30
CPC分类号： G06F13/4027
摘要： A conversion cache circuit, interfacing RISC busses to CISC peripheral circuits, provides master/slave Write and Read operations in a shared memory (130) and in the internal registers of the processor of said peripheral circuits (210). It enables RISC processor to Write and Read in the internal registers of the 8-bit processor in a salve operation while the 32-bit processor may perform the Write or Read operations to the shared memory through the conversion cache circuit in a master mode. The 32-bit processor may have access directly to the memory through its own direct access memory mechanism.
摘要翻译： 将RISC总线连接到CISC外围电路的转换高速缓存电路在共享存储器（130）和所述外围电路（210）的处理器的内部寄存器中提供主/从写入和读操作。 它允许RISC处理器在硬盘操作中对8位处理器的内部寄存器进行写入和读取，而32位处理器可以通过主模式下的转换高速缓存电路对共享存储器执行写入或读取操作。 32位处理器可以通过其自身的直接访问存储机制直接访问存储器。
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公开(公告)号：US07203834B1
公开(公告)日：2007-04-10
申请号：US09573527
申请日：2000-05-17
CPC分类号： H04L9/0891 , H04L9/12 , H04L2209/30 , H04L2209/60
摘要： The invention discloses a method of updating, in nodes on both ends of a secure link, the encryption key they share to encrypt and decrypt data. When having to transmit data from one of the nodes towards its peer remote node, a data base in the forwarding node, is first updated from the data to be transmitted. Then, encryption is performed and data transmitted to the peer remote node while a next-to-use encryption key is derived from the new contents of the data base. When received, data are decrypted with the current value of the encryption key and the peer remote node data base is updated identically from the received decrypted data after which a next-to-use encryption key is derived, thereby obtaining in the peer remote node, a next-to-use identical key. The data base is preferably the dictionary of a data compression/decompression system used simultaneously with encryption/decryption to transmit data over the secure link. While keys are frequently updated, for improved security, the invention does not require that key updates need to be actually distributed.
摘要翻译： 本发明公开了一种在安全链路两端的节点中更新其共享的加密密钥来加密和解密数据的方法。 当必须从其中一个节点向其对等远程节点发送数据时，转发节点中的数据库首先从要发送的数据更新。 然后，在从数据库的新内容导出下一个即用加密密钥的同时，执行加密并将数据发送到对等远程节点。 当接收到数据时，利用加密密钥的当前值解密数据，并从所接收的解密数据中对等远程节点数据库进行相同的更新，之后导出下一个使用加密密钥，从而在对等远程节点获得， 下一个使用相同的键。 数据库优选地是与加密/解密同时使用的数据压缩/解压缩系统的字典，以通过安全链路传输数据。 虽然密钥经常更新，为了提高安全性，本发明不需要密钥更新需要实际分发。
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3.发明授权
公开(公告)号：US5701468A
公开(公告)日：1997-12-23
申请号：US444139
申请日：1995-05-18
CPC分类号： H03M7/3088 , G06T9/005 , Y10S707/99942
摘要： Data compression using a Liv-Zempel algorithm is enhanced by organizing strings of data in a dictionary using a set of related four related fields. The first field contains an index or codeword for the last character of the string currently being processed. The second field contains an index or codeword for a SON string, a string which includes all of the characters of the current string plus one additional character. The third field contains an index or codeword for a BROTHER string which is identical to the current string except that the last characters in the two strings differ. The fourth field contains an index or codeword for a PARENT to the current string. The PARENT includes all of the characters of the current string except the last character. The memory arrangement comprises a tree structure which can be efficiently accessed by a disclosed processor to perform data compression using minimal processing resources.
摘要翻译： 使用Liv-Zempel算法的数据压缩通过使用一组相关的四个相关字段组织字典中的数据串来增强。 第一个字段包含当前正在处理的字符串的最后一个字符的索引或代码字。 第二个字段包含SON字符串的索引或代码字，一个包含当前字符串的所有字符加上一个附加字符的字符串。 第三个字段包含与当前字符串相同的BROTHER字符串的索引或代码字，但两个字符串中的最后一个字符不同。 第四个字段包含用于当前字符串的PARENT的索引或代码字。 PARENT包括除最后一个字符之外的当前字符串的所有字符。 存储器装置包括树结构，其可以被公开的处理器有效地访问以使用最少的处理资源执行数据压缩。
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公开(公告)号：US20120195429A1
公开(公告)日：2012-08-02
申请号：US13360550
申请日：2012-01-27
CPC分类号： H04L63/0209 , H04L63/0272 , H04L63/0435 , H04L63/0464
摘要： Secure network communications via a firewall device are provided between a first device and a second device, where an encryption parameter is shared by the devices. A data packet sent by the first device may then be copied within the firewall device, so that the copy of the data packet can be decrypted within a portion of the firewall device. In particular, the portion of the firewall device in which decryption takes place is defined such that contents of the portion are inaccessible to an operator of the firewall device. Thus, scanning of the decrypted copy of the data packet for compliance with a predetermined criterion may take place within the firewall device, without an operator of the firewall device having access to the contents of the data packet to be transmitted. Thereafter, the original data packet can be forwarded to its originally intended recipient.
摘要翻译： 在第一设备和第二设备之间提供通过防火墙设备的安全网络通信，其中加密参数由设备共享。 然后可以在防火墙设备内复制由第一设备发送的数据分组，使得可以在防火墙设备的一部分内解密数据分组的副本。 特别地，定义防火墙设备中发生解密的部分，使得该部分的内容对于防火墙设备的操作者是不可访问的。 因此，在防火墙设备内可以进行符合预定标准的数据分组的解密副本的扫描，而防火墙设备的操作者可以访问要发送的数据分组的内容。 此后，可以将原始数据分组转发到其原始的接收者。
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