Security system for a network concentrator
    3.
    发明授权
    Security system for a network concentrator 失效
    网络集中器的安全系统

    公开(公告)号:US5311593A

    公开(公告)日:1994-05-10

    申请号:US882517

    申请日:1992-05-13

    申请人: Ilan Carmi

    发明人: Ilan Carmi

    摘要: A method and apparatus for providing secure communication on open networks. Each port of the network is provided with a security entity which monitors the communication between one port to the other. End stations connected to the ports communicate with other end stations by transmitting data to the port and receiving data from the port. The data is sent out in data packets with a destination address and a source address. Each port has its own unique address. The security entity checks data packets coming into the port for a destination address. The destination address of incoming data packets is compared with the port address of the affiliated port. Also, outgoing data packets from an end station to a port are also monitored by the security entity. The security entity compares the destination and source address of the data packet with the affiliated port address. The security entity cyphers and decyphers a data portion of the data packet depending on whether or not the source address, destination address and port address match. In this way, end stations not destined to read the data portions are thus prevented from doing so. Also end stations which are not authorized to transmit onto the network are prevented from having any users on the network understand their data.

    摘要翻译: 一种用于在开放网络上提供安全通信的方法和装置。 网络的每个端口都设置有一个安全实体,它监视一个端口与另一个端口之间的通信。 连接到端口的终端通过向端口发送数据并从端口接收数据与其他终端站通信。 数据以目的地址和源地址的数据包发送出去。 每个端口都有自己独特的地址。 安全实体检查进入端口的数据包目的地址。 输入数据包的目的地址与附属端口的端口地址进行比较。 此外,从终端站到端口的输出数据分组也由安全实体监视。 安全实体将数据包的目的地址和源地址与附属端口地址进行比较。 安全实体根据源地址,目的地址和端口地址是否匹配,对数据包的数据部分进行解密和解密。 这样就能防止不注册读取数据部分的终端站这样做。 还禁止未授权传输到网络上的终端站使网络上的任何用户了解其数据。