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据《TELECOMMUNICATIONS》1993年11月号报道:美国“ANS CO+RE Sy-stems”公司最近研制出一种保密LAN互连设备,称为ANS KeyRing。该设备能使速率为56Kbps的保密以太LAN跨越公共数据网进行互连。保密LAN用户的每一信关均能产生一个唯一的逻辑专用网,且这些信关能充当路由器或透明网桥。这样保密LAN互连设备的保密功能包括:DES加密、数据资源鉴别和数据完整性校验。保密LAN之间的网间访问安
According to “TELECOMMUNICATIONS” reported in November 1993: the United States “ANS CO + RE Sy-stems” company recently developed a secure LAN interconnection equipment, known as ANS KeyRing. The device enables confidential Ethernet LANs at a rate of 56Kbps to be interconnected across public data networks. Each gateway to a secure LAN user can generate a unique logical private network, and these gateways can act as routers or transparent bridges. This confidentiality LAN interconnection device security features include: DES encryption, data resource authentication and data integrity verification. Security Inter-LAN access between the security