These security guarantees are difficult to establish in a network without persistent connectivity because the network hinders complicated cryptographic protocols, hinders key exchange, and each device must identify other intermittently visible devices.
这些安全保证很难在没有持久连接的网络中建立，因为网络阻碍了复杂的加密协议，阻碍了密钥交换，并且每个设备必须识别其他间歇性可见设备。