A method for providing strong security in an insecure network, involving creating a payload associated with a data packet for transmission by a sending node, determining whether the payload is associated with a unicast data packet, if the payload is associated with the unicast data packet encrypting the payload using a private key associated with the sending node to obtain a unicast encrypted payload, encrypting the unicast encrypted payload using a public key associated with a receiving node to obtain a double-encrypted payload, and transmitting the data packet including the double-encrypted payload to the receiving node over the insecure network.