Patent ID: 8607042
Filing Date: 2013-12-10
Classification: H04L

Abstract:
1. A method for controlling e-mail messages transmitted from and received by a computing site, the method implemented using a firewall implemented at least partially in hardware and comprising: selectively encrypting individual e-mail messages transmitted from an e-mail sender associated with said computing site to a first e-mail recipient via the firewall, the selective encrypting being performed under control of the firewall and in accordance with (i) a security policy associated with said computing site and (ii) at least a first recipient key associated with the first e-mail recipient; decrypting individual encrypted e-mail messages sent to a second e-mail recipient associated with said computing site, the decrypting being performed under control of the firewall and in accordance with (i) the security policy and (ii) at least a second recipient key associated with the second e-mail recipient; at the firewall, filtering said e-mail messages, after said decryption and before said encryption respectively, and in accordance with changeable filter information, the filtering comprising at least content filtering to enforce content control policies by reference to specific words in the message body, each of said e-mail messages including at least one recipient address; and transmitting at least one of said messages to at least one recipient address thereof in response to a predetermined policy result of said filter.