| The diagram below illustrates the conventional flow of email data across corporate, local area networks and the public internet. Traditionally, email messages travel across the internet unencrypted, not unlike messages on postcards. And just like postcards, everybody involved in the delivery of an e-mail message can read it without "opening the envelope" and thus without leaving any indication that the confidentiality of the message has been compromised. As the global economy moves into cyberspace, an ever increasing volume of email traffic includes information of industrial intelligence value. This information is routinely harvested by sniffer devices either at your ISP or at key routers on the internet, scanning millions of e-mails per second. If you are communicating information of commercial value, you should take active steps now to protect your communication against industrial espionage.
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