It was 2000 BC, and a young man in Egypt received a document. It was a will sent by his scribe father emphasizing the importance of writing and the bright future of a scribe in government posts. It was probably the first recorded use of the postal system. Though the letter carrier may have traveled through rough terrain and (perhaps) hostile territory, the letter itself might not have been screened for malicious content.
Thousand of years later, the Chinese developed the first post house relay system and they too might not have had the need to examine documents for viruses, worms, malware, phising or other harmful content. Alas, current systems are not so lucky.
Romans developed a postal system, cursus publicus, which covered 170 miles in a day. The 19th and 20th centuries saw a network of railways, planes and automobiles cover thousands of miles and move millions of documents. Digital networks portend to cover even more ground and deliver more documents—the current volume of daily worldwide e-mails is more than 50 billion messages, and it is expected to double in few months. No doubt, it is a much more efficient and cost-effective message deliver system. Nevertheless, it comes with a unique set of threats and danger that no other postal system ever faced.
Surely, many people have tried to break-in previous postal systems, but the ingenuity of