E-mail scrambling still a rare practice

When doing business, would you send your corporate plans, budgets or even personal letters to someone on a postcard? Would you mail important documents with the envelope unsealed?
You’d probably answer no, yet millions of people use electronic mail for all kinds of messages and documents without thinking about privacy issues or risk.
E-mail messages sent over the Internet hop from several different mail forwarders and dozens of packet-switching nodes on its way to the destination. A system administrator or someone who has gained privileged access to any of these transfer points can read and alter those messages.
“E-mail…