Is universal end-to-end encrypted email possible (or even desirable)?
People expect their email to be private between them and the recipient, but in reality, the contents of your email are exposed during transmission. Full end-to-end encryption would mean that only the receiver of the email can decrypt their messages, but sharing public keys and agreeing on a common encryption standard can be tricky for most users. Plus, if email communications are fully encrypted along the entire path, then there’s no opportunity for a service in the middle, such as Gmail or Office 365, to check for spam, automatically sort emails into folders, or offer full-text searches.
Unless the platform is integrated with a company’s email gateway, firewall, and data loss prevention system, end-to-end email encryption may also prevent enterprises from monitoring for suspicious traffic. “Right now, a large number of companies just don’t have a solution dealing with encrypted email,” says Tom Fuhrman, cyber security practice leader at Marsh Risk Consulting.