Google is said to be looking into ways to make end-to-end encryption tools such as PGP (Pretty Good Privacy) easier to use with Gmail. The utility is already compatible with Gmail but its complex nature has kept it from reaching a mainstream audience. How exactly Google plans to integrate PGP into Gmail is a bit of a mystery as it poses some pretty significant issues. With end-to-end encryption, only the sender and receiver can read the contents of a message. 

That'd be problematic for Google as the company currently scans Gmail messages for advertising keywords. What's more, Google would have to contend with the issue of lost passwords. Under such a scenario, only the end user would ever have access to the decryption key meaning the provider couldn't recover data without it.

Google is considering end-to-end encryption for Gmail