Emails sent with Gmail’s end-to-end encryption are extremely secure because only the sender has control over the encryption key, which is stored outside of Google’s infrastructure. Users can click the padlock by the Bcc button and press Turn On under the Additional Encryption’ option to apply it.

On the 21st birthday of Gmail, Google has announced a major update that allows enterprise users to send end-to-end encrypted (E2EE) to any user in any email inbox in a few clicks.

Sending encrypted emails today involves a nightmare of certificates and administrative headaches. Google says it's ready to make things easier.