Emails get self-destruct option
More than 200 billion emails are sent across the planet every day, and one New York-based start-up says it has a solution to keep them private.
Confidential CC is an Android and iOS app which which features self-destructing, encrypted emails that can be viewed only once.
They also cannot be forwarded or printed.
But how secure is it, and will it really take off?
Previous attempts to secure email have enjoyed only limited success.
The BBC's Richard Taylor was given a demo of the service by its co-founder Rachel Tigges.
You can follow Richard on Twitter @RichTaylorBBC.