Tech startup POMM has developed a phone case which it says aims to add privacy features and biometric authentication to most smartphones.POMM says its hardware bypasses cloud based systems, providing a security and privacy platform designed to protect the data in your mobile devices.It uses an isolated add-on electronic case device, connected to the smartphone through a USB cable and “advanced isolated biometric sensors to authenticate the rightful owner of the device”.Meanwhile it also provides full encryption of all stored data in the separate add-on case flash memory and “Physiological sensors, which confirm the user is not an imposter, is alive and not under coercion”.”Users have a full range of privacy management options to ensure separate secure storage and retrieval of passwords, text messages, emails, contacts, phone logs, sensitive documents and more – preventing them from falling into the wrong hands.”