Gmail

This is an appealing technique for attackers whose malicious messages are delivered by Google

Third-party data breaches also make users more attractive targets for cyber attacks

The authentication system outage lasted for about 45 minutes and took out Google services across the world

The notifications themselves come from Google, lending some credibility to the attack

Users around the world report problems with Google's cloud services

But existing users will need to change the settings for themselves

G Suite domains lack end-to-end encryption and content can be scanned by Google for a variety of purposes, claims former employee

Users were met with a 404 error message when they tried to access the service

Google Cloud outage lasted more than four hours on Sunday and affected Snapchat, Discord, Shopify, Vimeo and Pokemon Go as well as Google's own services

Of 27 hacker-for-hire services contacted for Gmail account hacking, only five attempted to launch attacks against victims