Looks like GE's FirstBuild community site is using Password Less Login pattern. For Login, they just email a custom temporary PIN to a registered email address
I am curious which other popular sites are using this pattern of Authentication? Is it mainstream? By mainstream I mean if 10 (or more) sites with large userbase (50K+ user) are using this pattern of Password Less Login.
We are currently using a off-the-shelf IAM solution for a very large user base. This off-the-shelf product doesn't support aforementioned Password Less Login scheme. I am planning to submit a Feature Request for this, but I want to first understand a) if this authentication pattern is mainstream; b) Is it NOT less secure than a static password with email based password recovery system.
Having a list of sites that are using this pattern of Authentication, will help me in making a case for the Feature Request.