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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.

I read that Mozilla Foundation wanted to use this form of Authentication for Webmaker. But doesn't seem like they implemented it. That's why I am curious.

closed as too broad by techraf, Steffen Ullrich, Tobi Nary, S.L. Barth, TheJulyPlot Sep 12 '17 at 9:53

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • Dear reviewers, I have edited the question to make it more specific. Please remove the hold on the question. – Saqib Ali Sep 12 '17 at 16:59
  • Part of what makes this question iffy is that you are asking if it is mainstream. What is your definition of mainstream: the hipster definition? majority consensus (>50% of what list of sites)? or did you mean mainline? – NH. Sep 13 '17 at 15:14
  • @NH. I updated the question to be more specific on what I mean by mainstream – Saqib Ali Sep 13 '17 at 18:16
  • Now you're asking for a list of sites using a specific technology, which is essentially a trivia question: you can answer it yourself by selecting a number of large sites and seeing if they use whatever pattern you want. Question b, about the security of the pattern, is on topic, but I'm fairly sure we have a question giving the pros and cons somewhere. I'll have a quick look and see if I can find it. – Matthew Sep 13 '17 at 19:10
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    Here: security.stackexchange.com/q/53346/89876 – Matthew Sep 13 '17 at 19:13
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I know https://medium.com/ is using it. They send link to your email address and you should click on it to let you use the service.

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Apparently, also a WordPress plugin exists that uses it: https://wordpress.org/plugins/passwordless-login/

However, the default version of the site uses normal password authentication.

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