What authentication does Facebook use?

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Tags

1. #which
2. #proprietary
3. #authentication
4. #company
5. #around
6. #password
7. #their
8. #connect
9. #username
10. #ditching
11. #facebook
12. #source
13. #implement
14. #place
15. #oauth
16. #protocol
17. #other
18. #sites
19. #system
20. #people
21. #standard