Why is OTP used?

Related questions

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5. What is opt abbreviation?
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8. How do I get my PIN after OTP?
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Tags

1. #through
2. #factor
3. #website
4. #technological
5. #identity
6. #additional
7. #lends
8. #users
9. #protect
10. #authentication
11. #known
12. #layer
13. #digital
14. #security
15. #access
16. #mobile
17. #which
18. #mechanism
19. #generated
20. #number
21. #single
22. #password
23. #registered