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2FA, OTP, WTF?

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An overview of 2 Factor Authentication and the TOTP algorithm used for one time passwords. Code examples in Python using https://github.com/pyotp/

Published in: Engineering
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2FA, OTP, WTF?

  1. 1. 2 FA , O T P, W T F ? @ K E L L E Y R O B I N S O N T W I L I O
  2. 2. ( 2 FA ) T W O FA C T O R A U T H E N T I C AT I O N
  3. 3. FACTORS • Something you know • Something you have • Something you are
  4. 4. ( O T P ) O N E T I M E PA S S W O R D
  5. 5. ( T O T P ) T I M E - B A S E D O N E T I M E PA S S W O R D
  6. 6. ( T O T P ) T I M E - B A S E D O N E T I M E PA S S W O R D
  7. 7. T O T P A L G O R I T H M
  8. 8. 1 . S E C R E T K E Y
  9. 9. 2 . C U R R E N T T I M E
  10. 10. 3 . S I G N I N G F U N C T I O N
  11. 11. 4 . T R U N C AT E
  12. 12. https://github.com/pyotp/
  13. 13. T H A N K Y O U ! @ K E L L E Y R O B I N S O N
  14. 14. https://tools.ietf.org/html/rfc6238 https://twofactorauth.org/ https://authy.com/ https://twitter.com/jessysaurusrex https://security.stackexchange.com/a/135953 2 FA R E S O U R C E S

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