2FA, WTF? at WebCamp Zagreb

Everyone is hacking everything. Everything is vulnerable. Your site, your users, even you. Are you worried about this? You should be! Don't worry, Phil is not trying to scare you (that much). You have plenty of safeguards against attempts on your applications' user data. We all (hopefully) recognise Two Factor Auth as one of those safeguards, but what actually goes on under the hood of 2FA?

You will discover how to generate one-time passwords and implement 2FA in your applications, and hear the only real-life compelling use case for QR codes. Together, we'll make the web a more secure place.

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Links:

notp package: https://github.com/guyht/notp

Authy: https://www.authy.com/developers/

Authy OneTouch: https://www.authy.com/product/options/#onetouch

Top passwords 2015: https://www.teamsid.com/worst-passwords-2015/
Ashley Madison passwords: http://cynosureprime.blogspot.ie/2015/09/how-we-cracked-millions-of-ashley.html

Have I Been Pwned? - https://haveibeenpwned.com/

Deray Mckesson Hacked - https://techcrunch.com/2016/06/10/how-activist-deray-mckessons-twitter-account-was-hacked/

How to hack Facebook with just a phone number - http://www.zdnet.com/article/how-to-hack-facebook-with-a-phone-number/

Transcript

1. 2FA, WTF?
   

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2. HACKERS
   

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3. ARE
   

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4. EVERYWHERE
   

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8. Phil Nash
   @philnash
   h p:/
   /philna.sh
   philnash@twilio.com
   

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9. 2FA, WTF?
   

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10. TWO FACTOR
    AUTHENTICATION
    

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11. Two Factor Authen ca on
    2FA is a security process in which a user provides
    two different forms of iden fica on in order to
    authen cate themself with a system.
    The two forms must come from different categories.
    Normally something you know and something you
    have.
    

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12. WHY?
    

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13. MAT HONAN
    

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14. Mat Honan's Hackers' Timeline
    1.  Found Gmail address on his personal site
    2.  Entered address in Gmail and found his @me.com
    back up email
    3.  Called Amazon to add a credit card to file
    4.  Called Amazon again to reset password and got
    access
    5.  4:33pm: called Apple to reset password
    6.  4:50pm: reset AppleID password and gained access
    to email
    

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15. Mat Honan's Hackers' Timeline
    7.  4:52pm: reset Gmail account password
    8.  5:01pm: wiped iPhone
    9.  5:02pm: reset Twi er password
    10.  5:05pm: wiped MacBook and deleted Google
    account
    11.  5:12pm: posted to Twi er taking credit for the hack
    

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16. @MAT
    

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17. WHY?
    

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19. ASHLEY MADISON
    

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20. Ashley Madison Top 10 Passwords
    1.  123456
    2.  12345
    3.  password
    4.  DEFAULT
    5.  123456789
    6.  qwerty
    7.  12345678
    8.  abc123
    9.  NSFW
    10.  1234567
    

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21. Ashley Madison Top 10 Passwords
    1.  123456 ‐ 120,511 users
    2.  12345 ‐ 48,452 users
    3.  password ‐ 39,448 users
    4.  DEFAULT ‐ 34,275 users
    5.  123456789 ‐ 26,620 users
    6.  qwerty ‐ 20,778 users
    7.  12345678 ‐ 14,172 users
    8.  abc123 ‐ 10,869 users
    9.  NSFW ‐ 10,683 users
    10.  1234567 ‐ 9,468 users
    Source: h p:/
    /qz.com/501073/the‐top‐100‐passwords‐on‐ashley‐madison/
    

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22. MARK ZUCKERBURG
    

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23. DADADA
    

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25. HOW?
    

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26. User Registra on Flow
    1.  Visit registra on page
    2.  Sign up with username and password
    3.  User is logged in
    

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27. User Log In Flow
    1.  Visit login page
    2.  Enter username and password
    3.  System verifies details
    4.  User is logged in
    

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28. SMS
    

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29. User Registra on Flow
    1.  Visit registra on page
    2.  Sign up with username, password and phone
    number
    3.  User is logged in
    

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30. User Log In Flow
    1.  Visit login page
    2.  Enter username and password
    3.  System verifies details
    4.  Verifica on code sent to user by SMS
    5.  User enters verifica on code
    6.  System verifies code
    7.  User is logged in
    

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31. PROS/CONS
    

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34. SOFT TOKEN
    

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35. User Registra on Flow
    1.  Visit registra on page
    2.  Sign up with username, password
    3.  Generate a secret for the user
    4.  Share the secret somehow
    5.  User is logged in
    

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36. User Log In Flow
    1.  Visit login page
    2.  Enter username and password
    3.  System verifies details
    4.  User opens auth app
    5.  User finds app verifica on code and enters on site
    6.  System verifies code
    7.  User is logged in
    

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37. SECRETS
    

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38. HOTP/TOTP
    

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39. HOTP
    HOTP(K,C) = Truncate(HMAC(K,C)) & 0x7FFFFFFF
    HOTP-Value = HOTP(K,C) mod 10d
    

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40. TOTP
    

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41. DEMO
    

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42. h ps:/
    /github.com/guyht/notp
    

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43. SHARING
    SECRETS
    

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44. QR code
    otpauth:/
    /TYPE/LABEL?PARAMETERS
    otpauth:/
    /totp/Example:philnash@twilio.com?secret=JBSWY3DPEHPK3PXP&issuer=Example
    

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47. PROS/CONS
    

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48. CAN IT BE
    BETTER?
    

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49. FRIENDS DON'T LET
    FRIENDS WRITE THEIR
    OWN AUTHENTICATION
    FRAMEWORKS
    

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50. FRIENDS DON'T LET
    FRIENDS WRITE THEIR
    OWN TWO FACTOR
    AUTHENTICATION
    FRAMEWORKS
    

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52. User Registra on Flow
    1.  Visit registra on page
    2.  Sign up with username, password and phone
    number
    3.  System registers User with Authy
    4.  User is logged in
    

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53. User Log In Flow
    1.  Visit login page
    2.  Enter username and password
    3.  System verifies details
    4.  Authy prompts user
    5.  User finds app verifica on code and enters on site
    6.  System verifies code with Authy
    7.  User is logged in
    

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54. THE FUTURE
    

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55. PUSH
    NOTIFICATIONS
    

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56. 0:00 / 0:21
    

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57. PROS/CONS
    

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58. SUMMARY
    

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59. USERS ARE
    BAD WITH
    PASSWORDS
    

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60. OTHER
    WEBSITES ARE
    BAD WITH
    PASSWORDS
    

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61. 2FA CAN BE
    PUSH, TOKEN
    OR SMS
    

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62. 2FA IS FOR
    YOUR USERS
    

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64. THANKS!
    

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65. Thanks!
    @philnash
    h p:/
    /philna.sh
    philnash@twilio.com
    h ps:/
    /joind.in/talk/7b975
    

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