Certificate Authorities and Public Keys. How they work and 10+ ways to hack them.

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1 Certificate Authorities and Public Keys How they work and 10+ ways to hack them. -- FoxGuard Solutions Version.05 9/2012 1

2 Certificate Use Overview 2

3 Symmetric Key Encryption Internet Reversible 3

4 Asymmetric Key Encryption Internet RSA RSA Reversible 4

5 RSA Algorithm 5

6 Hashing Non-reversible Repeatable Collision Resistant 6

7 Certificates- Additional Details 7

8 Uses of Certificates Code Signing updates Message Signing SSL /TLS https 8

9 Attacks 9

10 Attacks Against RSA RSA 10

11 Legitimate Signing of Malicious Code / Messages 11

12 Obtaining a Legitimate Signature for Someone Else via Social Engineering 12

13 Hacking a Registration Authority 13

14 Hacking the Private Key Owner 14

15 Bypassing Keys e.g. SSL Strip 15

16 Hash Collision Attacks 16

17 Implementation Failures 17

18 Addition of Certificates 18

19 Poor Random Number Generators 19

20 Social Engineering the User 20

21 Foreign Nation Strong Arm of CA 21

22 Frankenstein Style Attacks 22

23 Revocation List Attacks 23

24 Questions 24

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