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Secure Operating Systems

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Presentation on theme: "Secure Operating Systems"— Presentation transcript:

1 Secure Operating Systems
Lesson 10h: Open versus Closed Source

2 Where are we? Time for a debate: open versus closed source systems
We’ve pretty much done with a lot of the core topics, yay!

3 Open Source For the sake of discussion, what do we mean by “open source”?

4 Arguments for Open Source?
“Many eyeballs” Makes security through obscurity “impossible” Opens up code reuse… (is this a pro or a con?) Allows someone to patch their own system once a vuln is announced (can also be a con)

5 Arguments for Closed Source?
Patch management is simplified – harder to reverse engineer exploit Cost to the attacker (possibly false sense of security though) More control – paid employees Centralized

6 Data: Days of Risk? What meaningful things can we measure about OS security? Well, one is days of risk

7 Data: A Tale of Four Kernels

8 We found a vuln, oh noes! Open Source: Closed Source:

9 Modular v. Monolithic? Open Source: Closed Source:

10 To Do Read “A Tale of Four Kernels”

11 Questions & Comments What do you want to know?


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