https://homeostasis.scs.carleton.ca/wiki/index.php?action=history&feed=atom&title=EvoSec_2025W_Lecture_3 2026-04-22T11:33:30Z Revision history for this page on the wiki MediaWiki 1.42.1 https://homeostasis.scs.carleton.ca/wiki/index.php?title=EvoSec_2025W_Lecture_3&diff=24958&oldid=prev 2025-01-15T16:48:05Z

<p>Created page with &quot;&lt;pre&gt; Lecture 3 --------- Perspectives on Trust G1 - waking up - do you trust that nothing bad will happen, or you just get up because you have to? - we can decouple, but can machines decouple trust from action? - continuous vs discrete trust - &quot;levels of trust&quot; - how does that affect actions G2 - game theory - prisoner&#039;s dilemma, agents are adversaries? where is the sociality of trust - not a full view - trust as black and white vs probability G3 -...&quot;</p> <p><b>New page</b></p><div>&lt;pre&gt;<br /> Lecture 3<br /> ---------<br /> <br /> Perspectives on Trust<br /> <br /> G1<br /> - waking up - do you trust that nothing bad will happen, or you just get up because you have to?<br /> - we can decouple, but can machines decouple trust from action?<br /> - continuous vs discrete trust<br /> - &quot;levels of trust&quot; - how does that affect actions<br /> <br /> G2<br /> - game theory<br /> - prisoner&#039;s dilemma, agents are adversaries? where is the sociality of trust<br /> - not a full view<br /> - trust as black and white vs probability<br /> <br /> G3<br /> - trust from creators to machines we create<br /> - humans have a sense of self preservation, that&#039;s where trust comes from<br /> - computers don&#039;t have that do they?<br /> <br /> G4<br /> - humans develop trust over time<br /> - computers make trust decisions instantly<br /> - humans &amp; computers value different things for trust<br /> - IP address vs image/voice in video call<br /> <br /> <br /> Why did I assign these readings?<br /> - see the variety<br /> - note the lack of coherent purpose<br /> <br /> game theory, prisoner&#039;s dilemma<br /> - cooperation is a bad idea<br /> - unless it is an iterated game<br /> - classic strategy, tit-for-tat<br /> - best strategy is tit-for-tat with revenge (for preserving cooperation)<br /> <br /> - but what if you already trust each other, why would you defect?<br /> <br /> Analysis vs synthesis<br /> - computer security is on the synthesis side<br /> <br /> Why do computer systems make trust decisions<br /> - so fast<br /> - without reference to past experience<br /> <br /> - too much work/effort/computation/storage?<br /> - user makes the trust decision?<br /> <br /> Traditionally, computers haven&#039;t been empowered to make trust decisions<br /> - instead, they enforce trust relationships decided by people<br /> - i.e. people create policy, computers enforce policy<br /> - in those policies, the trust associated to entities is NOT determined by<br /> the computer<br /> <br /> Why?<br /> - computers aren&#039;t autonomous<br /> <br /> Only autonomous systems can really be trusted<br /> - because they are empowered to say no<br /> <br /> What secrets will a computer never reveal?<br /> - secret keys is TPMs and similar devices<br /> &lt;/pre&gt;</div>

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