http://everything2.com/?node=New%20Writeups%20Atom%20Feed&foruser=caterpillar69 2000-06-25T22:02:05Z http://everything2.com/user/caterpillar69/writeups/web+of+trustcaterpillar69http://everything2.com/user/caterpillar692000-06-25T22:02:05Z2000-06-25T22:02:05Z Extension of "<a href="/title/web+of+trust">web of trust</a>" to quaternary, or <a href="/title/teralemmic+logic">teralemmic logic</a>... <p>The principle of <a href="/title/quantum+cryptography">quantum cryptography</a> says that two parties can engage in a secure conversation without having met before. It relies on there being some source of <a href="/title/entangled+pairs">entangled pairs</a> being made available to the parties... say a process creates two photons, and these are sent to <a href="/title/Alice+and+Bob">Alice and Bob</a>. Now Alice and Bob have two sets of polarising filters they can use to measure whether any the photons are polarised horizontally or vertically. Now whenever one party makes such a measurement, because they are entangled photons, the other party will not be able to get any information. By tossing random numbers, making measurements and exchanging partial information after the fact, both parties can gain increasing levels of trust in the security of the channel, and then begin to use it for encrypted conversation. Both eavesdropping and deliberate message insertion are equally difficult, and show up against the backdrop of&hellip; http://everything2.com/user/caterpillar69/writeups/tetralemmic+logiccaterpillar69http://everything2.com/user/caterpillar692000-06-24T18:06:36Z2000-06-24T18:06:36Z <p><a href="/title/Tetralemmic+logic">Tetralemmic logic</a> is one aspect of the twelve-stage chain of <a href="/title/interdependent+origination">interdependent origination</a>, a fundamental underpinning of <a href="/title/Buddhist+philosophy">Buddhist philosophy</a>.</p>