Complex Systems with Patrick McKenzie (patio11)5 Mars

Secrets designed to be divulged and other payment oddities

Patrick McKenzie (patio11) deconstructs the "original sin" of payments: building a global financial substrate on shared secrets that were distributed promiscuously to function. He examines the multi-decade game of Whack-a-Mole played by the industry to balance the "optimal amount of fraud" against the catastrophic conversion hit of high-friction security. From the physical failure of terminal buttons to the smartphone finally solving the lifecycle problem of cryptographic tokens, Patrick explores the technical and social reasons why we’ve moved from "something you know" to the "continuity of access" provided by the device in your pocket.

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Full transcript available here: www.complexsystemspodcast.com/secondary-auth/

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Presenting Sponsors: Mercury & Granola

If you have more interesting hobbies than managing your money, Mercury Personal is built for you. It allows you to automate movement between accounts—allocating paychecks and tax prep the moment they hit—with a sensible permissions model for partners or accountants. It works the way tech people expect banking to work. Go to mercury.com/personal to experience banking built by the same folks Patrick trusts for his business.

If meetings consistently leave you with hazy action items and lost context, Granola handles the transcription so you can actually participate and gives you searchable notes afterward. Try it free at granola.ai/complexsystems with code COMPLEXSYSTEMS

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Links:

Bits about Money: https://www.bitsaboutmoney.com/
Emily Sands on Complex Systems: https://www.complexsystemspodcast.com/episodes/the-past-present-and-future-of-ai-with-stripe/

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Timestamps:
(00:00) Intro
(01:32) Publishing the shared secret… again
(03:39) Manufacturing shared secrets at scale
(07:51) Something you own, take one
(10:10) Sponsors: Mercury | Granola
(13:48) Something you own, take two
(18:26) Something you own, take three
(21:24) One other semi-successful method: positive pay
(24:45) Wrap

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