I Don't Launder Money. Why Should I Care About Anonymous Payments? A Beginner's Guide to Private Crypto Transactions

Many people assume cryptocurrency is anonymous. The reality is the opposite: with just a single wallet address, anyone can trace the holder's complete financial flows, social relationships, and movement patterns across the public chain. For advocacy organizations, civic groups engaged in cross-border collaboration, and donors and recipients who need to protect their identities, this is a severely underestimated risk.

Over the past few years, the blockchain community has developed three distinct approaches to bringing privacy back on-chain. The first was Tornado Cash, a classic coin mixer that was technically elegant but lacked any governance mechanism — leading to U.S. government sanctions and the prosecution of its developers. Privacy Pool took up the baton with a whitelist-based approach: users must obtain an "anonymous proof of innocence" before entering the privacy pool, placing compliance and privacy within the same negotiable framework. Railgun took a different route, combining a blacklist with a cooling-off period and collective detection — a design that successfully blocked the zkLend hacker's attempt to launder $9.5 million in 2025. Finally, Kohaku, a newly emerging wallet toolkit in the Ethereum community, aims to make privacy the default for every wallet, replacing individual choice with collective defense.

This talk will walk through the design logic of private financial flows in plain language, and tackle a question that matters deeply to both open source communities and civic groups: when privacy is no longer just a technical problem but a governance problem, who gets to define who is "good" and who is "bad"?

This session is for those working on digital rights and civic safety, compliance and accounting professionals seeking to understand the regulatory boundaries of cryptocurrency, open source developers curious about privacy technology but unsure where to begin, and anyone who has ever felt that something about the phrase "I have nothing to hide, so why should I care about privacy?" doesn't quite sit right.