Rethinking Privacy in the Blockchain Era

The future of blockchains is private, and this shift is happening faster than anticipated. A recent proposal by Tempo, a Stripe-backed payment blockchain, has sparked a discussion about the kind of privacy the industry will adopt. The question is no longer whether institutional chains will be private, but rather what kind of privacy will be built. The problem with public chains is that everything is visible, which is not a feature, but an existential problem for financial markets. The solution lies in private parallel blockchains, such as Tempo's Zones, or zero-knowledge cryptography, which offers a different path to privacy. The industry must now choose between privacy through trusted operators or cryptographic guarantees that require no trust at all, a decision that will determine the risk surface, compliance posture, and exposure to failure modes.