zero-knowledge proofs

Commentary is resurfacing on the 'blockchain trilemma' — the difficulty of achieving scalability, security and decentralisation at once — which has kept blockchain from mainstream adoption. Writers point to persistent lack of transaction privacy and fragmented interoperability between networks, causing congestion, high fees and exposure of sensitive financial data. Zero-knowledge proofs are being floated as the technology that could overcome these limits.

The Ethereum Foundation has launched zkAPI, a tool that lets users pay for AI models without revealing their identity. Using zero-knowledge proofs, the service aims to combine access to artificial intelligence services with payment privacy on Ethereum. Details on pricing, partners and adoption remain limited, but the move ties Ethereum's privacy technology to the fast-growing AI payments market.

Researchers have introduced a proposal called 'Shielded Bitcoin' aimed at bringing transaction privacy to Bitcoin without requiring a network-wide soft fork. Misha Komarov, co-founder of alloc/init, explains that the design uses zero-knowledge proofs and Bitcoin PIPEs to hide on-chain transactions. The proposal is drawing attention in crypto circles, where privacy upgrades to Bitcoin have long been debated given the trade-offs between confidentiality and network consensus rules.