A fascinating area ZPK’s let provers prove to you that something is fact without telling you why – and it could revolutionise knowledge and “proof” sharing.


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Three German computer scientists have created a Swiss non-profit called the ZeroSync Association to help scale Bitcoin by using a relatively unknown but possibly revolutionary technology called Zero Knowledge Proof (zk-proofs) Cryptography, a cryptographic technique that has exploded in popularity on rival chain Ethereum.


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Zero knowledge proofs use cryptography to prove the validity of information without revealing the information itself – in other words they give people, the “Justifiers,” a way to trust that the information they’re receiving is true without the “Proovers” ever having to prove it. And as for why it’s as revolutionary as it is weird imagine being able to be certain that the information you’re receiving is true without ever having someone prove it … Confused? Yes. Revolutionary in today’s distributed hyper-connected world? Undoubtedly.

Using a zk-proof to validate the Bitcoin blockchain means nodes can sync almost instantly instead of taking hours and sometimes days to download the chain’s current 500GB of data.

ZeroSync has already produced a working prototype that allows users to validate the state – who owns what right now – and transaction history of the Bitcoin blockchain without downloading the entire chain or trusting a third party.


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The prototype can verify Bitcoin consensus rules but not transaction signatures. It’s also a bit clunky and still needs to be optimized for speed and security, so it’s not ready for prime time just yet, but the important thing is – it works.

“It’s very much in the prototype stage,” says ZeroSync co-founder Robin Linus. “But the grand vision is that you download that one megabyte of proof and that is as good as if you had downloaded the 500 gigabytes.”

Light clients or Simple Payment Verification (SPV) nodes have always existed on the Bitcoin blockchain. In fact, Satoshi Nakamoto mentioned the concept in his original whitepaper. They are critical for small devices like mobile phones that can’t download the entire blockchain.

“It is possible to verify payments without running a full network node,” Satoshi wrote. “Verification is reliable as long as honest nodes control the network, but is more vulnerable if the network is overpowered by an attacker.”


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ZeroSync goes a step further by verifying transactions via cryptographic proof rather than merely trusting honest nodes as suggested by Satoshi.

“You don’t have to trust, that is the entire point,” said Linus. “The proof proves it to you, that’s the great invention.”

A fully functioning zk-proof mechanism can be used to enable a wide range of applications outside of the flagship node syncing use case. ZeroSync has created a developer tool kit to enable applications like proof-of-reserves on exchanges and transaction history compression on second layer protocols like Lightning Labs’ Taro.

Linus and fellow co-founder Lukas George joined forces last July to work on implementing a full chain proof of the Bitcoin blockchain after George’s undergraduate thesis on implementing a proof of Bitcoin’s headers caught the attention of Geometry Research.


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The team subsequently added Tino Steffens to the mix; all three co-founders have a background in computer science.

Linus was living in Santa Teresa, a remote beach town on Costa Rica’s Nicoya Peninsula that has one ATM machine with a 10pm curfew. It drove Linus nuts and forced him to research alternative payment methods. He stumbled upon Bitcoin, befriended the well-respected “Bitcoin sorcerer” Ruben Somsen, who coined the term “ZeroSync,” and the rest as they say, is history.

“From there, I started to learn more and more about cryptography,” Linus said. “I developed some skills over time and then Ruben recommended me to Geometry Research. They offered me the opportunity to build STARK proofs for Bitcoin and that’s also how I got in touch with Lucas.”

About author

Matthew Griffin

Matthew Griffin, described as “The Adviser behind the Advisers” and a “Young Kurzweil,” is the founder and CEO of the World Futures Forum and the 311 Institute, a global Futures and Deep Futures consultancy working between the dates of 2020 to 2070, and is an award winning futurist, and author of “Codex of the Future” series. Regularly featured in the global media, including AP, BBC, Bloomberg, CNBC, Discovery, RT, Viacom, and WIRED, Matthew’s ability to identify, track, and explain the impacts of hundreds of revolutionary emerging technologies on global culture, industry and society, is unparalleled. Recognised for the past six years as one of the world’s foremost futurists, innovation and strategy experts Matthew is an international speaker who helps governments, investors, multi-nationals and regulators around the world envision, build and lead an inclusive, sustainable future. A rare talent Matthew’s recent work includes mentoring Lunar XPrize teams, re-envisioning global education and training with the G20, and helping the world’s largest organisations envision and ideate the future of their products and services, industries, and countries. Matthew's clients include three Prime Ministers and several governments, including the G7, Accenture, Aon, Bain & Co, BCG, Credit Suisse, Dell EMC, Dentons, Deloitte, E&Y, GEMS, Huawei, JPMorgan Chase, KPMG, Lego, McKinsey, PWC, Qualcomm, SAP, Samsung, Sopra Steria, T-Mobile, and many more.

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