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From privacy coins to shiny iris-scanning orbs, zero-knowledge proofs have become synonymous with crypto, scalability and privacy.

In 2022, investors gave over $700 million in funding to companies pushing the envelope with zero-knowledge proofs. This year, ZK-proofs has arguably become one of the biggest blockchain trends, with several major Ethereum scaling protocols hitting mainnet.

ZK-proofs are a cryptographic protocol that allows one party to prove the truth of a statement to another party without sharing any of the statement’s contents. 

An often-cited example is proving to a bartender that you’re old enough to drink without showing your ID or even telling them your birthdate.

Well, it seems that Satoshi Nakamoto, the pseudonymous creator of Bitcoin, once found the technology pretty interesting.

A better version of Bitcoin

In August 2010, the user “Red” on the online forum Bitcointalk asked whether there could be a way to improve the privacy of Bitcoin transactions. 

“One of the things that bugs me about bitcoin is that the entire history of transactions is completely public,” the forum-goer said. Another member piped in, suggesting that zero-knowledge proofs could be the solution. 

“This is a very interesting topic,” replied Nakamoto.

“If a solution was found, a much better, easier, more convenient implementation of Bitcoin would be possible.”

However, Nakamoto wasn’t convinced the tech could get around the “double-spending” problem — a fundamental flaw that exists in all digital cash protocols where a bad actor could spend the same digital tokens more than once.

“It’s the need to check for the absence of double-spends that requires global knowledge of all transactions,” said Nakamoto.

Satoshi Nakamoto’s response to users suggesting ZK-proofs to raise the privacy of Bitcoin transactions. (Bitcointalk)

“It’s hard to think of how to apply zero-knowledge-proofs in this case. We’re trying to prove the absence of something, which seems to require knowing about all and checking that the something isn’t included,” he argued.

Years later, someone cracks the code

Little did Nakamoto know that the cypherpunks would eventually find a way to solve the problem.

Privacy-focused cryptocurrency Zcash was launched in October 2016 by Electric Coin — a firm made up of computer scientists from the formative years of Bitcoin. Zcash was built by modifying Bitcoin’s original source code.



It was also the first time zero-knowledge proofs were used in a real peer-to-peer cryptocurrency, allowing users to hide or shield the crypto wallet address sending or receiving funds. 

The founding scientist of Zcash, Eli Ben-Sasson, would then go on to found StarkWare, a company known today for using zero-knowledge proofs to scale Ethereum through rollups. 

Ben-Sasson tells Magazine that the early enthusiasm from Bitcoin core developers for ZK-proofs played a “pivotal role” in his eventual co-founding of StarkWare.

“The Bitcoin 2013 conference in San Jose marked my Eureka moment.”

“Mike Hearn, a then-Bitcoin developer and one of the earliest Bitcoin adopters, went as far as to declare my talk on ZK-proofs as the most crucial of the event due to its potential impact on the future of blockchain.” 

“It was there that I realized the transformative potential of the Validity Proofs I was developing,” says Ben-Sasson.

Fast forward to today, Bitcoin itself now stands ready to enter the world of ZK-proofs.

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ZeroSync, a nonprofit founded by three computer scientists (and sponsored by StarkWare), is developing the world’s first ZK light client for Bitcoin.

“Long-term, we hope to bring mass scalability to Bitcoin using STARK Proofs,” said Robin Linus, co-founder of ZeroSync. 

Linus said that ZeroSync has designed and is currently implementing a layer-2 protocol that could allow Bitcoin to process more than 100 transactions per second while bringing privacy properties to Bitcoin.

“This could be a major feat in bringing Bitcoin toward the scalability it needs.”

So what would Nakamoto think?

“It’s evident from Satoshi’s past remarks that he strongly favored the use of ZK-proofs for privacy,” says Ben-Sasson. 

Nakamoto was a stickler for anonymity. His public interactions on Bitcointalk and his emails were all reportedly done using the IP-masking browser, Tor. It’s the main reason his public IP address could never be traced back to him. 

The administrator for Bitcointalk says Nakamoto has always used The Onion Router (Tor) to access the forum. (Bitcointalk)

The Bitcoin creator even dedicated a section to privacy in the Bitcoin white paper, suggesting users keep their public keys anonymous so that, even though the public can see transactions occurring, they don’t know who is involved, like a stock exchange.

Privacy diagram as shown in the Bitcoin white paper. (Bitcoin.org)

“It’s clear that Satoshi would have been intrigued by the privacy innovations my peers and I contributed to at Zcash,” says Ben-Sasson.

Unfortunately, Nakamoto never approached the subject again before he vanished from the public eye on Dec. 12, 2010 — the date of his last post on Bitcointalk. 

Ben-Sasson, however, believes if Nakamoto had continued to be active, he would have likely pushed to bring ZK-proofs to Bitcoin

“While they have recently found their way into Bitcoin through ZeroSync, I believe Satoshi would have been inclined to make the necessary adjustments to integrate them further,” he says. 

“After all, for Bitcoin to realize its vision as a global currency, the imperative to scale cannot be ignored, especially considering its current state of ossification.”

Felix Ng

Felix Ng

Felix Ng first began writing about the blockchain industry through the lens of a gambling industry journalist and editor in 2015. He has since moved into covering the blockchain space full-time. He is most interested in innovative blockchain technology aimed at solving real-world challenges.

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£104bn of water industry investment will come from bill payers, environment secretary concedes

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£104bn of water industry investment will come from bill payers, environment secretary concedes

Steve Reed has conceded that the bulk of the £104bn of water industry investment which he boasts Labour has attracted since coming to office will come from bill payers.

In an interview with Sky News, the environment secretary sought to blame the previous Tory government for a string of high profile investors walking away from the sector over the last year.

Mr Reed does not accept claims that further threats to jail water bosses and promises to curb price rises have deterred investment.

Instead, he told Sky News that “by bringing in the £104bn of private sector investment that we secured at the end of last year, we can make sure that the investment is going in to support” the industry.

When challenged that the £104bn was total expenditure not total investment, and that bill payers would pay back this expenditure over the coming decades, Mr Reed conceded this was right – and the money ultimately is coming from bill payers.

“The money comes in from investors up front so we can do that spending straight away,” he said.

“Over decades, the investors got a modest return from the bills that customers are paying. That’s how investment works.”

Some investors have warned they do not think it viable to fund the UK water sector because of the hostile political tone of ministers and lack of certainty.

Ministers have said the government does not want to renationalise water as it would mean years of legal wrangling and cost a lot of money.

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Minister rules out nationalising the water

Labour has launched a record 81 criminal investigations into water companies over sewage dumping since winning the election last year.

Water company bosses could be jailed for up to five years and the companies fined hundreds of millions of pounds if they are found guilty.

Mr Reed committed to not interfering with those prosecutions, saying it would be “highly inappropriate” for any minister to do so.

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He rejected suggestions ministers will be pressured to ensure water bosses do not serve jail time as this will deter investors.

“It’s a judicial process, it would be highly inappropriate for any ministerial interference in the process,” Mr Reed said.

“They will work their way through the court system, as they should do, and ministers will decide on sanctions after.”

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COINS Act model law offers blueprint for crypto regulation in India

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COINS Act model law offers blueprint for crypto regulation in India

COINS Act model law offers blueprint for crypto regulation in India

Hashed Emergent’s Vishal Achanta told Cointelegraph that COINS Act aims to turn India from a “regulatory minefield” into a destination of choice for the crypto community.

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Nigel Farage says he would send violent offenders to El Salvador under crime crackdown

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Nigel Farage says he would send violent offenders to El Salvador under crime crackdown

Nigel Farage has said violent UK offenders could be jailed overseas under his plans to cut crime by half.

The Reform UK leader named El Salvador as a likely destination, though he said he has not held conversations with officials there and “multiple” partners would be considered.

El Salvador is home to a notorious mega-prison, the Terrorism Confinement Center (CECOT).

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In a speech on law and order on Monday, Mr Farage said: “It is quite astonishing that to keep a prisoner in a British prison it costs nearly £52,000 a year.

“You could send a child Eton for that price.

“So we can send some of our worst violent criminals overseas to serve their terms. If that means Ian Huntley goes to El Salvador. Well, our attitude is ‘so be it’.”

Huntley is serving a life term for the murders of two 10-year-old girls, Holly Wells and Jessica Chapman, in Soham, Cambridgeshire, in 2002.

Salvadoran police officers process alleged members of the Venezuelan gang Tren de Aragua recently deported by the U.S. government to be imprisoned in the Terrorism Confinement Center (CECOT) prison, as part of an agreement with the Salvadoran government, in Tecoluca, El Salvador, in this handout image obtained March 16, 2025. Secretaria de Prensa de la Presidencia/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. NO RESALES. NO ARCHIVES
Image:
El Salvador is home to a notorious super-max prison. Pic: Reuters/El Salvadoran government

Asked if he had spoken to any members of the El Salvadoran government about his plans, Mr Farage said he had not but “we do know they’re quite happy to take American violent offenders”.

In March, the Trump administration deported more than 130 alleged Venezuelan gang members to the CECOT while the US president has also spoken of sending “homegrown criminals” to the super max facility.

Reform UK said it wanted to create 10,000 “dynamic” prison places overall by renting cells in third party countries, at a cost of £250m per year. This would involve “multiple partners including El Salvador”, according to a document outlining the plan in further detail.

This will come alongside a number of policies aimed at cutting crime by half if Mr Farage’s party wins the next election.

The Clacton MP wants to hire another 30,000 police officers, put stop and search in every area where knife crime is prevalent and implement a zero-tolerance policy to shoplifting so every offence “however small” is prosecuted.

Mr Farage also said he would free up to 10,000 more prison places by deporting foreign criminals to their country of origin, saying he has already spoken to Albanian Prime Minister Edi Rama about this.

He said he would take back British offenders who are incarcerated overseas in return but if countries are still reluctant “we’ll make it very straightforward. We’ll just end travel”.

Mr Farage did not say how much the plans would cost or how they would be funded in his speech, which marks the start of a six week “lawless Britain” campaign.

However, in response to questions from media he said the plans would cost £17.4bn over a five-year parliament.

He said the cost of crime is far greater than that so “it isn’t really a question of can we afford to do this, it’s really a question of we can’t afford not to do this”.

He insisted he would not have to raise taxes, saying the money would come from “huge cuts” to public spending including axing HS2 and net zero policies and reducing the size of the state.

Mr Farage claimed his plans are necessary because parts of Britain are facing “nothing short of societal collapse” due to spiralling crime rates.

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Sir Keir Starmer has made halving serious violent crime one of the missions of his government, but the pledge has been somewhat overshadowed by his controversial early prison release scheme, aimed at freeing up prison capacity due to overcrowding.

A spokesperson for the prime minister said he is already deporting foreign national offenders, adding that Mr Farage’s plans are “unfunded and lack detail” and that “we are getting on with it”.

The spokesperson ruled out moving prisoners overseas, saying the government is “focused on investing and fixing prisons here”.

He added: “In the last 14 years we saw only 500 places added to prison estate and since then we have been going further to free up space in our prisons.”

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