Ecash Makes Bitcoin — And CBDCs — Private With Calle’s Cashu

Editor’s word: Cashu is a protocol, not an organization.

Founders: Calle

Date Based: October 2022

Location of Headquarters: Distant

Quantity of Bitcoin Held in Treasury: N/A

Variety of Workers: 20-30 open-source builders

Web site:

Public or Private? N/A

Of Bitcoin’s many notable properties, privateness isn’t one in every of them.

The truth is, the transparency of the Bitcoin blockchain contrasts starkly with the privateness that Chaumian ecash, a type of digital money created by legendary cryptographer Dr. David Chaum in 1982, presents.

So, what do these two applied sciences should do with each other?

Effectively, 40 years after the invention of ecash and after a failed attempt to combine it into the standard monetary infrastructure within the Nineties, a developer who goes by the pseudonym “Calle” discovered a spot for the know-how inside the Bitcoin ecosystem.

“Ecash was waiting for Bitcoin as a foundational layer,” Calle informed Bitcoin Journal. “Bitcoin represents a permissionless system on which anyone can build financial innovation without having to consult the big banks. It’s just a way better environment to experiment with this technology.”

Calle has been innovating with this know-how through Cashu, a free and open-source ecash protocol he launched into the world in October 2022. With Cashu, customers get the very best of each the Bitcoin and Chaumian ecash worlds.

And whereas readers of this publication are seemingly already accustomed to how Bitcoin works, ecash could also be a brand new idea.

What Is Ecash?

Ecash is a bearer asset that may be transferred peer-to-peer, very similar to bitcoin.

Nevertheless, a key distinction between ecash and bitcoin is that bitcoin exists on a ledger, whereas ecash lives on its holder’s machine.

“Ecash is for us Bitcoiners a very alien concept because it flips the concept of a ledger on its head,” defined Calle.

“In an ecash system, the state of who owns what is determined by who has ecash in their pockets, not ‘What does this database say about who has what?’” he added.

On a extra technical degree, ecash tokens are basically IOUs which are minted utilizing a know-how known as “blind signatures.”

With Cashu, extraordinary customers can function a mint through the Lightning Community utilizing this information, written by Calle.

Calle’s Motivation In Creating Cashu

You may suppose that somebody who hides their face behind a brilliant orange face wrap when making media appearances can be motivated by fairly radical ideology, however this isn’t the case with Calle.

As an alternative, he’s surprisingly down-to-earth, sensible and extremely logical. His objective in constructing Cashu is solely to protect the kind of privateness we’ve had in monetary transactions for hundreds of years.

“We used financially-private instruments for hundreds of years without realizing that we use one of the best technologies in financial privacy — physical cash,” mentioned Calle.

“So, it’s not really like we’re trying to bend towards something that we haven’t experienced. We’re just preserving the things that we already enjoy,” he added.

Calle needs to see Chaumian ecash succeed regardless of the challenges it confronted when Dr. Chaum tried to implement it into the standard monetary system through his firm DigiCash within the ‘90s.

“Chaumian ecash had a very big mission,” said Calle.

“It should have revolutionized the entire financial world. But, unfortunately, PayPal and Visa took over,” he added.

“I’m also being pragmatic in that I’m choosing to build this on Bitcoin because first. Bitcoin is the only world where you can start building something like this open source.”

Ecash On Bitcoin

Part of Calle’s goal in constructing Cashu on Bitcoin is to get extra individuals utilizing bitcoin for on a regular basis transactions.

“Bitcoin needs to be carried by diverse groups of people, so we can get the normies to see the enormous potential that this technology gives,” he mentioned.

He additionally believes that in onboarding extra individuals to Bitcoin, we needs to be extra measured in our method and let the know-how itself do the speaking.

“You don’t have to be against the state to love Bitcoin. You don’t even have to believe in separating money from state,” he mentioned.

“Ideology spreads way more slowly than technology. Technology can explode overnight,” he added.

“Just explain to people that we have found the money of the internet. This happens once only in the history of the internet, and we have crossed that line. Let’s spread that message.”

Once I requested Calle if he thought the latest crackdown on the Samourai Pockets builders may put a privacy-focused protocol constructed on Bitcoin like Cashu within the crosshairs of regulators, he didn’t reply immediately, however he additionally didn’t appear significantly frightened, as he identified that the standard monetary system is on the verge of using ecash, as effectively.

Ecash Past Bitcoin

“In Europe, we have very active discussions about what CBDC will look like here,” defined Calle.

“The ECB is willing to also look into ecash systems that provide cash-like privacy for transactions under 300 euros. The Bank of International Settlements is piloting an ecash system right now. The National Bank of Switzerland and the Swiss Parliament itself are considering ecash deployments for their national digital currencies,” he added.

“We see that there is a window of perfectly legal and compliant use of ecash.”

In accordance with Calle, any ranges of enhanced privateness that include utilizing ecash — whether or not on Bitcoin or inside conventional monetary buildings — is a internet optimistic for whoever makes use of the know-how.

Who Will Use Ecash?

Very like Bitcoin, ecash is for everybody. Extra particularly, it’s for many who need to make digital funds privately.

“The Achilles heel of digital payments is that all payments are tied to identities,” defined Calle. “There is no reason why you need to have KYC to read an article on These online activities should not connect to our bank account, especially if you’re reading political articles.”

Nostr customers are already utilizing ecash minted on Cashu in a number of privacy-based chat purposes, in line with Calle.

It’s additionally getting used as a cost to stop denial of service (DoS) assaults in some circumstances, whereas different customers are utilizing it to pay for VPNs with out disclosing their id.

Calle appeared most enthused, although, when he mentioned how the unbanked or those that have been debanked due to their political affiliations can use ecash.

“I think a lot about how this can become local banking infrastructure in parts of the world where there are no banking systems and or banking systems are so prohibitive that dissidents and political activists basically cannot use any digital money,” he mentioned.

For such circumstances, Calle additionally described how he can create a system that points fiat-denominated ecash backed by bitcoin.

“We can build fiat payment experiences without touching the fiat banking system at all in the most private and fast and efficient way that is very close to physical cash, but it is all still built on Bitcoin. That makes me very excited because stablecoins are extremely popular and they have also taken over the popularity of bitcoin in most parts of the world,” he added.

“There is just a clear demand for it and fiat on ecash is the best form of fiat that I can think of.”

Proceed With Warning

Whereas there are an a variety of benefits to utilizing ecash, it’s additionally essential to watch out when utilizing the know-how.

On condition that ecash is minted by way of a custodian, there’s counterparty danger related to utilizing it.

“I would urge anyone to be very cautious about the custodian that they choose,” warned Calle, who supplied a caveat to his assertion, explaining how the crew behind Cashu is making an attempt to offset a few of the danger related to trusting a mint by making a star ranking system based mostly on repute for them.

“We recommend to anyone using Cashu: Use it for very small amounts. Use it like a wallet in your pocket so that if you lose it at the bar, it won’t hurt you too much,” he added.

He went on to state very clearly that “when a mint goes down, your sats are gone.”

There may be additionally some danger in dropping your funds in the event you lose the machine on which they’re saved, however Cashu has created a solution to restore misplaced ecash.

“In Cashu itself, there is a mechanism to restore your tokens if you lose them, similar to Bitcoin UX where you store a seed phrase,” Calle defined.

Nevertheless, he additionally identified that customers restore their funds by way of the mint and that, once more, if the mint goes down, customers lose their tokens completely.

Name To Motion

Calle doesn’t revenue from his work with Cashu. He began the undertaking as an “academic interest” and has pushed ahead as a result of he finds nice goal in creating it.

“Working on Bitcoin is a big honor and opportunity that gives life meaning, because it’s a project for humanity,” he defined.

“It’s beautiful to be a little part of this process, knowing that you work on something day-to-day that improves the world and doesn’t feed big mega tech companies while they’re sucking the life out of your body.”

So, not solely does he encourage you to make use of Cashu in the event you’re in search of larger privateness in your on a regular basis bitcoin transactions, however he invitations builders — or anybody with any expertise pertinent to driving Bitcoin adoption — to hitch him in serving to to additional Bitcoin adoption.

“I know so many people with this desire to work on something that makes the world a better place, and Bitcoin is an open system that invites anyone with any skill level to participate,” mentioned Calle.

“For those in the big tech industry whose work has lost meaning, this is an opportunity to work on something meaningful, global and inclusive,” he added.

“Join us as we go to the moon.”

DailyBlockchain.News Admin

Our Mission is to bridge the knowledge gap and foster an informed blockchain community by presenting clear, concise, and reliable information every single day. Join us on this exciting journey into the future of finance, technology, and beyond. Whether you’re a blockchain novice or an enthusiast, is here for you.
Back to top button