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A New Bitcoin Wallet Fulfills an Old Privacy Promise

“From here on out, people can’t say bitcoin is not private anymore.”

That’s how veteran developer Adam Fiscor, now CTO and co-founder of the privacy tech startup Zksnacks, described the importance of the Wasabi Wallet, set to debut on August 1.

This desktop-friendly bitcoin wallet, which can only be used with the anonymizing Tor browser, will be the first (relatively) mainstream light wallet to offer CoinJoin transactions, dispatching lots of transactions at once to obscure their sources.

First proposed by Bitcoin Core legend Gregory Maxwell in 2013, CoinJoin is one of the most prominent attempts to solve one of bitcoin’s greatest challenges: while addresses are pseudonymous, all transactions are publicly recorded on the blockchain, undermining user privacy.

While developers have been experimenting for years with improved anonymity models, Wasabi Wallet will finally make using CoinJoin as easy as flipping a switch.

Because these privacy tech projects generally avoid collecting data about their users for obvious reasons, it’s hard to determine how many people use privacy-oriented wallets. However, Samourai Wallet’s Android app, arguably the bitcoin industry’s leading privacy wallet since the project was founded in 2015, has garnered at least 27,000 downloads.

The team behind Samourai also plans to implement a type of CoinJoin feature by the end of the year, called a Whirlpool cycle. So Fiscor added another unique feature to further distinguish Wasabi Wallet.

Most bitcoin wallets actually have thousands of addresses inside, he said. But blockchain explorers like can often detect that those unique addresses share a common source since the same wallet will send an explorer balance queries on all its addresses simultaneously, tipping the user’s hand that they belong to the same person.

“That’s what we want to avoid,” Fiscor said. To do so, he applied a so-called filtering solution first proposed by the bitcoin developer known as Roasbeef, which Fiscor said enables the wallet “to query how much money is in your wallet in a way that you don’t connect your addresses together.”

With the filter, instead of pinging an explorer, “you can figure out which blocks in the blockchain you are interested in and you connect to a lot of bitcoin nodes and get one block from one node,” Fiscor said. “So basically they cannot figure out which transaction you are interested in and they cannot make statistical guesses what this random guy who asks for a block from me wants to do with that block.”

Although funds are otherwise viewable on the blockchain itself, Wasabi will be the only wallet that obscures from nodes how much bitcoin the total wallet holds. “No [other] light wallet queries the balance in a private way,” he said.

Shared values

Beyond the Japanese motifs, the Samourai and Wasabi projects have a lot in common, both in terms of values and business models.

The most obvious commonality is the privacy focus. Speaking to why he’s so passionate about privacy, Fiscor said it’s critical to the success of a currency that any individual unit is as valuable any other, no matter where it’s been, telling CoinDesk:

Fungibility is very closely related to privacy and anonymity. And we know this is a property of money, that this is a feature it needs.”

Likewise, the pseudonymous co-founder of Samourai Wallet, who goes by the initials SW, told CoinDesk his team views know-your-customer identity checks that connect bitcoin wallets to users’ government-issued IDs or bank accounts, such as those implemented by platforms like Coinbase, as a “fundamental attack on bitcoin and its users.”

These ideals have in turn shaped the two teams’ business models. They’ve both eschewed taking venture capital or raising money through an initial coin offering (ICO), two of the most popular fundraising methods for blockchain projects.

“My co-founder and I come from very well-funded, by VCs, companies in the crypto space. And that’s not something we wanted to replicate,” SW said, adding that ICOs are “a good way to distract yourself from building a good product.”

Rather, both Fiscor’s recently founded Zksnacks startup, incorporated in Gibraltar, and the un-incorporated Samourai Wallet project were self-funded until launch then accepted bitcoin donations to expand the team to roughly five people each.

SW pays contractors only in bitcoin, while Fiscor utilized two donated bitcoin to compensate independent developers.

Fiscor said self-funding allowed him to stay independent. In fact, Fiscor is so confident users want Wasabi’s CoinJoin feature that charging 0.3 percent per mixer transaction is the startup’s sole source of revenue. He told CoinDesk:

“We’re actually expecting to have a lot of income, so we’re not selling out.”

Meanwhile, economist Bálint Harmat, co-CEO of Zksnarks, agreed with SW about prioritizing the product instead of trying to make a quick profit or generate buzz.

“At first we want to make sure that the wallet is rock-solid,” Harmat told CoinDesk. “We are planning to release the 1.0 version on October 31, without outside investors. We are only going to accept investors’ money for further development of Wasabi if it is stable and we enjoy the acknowledgment of the bitcoin community.”


Given the similarities between Wasabi and Samourai, it’s not surprising that the two have collaborated.

Both privacy wallets will implement ZeroLink, an open source tool Fiscor made to help developers find a wallet’s security vulnerabilities. By working with the Samourai Wallet team on such tools, Fiscor prioritized the open source ethos over any rivalries with a formidable competitor. Taking the idea even further, both teams plan to make almost all of their software open source.

Nevertheless, they are still competitors. Evincing the rivalry, SW critiqued Wasabi’s CoinJoin feature for requiring users to wait until 100 users pooled their bitcoin together to send out at once.

“How long is that going to take?” SW asked.

These privacy wallets share at least one more thing in common: they are out of step with the trend among VC-funded blockchain startups to become more like regulated financial institutions.

Aside from recently seeking broker-dealer or even banking licenses, the industry’s unicorns are known for tracking their users’ transactions on the blockchain in order to comply with anti-money-laundering (AML) laws and international sanctions. Indeed, platforms like Coinbase often freeze accounts that accept cryptocurrency previously used on a gambling site or dark market.

That’s why around 15 percent of Samourai users utilize the Ricochet option, which adds five additional hops to a transaction until it lands at the intended destination. Wasabi’s CoinJoin feature will offer similar, although not identical, obfuscation.

On the other hand, Samourai already has many other unique privacy features, including a stealth mode that hides the application so that anyone stealing the phone won’t know it holds a bitcoin wallet. Plus, Samourai Wallet offers remote commands to wipe a stolen phone clean and transfer the wallet to another device.

Such privacy features have proven especially useful for bitcoin users in Venezuela, where corrupt officials are known to confiscate crypto-related devices.

Venezuelan Samourai Wallet user Eduardo Gomez, head of support at the crypto startup Purse who earns his salary in bitcoin, told CoinDesk he uses features like Ricochet and CoinJoin because he fears platforms like Coinbase could freeze his account if he receives a bitcoin with a questionable transaction history.

“I have no control over which bitcoin my employers send me,” he told CoinDesk, concluding:

“I really want to emphasize how important fungibility is for bitcoin. The community needs to solve that problem ASAP.”

Wasabi Wallet co-founders Lucas Ontivero (L), Balint Harmat, Gergely Hajdu, and Adam Ficsor (R) image via Zksnacks

The leader in blockchain news, CoinDesk is a media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. CoinDesk is an independent operating subsidiary of Digital Currency Group, which invests in cryptocurrencies and blockchain startups.

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China's Cheetah Mobile Launches Cryptocurrency Wallet

Chinese mobile app company Cheetah Mobile has announced its entry into the world of cryptocurrency wallets.

Launching its new SafeWallet, the firm says the so-far Android-only wallet app is designed to be user-friendly, allowing customers to easily manage their cryptocurrency assets. An iOS version is slated to follow soon.

With SafeWallet users can send and receive cryptocurrency assets, create multiple wallets and import wallets in a variety of formats, a release says. The app currently supports bitcoin and ether, with more cryptocurrencies to be supported soon, according to the release.

Cheetah Mobile, which specializes in security app products, states:

“SafeWallet employs a unique three-tiered security defense system that protects users in three key areas, including user behavior, phone security and asset management to provide maximum protection for users’ digital assets and prevent them from being lost or stolen.”

SafeWallet app, which is currently available on Google app store, enables reduced transaction fees with its “optimized transaction fee algorithm.” Also, its real-time exchange costs enables tracking digital assets’ value.

Edward Sun, SVP of Cheetah Mobile, said, “Similar to our AI strategy, we are committed to staying at the forefront of the latest technological trends, and mobile asset security is an area that we believe we can have a strong impact.”

The company stressed that SafeWallet does not access users private key, or initiate transactions on their behalf.

Cheetah Mobile already provides mobile security products such as Clean Master and Security Master, and currently claims that more than 100 million customers use its products daily.

The move comes as other mobile apps seek to tap into the popularity of cryptocurrencies.

Just yesterday, CoinDesk reported that both Square and Line Corporation are adding cryptocurrency options and services to their current payment apps.

Messaging app Kik has even gone so far as to launch its own cryptocurrency, called “kin,” aimed to power its ecosystem, as well as raise funds for the company.

Mobile in hand image via Shutterstock

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BitGo to Use Civic ID Service for Royal Mint's Digital Gold Trial

Blockchain identity startup Civic is to provide know-your-customer (KYC) services for BitGo-hosted wallets used to store Royal Mint Gold (RMG), a gold-backed cryptocurrency.

The arrangement, announced today at the Money2020 conference in Las Vegas, makes BitGo the first “full KYC partner” for Civic, according to its founder and longtime bitcoin investor, Vinny Lingham.

Civic has already been providing basic identity services, such as verifying mobile numbers and email addresses, for clients including the how-to website WikiHow, Now Lingham’s firm will be scanning and verifying documents, such as passports and utility bills, provided by investors in RMG tokens, to prove their identities and ensure compliance with anti-money-laundering laws.

Once they have completed that KYC process, however, those investors would be able to reuse their Civic identities with future partners that join the company’s network, rather than go through the same process again, Lingham said in an interview Monday. In this way, he said, the partnership could help create a network effect, since the more businesses that accept a digital identity, the more consumers will get one and vice versa.

“We chose the Civic identity solution because of their innovative underlying model which protects consumers and businesses alike,” said Mike Belshe, CEO of BitGo, a provider of multi-signature wallets, in a press release. “Civic is keeping user data safe in a way which provides higher accuracy for businesses at lower cost.”

A project of the derivatives giant CME Group and the U.K.’s Royal Mint, Royal Mint Gold seeks to streamline the trading of physical gold by using tokens on a blockchain. It will initially be available only to British residents, but will expand globally in the coming months, according to Civic.

Civic raised $33 million in a token sale earlier this year, and aims eventually to create an “identity marketplace” where businesses could be use its tokens to pay for identity verification by various providers. The startup had previously raised $2.75 million in venture funding,

Disclosure: CoinDesk is a subsidiary of Digital Currency Group, which has an ownership stake in BitGo and Civic, and has invested in Civic tokens.

Image via Shutterstock

The leader in blockchain news, CoinDesk is an independent media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. Have breaking news or a story tip to send to our journalists? Contact us at

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Gemalto and Ledger to Court Enterprises With New Cryptocurrency Wallet

Security giant Gemalto and hardware wallet provider Ledger are pooling their efforts to create a new secure storage solution for financial institutions working with cryptocurrency.

The new partnership will apply Ledger’s hardware wallet operating system (BOLOS) with Gemalto’s cryptographic key storage system (HSM) to create a device geared towards the management of crypto-assets. It’s the latest blockchain-related initiative for Gemalto, which has previously said that it is working on an IoT initiative tied to the tech and has sought intellectual property rights in the area of distributed identity.

According to a release, as well as operating as a wallet, the device will enable further applications, such as allowing financial institutions to trade cryptocurrencies and execute smart contracts.

Eric Larcheveque, CEO at Ledger, said in a statement:

“As the market value of blockchain based solutions rises, so does the need for bank-grade security products, when financial institutions are looking for dedicated, certified solutions.”

Todd Moore, senior vice president of encryption products at Gemalto, also hinted that the Gemalto-Ledger partnership could extend into securing further applications, including “smart energy applications, home automation or wearables.”

Ledger already has two digital wallet options available for the general cryptocurrency market. In March, the firm raised $7 million in a new Series A funding round.

Disclosure: CoinDesk is a subsidiary of Digital Currency Group, which has an ownership stake in Ledger.

Safe dial image via Shutterstock

The leader in blockchain news, CoinDesk is an independent media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. Have breaking news or a story tip to send to our journalists? Contact us at [email protected].