Trezor

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Trezor rolls out coinjoin feature for its devices

April 19, 2023

3 min read

Users can now safely and intuitively strengthen their bitcoin privacy within the Trezor environment

Trezor, the original bitcoin hardware wallet company, today rolled out the coinjoin feature for its devices allowing users to more easily enhance privacy and security on bitcoin transactions. Coinjoin is a process where users send their bitcoin as part of a large collaborative transaction and receive the same amount back, but with the transaction history obscured. Users’ balances and transaction history are then hard to track on the otherwise fully-transparent bitcoin blockchain. The feature is possible thanks to Trezor’s collaboration with Wasabi Wallet, the privacy-focused bitcoin wallet that specializes in coinjoin. 

Trezor is the first and only hardware wallet to enable coinjoin transactions within a hardware wallet environment. The function is now live on Trezor Model T and Trezor plans to enable coinjoin for Model One in the near future. Coinjoin is the latest addition to a host of features found on Trezor devices for enhancing security and privacy, such as Tor, coin control, and Shamir backup.

Matěj Žák, CEO of Trezor, explained:

“Trezor values privacy as an individual’s most important asset. Consequently, we’re delighted that we’ve found a way for our community to keep their bitcoin history private. Our coinjoin solution in Trezor Suite is intuitive and safe, making bitcoin privacy more accessible to the general public.”

Real use-cases

The coinjoin approach tackles a number of glaring privacy issues resulting from the inherent transparency of the bitcoin blockchain. For example, when people use exchanges, it’s easy to draw a link between their real-world identity and their bitcoin addresses. Exchanges can track user transactions even after they withdraw, and can share this data with third parties. Through obscuring transaction histories, coinjoin prevents such surveillance. 

Secondly, coinjoin offers welcome additional protection when using bitcoin for purchases. Ordinarily, merchants receiving bitcoin payments can see the total balance of an address from which the payment was sent, which some people consider an unacceptable breach of privacy. With coinjoin, users can safely break up their bitcoin balance into small amounts with no transaction history so as to obscure their total balance, like swapping a large dollar note for smaller denominations. 

A third coinjoin benefit is in safeguarding privacy for donations made using bitcoin. By default, all bitcoin transactions can be analyzed and in some cases, real-world identities can be linked. This can put non-governmental organizations and their donors in great danger, especially under authoritarian regimes. Coinjoin protects the transactions of donors and recipients, and therefore, improves the safety of organizations and their supporters. 

Matěj Žák further elaborated:

“People who want to make private transactions can use cash without leaving any digital footprint, and without the need for the counterparty to store our identity. No one gets to see how much money they have left in their wallet or bank accounts. Trezor with coinjoin brings a similar level of privacy to bitcoin, with one click. The security of the process and ease of use help deliver privacy to a wider audience, which is one of the core values of the bitcoin community.”

“Making bitcoin privacy tools easy to use and secure is essential, as this is what drives people to use products, which increases the privacy for everyone. That’s why we see Trezor’s integration of coinjoin as such a major milestone. A coinjoin is inherently non-custodial, and now for the first time coinjoin transactions can be signed with the keys on a hardware wallet. This is a major security improvement,”

says Max Hillebrand, contributor to Wasabi Wallet and CEO of zkSNACKs. (zkSNACKs is the company sponsoring the development of Wasabi Wallet and operates the coinjoin coordinator)

How does it work?

With the Model T, Trezor users can now see a new coinjoin account type in their Trezor Suite, and simply click on the “anonymize” button. Users then choose the number of coinjoin rounds — with every round increasing the level of privacy — confirm their choices on the Trezor device, and then leave the Trezor connected with the Trezor Suite running. The rest of the coinjoin process is automated and requires no active user participation. The time needed to complete the coinjoin depends on the number of rounds - one round takes approximately 10 minutes. After completing the procedure, users will receive a confirmation dialogue with the transaction details. The fees for the transaction consist of the coordinator fee of 0.3% of the coinjoined amount and a network mining fee. The coordinator fee is paid just once, and for further remixes users pay only the mining fee.

For more information about coinjoin, please visit: https://trezor.io/learn/a/coinjoin-in-trezor-suite 

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About Trezor

Trezor is the independent Czech company behind the world's first Bitcoin hardware wallet, the Trezor One in 2014. Its flagship product, the Trezor Model T comes with a full-color touchscreen and many advanced features. Both wallets are open-source and enhanced by the free Trezor Suite app which increases privacy and makes crypto more intuitive.


About Wasabi Wallet

Reclaim your privacy with Wasabi Wallet, a free and open source bitcoin wallet with built-in coinjoin. Coinjoins are collaborative bitcoin transactions to enable cash-like privacy features for bitcoin. wasabiwallet.io

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Jan Pleskač Steps Back into Leadership at Tropic Square

Tropic Square

2 min read

Tropic Square is entering the next phase of its development, with co-founder Jan Pleskač returning to lead the company. Jan, who has served as CTO up until now, will shift his focus even more toward the company’s strategic growth and product vision. His deep expertise in technology and product development, along with his comprehensive understanding of the company and its mission, will ensure a smooth leadership transition and support continued growth.

Jan takes over from John Sirianni, to whom sincere gratitude is extended for his valuable know-how and contributions to Tropic Square, particularly in finalizing the patent and launching the company’s first product, TROPIC01.

“This year, we officially introduced our first product TROPIC01 at the Embedded World conference, where it achieved remarkable success. It even won the Embedded Award in the Safety and Security category for its innovative contribution to the industry, and we distributed over 300 developer kits. The feedback from the community has been incredible, confirming the excitement surrounding our new chip. We want to thank John for his dedication and hard work on TROPIC01, and we wish him great success in his next chapter," said Jan Pleskač, the CEO of Tropic Square.

Tropic Square is ready for the next stage of growth, and the entire team, which is part of the SatoshiLabs technology group, is excited to embark on this new chapter.

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About Tropic Square

Tropic Square, a SatoshiLabs company, develops open-architecture secure elements for applications ranging from IoT and crypto wallets to any modern application that prioritizes security. 

By placing transparency at the core of our design philosophy, we invite industry experts and members of the open-source community to test, validate, and strengthen our security implementation. 

For more information, visit www.tropicsquare.com

For all media inquiries, contact pr@tropicsquare.com 

Tropic Square Secures Double Win at Embedded World 2025

Tropic Square

2 min read

Tropic Square proudly announces that its flagship product, TROPIC01, has been honored with two awards at this year’s Embedded World Exhibition & Conference held in Nuremberg, Germany from March 11 to 13. The team received the prestigious Embedded Award 2025 for Safety and Security, as well as the Best in Show Award.

The Embedded Award recognizes outstanding innovations in secure embedded system technologies, highlighting products that set new standards in quality and functionality while enhancing safety and security in an increasingly connected world. TROPIC01 stood out among the nominations for its auditable open architecture design that delivers unprecedented transparency and open verification of security features. Tropic Square also received the Best in Show award for the innovation that TROPIC01 brings to the market.

"Receiving these awards is a testament to our commitment to redefining hardware security," said Jan Pleskac CEO & Co-founder of Tropic Square. “TROPIC01 addresses the critical need for transparent and verifiable security solutions in today's digital landscape. This recognition reinforces our mission to set new standards in the industry."

Designed to be tamper-resistant against advanced physical attacks, TROPIC01 is the industry’s first auditable open architecture secure element. The product addresses the concern of secure hardware having backdoors or hidden flaws by providing transparent access to the design and documentation for anyone to independently conduct security reviews, audits, and testing.  

For more information about TROPIC01 and Tropic Square's commitment to open-source hardware security, visit https://www.tropicsquare.com/tropic01.

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About Tropic Square

Tropic Square, a SatoshiLabs company, develops open-architecture secure elements for applications ranging from IoT and crypto wallets to any modern application that prioritizes security. 

By placing transparency at the core of our design philosophy, we invite industry experts and members of the open-source community to test, validate, and strengthen our security implementation. 

For more information, visit www.tropicsquare.com

For all media inquiries, contact pr@tropicsquare.com 

Tropic Square Announces Official Launch & General Availability of TROPIC01

Tropic Square

2 min read

A New Era of Secure Elements Built on Transparency and Verifiable Trust.

Tropic Square, a fabless semiconductor company that develops secure hardware through open architecture, today announced the official launch and general availability of its first-generation secure element, TROPIC01.



TROPIC01 is the industry's first open-architecture hardware security element. The chip is auditable and designed to meet the increasing demand for transparency in hardware security. This tamper-proof solution offers a secure alternative to existing closed architecture chips, making it ideal for the security needs of IoT devices, crypto hardware wallets, digital identity devices, and hardware authenticators.

“TROPIC01 provides the disruption that traditional hardware security needs,” stated John Sirianni, CEO of Tropic Square. “It’s the industry's first auditable, open-source solution – transparency to this degree has been unheard of to date. With the evolving sophistication and frequency of cyber threats and increasing regulatory demands, transparency is no longer optional—it’s essential. TROPIC01 provides the semiconductor innovation that the market is demanding.”  

Considering that cybercrime is reported to cost the world an estimated $13.82 trillion by 20281, there is an urgent need for robust security elements such as TROPIC01. Providing advanced security against side-channel, laser, and other advanced attacks, TROPIC01 has been developed with fully verifiable cryptographic implementations, granting enterprises and developers unprecedented control over their security infrastructure.

“We are excited to launch the industry's first truly open and auditable secure element chips,” said Jan Pleskac, CTO and Co-Founder of Tropic Square. “Existing closed-source secure elements don’t allow for auditing; hence engineers and security experts cannot confirm whether vulnerabilities or backdoors exist. TROPIC01, on the other hand, allows engineers to verify the security implementation for themselves, giving them confidence in what they are embedding into their devices.” 

TROPIC01’s open architecture allows electronic manufacturers and designers to verify the security implementation and claims. This provides engineers more control of their design process without being restricted by NDAs or the limitations of traditional black box secure elements. 

“This chip is exactly what the security industry needs,” said Miro Sveltik, CEO of ContentWise, a Deep Tech design house currently prototyping with TROPIC01. “Security is critical for our customers. We cannot truly stand behind solutions we offer to the market unless we can verify its security implementation.” 

TROPIC01 supports use cases such as secure boot, firmware updates, and key management– critical security features that enable product readiness for compliance with regulations such as the European Cyber Resilience Act (CRA). 

TROPIC01 chips general availability
TROPIC01 chips general availability
Product Availability & Shipping

TROPIC01 development kits and engineering samples have been available since early February 2025, and now the chip is available for wide-scale production orders.  Secure provisioning, customization, and shipping logistics are managed in partnership with EPS Global.  

Companies building secure devices such as blockchain-enabled hardware, DePIN solutions, and IoT devices (including industrial, medical, etc.) can order TROPIC01 samples to evaluate product feasibility.

Awards and Recognition – Embedded World Nuremberg 11-13 March 2025

In recognition of its innovative approach to safety and security in embedded systems, TROPIC01 has been nominated for an Embedded Award in the Safety and Security category. The Embedded Awards honour outstanding innovations in the field of secure embedded technologies, highlighting products that set new standards in quality and functionality.

At the Embedded World 2025 event in Nuremberg, Germany, Tropic Square will offer live demonstrations of TROPIC01's capabilities and provide insights into its development process. Attendees are invited to visit the Tropic Square booth (5-373) to learn more about how TROPIC01 can enhance the security of embedded systems.

Additional information about TROPIC01 can be found at:

https://www.tropicsquare.com/tropic01

TROPIC01 nominated for innovative designs in the Safety & Security category for Embedded World 2025

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About Tropic Square

Tropic Square, a SatoshiLabs company, develops open-architecture secure elements for applications ranging from IoT and crypto wallets to any modern application that prioritizes security.

By placing transparency at the core of our design philosophy, we invite industry experts and members of the open-source community to test, validate, and strengthen our security implementation.

For more information, visit www.tropicsquare.com  

For all media inquiries, contact pr@tropicsquare.com

1 https://www.statista.com/chart/28878/expected-cost-of-cybercrime-until-2027/

SatoshiLabs Welcomes Ladislav Veselý as New COO

SatoshiLabs

2 min read

Defining the strategy for the holding group, building the best HR team in the Czech Republic, and supporting the founders and CEOs of individual companies are all ambitious goals Ladislav Veselý is bringing to SatoshiLabs as its new COO. Veselý enters this new chapter with years of leadership experience, having served as the CEO of Slevomat Group and Product Division Director at Seznam.cz.

"I was motivated by the opportunity to step into a completely different environment. After five years with one company, I was looking for a new industry, a different stage the company is currently in, and a new sense of purpose. I’m also inspired by the founders’ values and their focus on people and product quality. At SatoshiLabs, money isn’t the goal; it’s the energy that drives everything. This alignment made the decision easy for me, and I’m excited about this new chapter," says Veselý.

From Operations to Leading Three Companies

Veselý spent nearly five and a half years in leadership roles at Slevomat. After just one year as COO, he was promoted to CEO, eventually overseeing all three companies in the group. He considers Slevomat’s post-pandemic business performance his greatest professional achievement.

"I’m proud that Slevomat emerged from the pandemic as the strongest Czech travel brand, achieving record profits and profitability. At that time, the company was generating the vast majority of the European group’s profits," Veselý reflects.

He also credits his time at Seznam.cz as one of the most formative periods in his career, where he gained valuable experience in product development, agile methods, and team learning and development. Veselý also served as Chief Product Officer (CPO) at the publishing house Economia.

Building a Strong HR Team and Supporting Leadership
"What drew me to SatoshiLabs was a combination of factors: the team’s strong internal motivation, the truly global reach of the company, and the emphasis on personal freedom that comes with responsibility. Honestly, I feel like I’d work here even if they were making rubber ducks. The fact that we have four bootstrapped companies with global products is just the icing on the cake—and a huge source of motivation. The quality, passion, and trust I’ve sensed in just a few days are unlike anything I’ve experienced before," Veselý adds.

In addition to supporting the CEOs of the companies within the group, Veselý plans to define the group’s strategy and build the strongest HR and operations team in the Czech Republic.

"We wanted the new member of our leadership team to not only have extensive experience in operational management and a strong understanding of the holding environment and business-building processes, but also exceptional people leadership and development skills. Ladislav offers a unique combination of these qualities. His experience leading Slevomat and his approach to managing teams and companies will undoubtedly help us grow further," said Marek Palatinus, co-founder of SatoshiLabs.

About SatoshiLabs

SatoshiLabs is a global technology group focused on cryptocurrency and open-source innovation. Its founders, Marek Palatinus and Pavol Rusnák, created Trezor—the world’s first cryptocurrency hardware wallet—and turned it into a billion-dollar business. The group also includes Vexl, a P2P Bitcoin trading app without KYC requirements; Invity, a mobile app for buying, selling, and saving Bitcoin and cryptocurrencies; and Tropic Square, which designs and develops unique transparent security chips.