SEALCOIN Demonstrates Satellite-Enabled IoT Transactions Using WISeSat LEO Constellation

Pushing the Frontiers of IoT with Secure, Decentralized Microtransactions Beyond Terrestrial Limits

Geneva, Switzerland, April 11, 2025 –WISeKey International Holding Ltd (“WISeKey”) (SIX: WIHN, NASDAQ: WKEY), a leading global cybersecurity, blockchain, and IoT company, today announced that its subsidiary SEALCOIN AG, unveiled a groundbreaking Proof of Concept (PoC) that illustrates the Company’s ability to integrate with remote IoT devices through satellite communications. Leveraging the WISeSat Low Earth Orbit (LEO) constellation and the FOSSA IoT platform, this milestone marks a major step toward SEALCOIN’s vision for a decentralized, transactional IoT that transcends terrestrial infrastructure.

Built on WISeKey’s satellite infrastructure, the PoC enables microtransaction-driven data exchanges between fully off-the-grid IoT devices, with each data set cryptographically signed at the source device for integrity and trust.

The architecture operates as follows:

• Device-to-Device Exchange via Satellite: A request for data is initiated by one IoT device and fulfilled by another using SEALCOIN as the value exchange layer.
• REST API Integration with WISeSat via FOSSA: The responding device acts as a bridge to the WISeSat network through a REST API, retrieving data from the satellite-linked database, which has been securely signed by the source device.
• Blockchain Settlement via SEALCOIN on Hedera: Each exchange is recorded and settled securely and efficiently via the SEALCOIN token on the Hedera network.
  
  

This PoC proves the feasibility of executing secure, decentralized, satellite-enabled data transactions between machines in geographically isolated or infrastructure-deficient environments. The implications for smart agriculture, environmental monitoring, autonomous logistics, and defense applications are immense, setting the stage for a new wave of use cases previously unimaginable.

This is the first iteration of SEALCOIN’s satellite integration roadmap. Looking ahead, the project will focus on embedding SEALCOIN capabilities directly within satellites, secured at the silicon level using Secure Element technology. This foundational step will enable future “Satellite-as-a-Service” business models, where spaceborne infrastructure autonomously participates in decentralized economies.

“Our goal with SEALCOIN has always been to make transactional IoT borderless, scalable, and secure,” said Carlos Moreira, CEO of WISeKey Group. “With this demo, we’ve not only expanded that vision into space but opened doors to solutions for regions with no cellular or terrestrial coverage”.

SEALCOIN’s architecture is inherently modular, supporting a plug-and-play approach to new types of sensors and satellite operators, further enhancing its potential for global deployment.

This is just the beginning of a bold trajectory toward true device-to-device economies, decentralized, autonomous, and resilient by design.

About WISeKey

WISeKey International Holding Ltd (“WISeKey”, SIX: WIHN; Nasdaq: WKEY) is a global leader in cybersecurity, digital identity, and IoT solutions platform. It operates as a Swiss-based holding company through several operational subsidiaries, each dedicated to specific aspects of its technology portfolio. The subsidiaries include (i) SEALSQ Corp (Nasdaq: LAES), which focuses on semiconductors, PKI, and post-quantum technology products, (ii) WISeKey SA which specializes in RoT and PKI solutions for secure authentication and identification in IoT, Blockchain, and AI, (iii) WISeSat AG which focuses on space technology for secure satellite communication, specifically for IoT applications, (iv) WISe.ART Corp which focuses on trusted blockchain NFTs and operates the WISe.ART marketplace for secure NFT transactions, and (v) SEALCOIN AG which focuses on decentralized physical internet with DePIN technology and house the development of the SEALCOIN platform.

Each subsidiary contributes to WISeKey’s mission of securing the internet while focusing on their respective areas of research and expertise. Their technologies seamlessly integrate into the comprehensive WISeKey platform. WISeKey secures digital identity ecosystems for individuals and objects using Blockchain, AI, and IoT technologies. With over 1.6 billion microchips deployed across various IoT sectors, WISeKey plays a vital role in securing the Internet of Everything. The company’s semiconductors generate valuable Big Data that, when analyzed with AI, enable predictive equipment failure prevention. Trusted by the OISTE/WISeKey cryptographic Root of Trust, WISeKey provides secure authentication and identification for IoT, Blockchain, and AI applications. The WISeKey Root of Trust ensures the integrity of online transactions between objects and people. For more information on WISeKey’s strategic direction and its subsidiary companies, please visit www.wisekey.com.

Disclaimer
This communication expressly or implicitly contains certain forward-looking statements concerning WISeKey International Holding Ltd and its business. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of WISeKey International Holding Ltd to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. WISeKey International Holding Ltd is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise.

This press release does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and it does not constitute an offering prospectus within the meaning of the Swiss Financial Services Act (“FinSA”), the FinSa's predecessor legislation or advertising within the meaning of the FinSA. Investors must rely on their own evaluation of WISeKey and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of WISeKey.

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