Hashgraph and Truesense File CITI Patent

The Hashgraph Group, a Web3 and AI engineering company, and Truesense, a developer of ultra-wideband sensing technology, announced the filing of a European patent application for Continuous Identity Trust Infrastructure (CITI). The new system is designed to connect proof of a person’s physical presence with a decentralized digital identity while protecting personal data.

The patent application was submitted to the European Patent Office on April 4, 2026, and covers more than 44 European countries. The companies are also preparing a patent filing in the United States.

CITI combines three technologies: ultra-wideband (UWB) sensing, decentralized identifiers (DIDs), and zero-knowledge proof (ZKP) cryptography. Together, these technologies make it possible to verify that a person was physically present at a specific place and time without revealing personal information or location details.

The system works by first detecting a person’s presence through UWB sensors. This event is then linked to a decentralized identity stored in a digital wallet. A verifiable credential is generated, containing a timestamp and cryptographic proof that is permanently recorded on a distributed ledger. Third parties can later verify the credential without accessing sensitive data.

According to the companies, the technology could be used in sectors where identity verification is important, including finance, healthcare, sports, and entertainment. For example, a person could enter a secured building using a digital identity wallet instead of an access badge. The verification event would be recorded on the Hedera network, creating an auditable record while reducing the risk of credential sharing.

Image: Magnific