Linxens unveils Hint to detect chip-tampered ID documents

Linxens has launched a new security feature for electronic identity documents that flags attempts to damage embedded chips, targeting a growing method of document fraud at borders.

The product, branded Hint, sits inside the inlay layer of an identity document and monitors for magnetic, electrical or physical interference directed at the chip. It targets a practice that document experts describe as a major vulnerability in current passport and ID card designs.

Global organisations and forensic document laboratories have reported a rise in identity fraud based on national documents such as passports, identity cards and driving licences. Criminals often alter or replace biographical data or photos, and increasingly seek to neutralise or bypass the chip that contains secure digital information.

Governments and industry have responded by adding more complex physical protections to documents. These include advanced substrates such as polycarbonate, as well as security printing, windows and hinge features. The physical layers of many documents now resist common forgery techniques.

By contrast, the chip itself has remained more exposed to targeted attacks. Linxens said analysis of forged documents in countries that systematically inspect seized IDs shows that almost all fraudulent or counterfeit documents exhibit deliberate chip damage.

The company said this pattern reflects more sophisticated criminal methods. Attackers aim to disable the chip so that border control systems fall back on less robust visual or machine-readable checks.

Chip-tampering focus

Hint is designed specifically for this type of attack. Linxens embeds the feature inside the document's inlay. The inlay sits between the secure outer layers and the chip module.

The feature detects attempts to disable or alter the chip using magnetic fields, electrical interference or physical force. It then provides a signal at document inspection.

Border officers and police can use this signal to identify tampering attempts at an earlier stage in checks and with less reliance on specialist forensic analysis. Agencies can apply the feature in automated border gates, manual inspection lanes and at administrative counters where authorities issue or verify ID documents.

The company presented the feature at the Trustech 2025 trade show in Paris. It said the design fits into existing production flows for chip-enabled identity documents.

Hint can be specified for a range of secure documents. It is compatible with electronic passports, national eID cards, residence permits and driving licences.

"Chip-tampering is one of the biggest blind spots in identity security today. Almost every forged document we see in case studies shows deliberate damage to the chip, yet no existing feature was designed to reveal it," said Jérôme Frou, Vice President of Linxens Government, Linxens.

"Hint brings a level of protection the industry was missing. It gives border officers a clear, immediate signal when a document has been manipulated," said Frou.

Border fraud pressure

Identity fraud affects migration controls, aviation security and domestic administration. False or altered documents support activities such as people smuggling, benefit fraud and organised crime.

Many border management agencies now rely more heavily on electronic document readers and biometric checks. The chip in an ePassport or eID stores biometric data and cryptographic elements that link the holder to the document.

When criminals destroy or disable the chip, inspection systems often revert to optical checks of the printed data page and machine-readable zone. These checks are generally easier to compromise, especially if the document's physical security is older or worn.

Industry specialists see chip integrity as a growing focus within document security. New features now increasingly address the interaction between the chip, its antenna, the inlay and the outer structure of the document.

Linxens expansion

Linxens supplies components and materials for identity documents and smart cards. It said it has delivered more than 122 billion micro-connectors and 6 billion RFID antennas worldwide.

The business works with government programmes in over 100 countries. These programmes include national identity schemes, travel documents and other secure credentials.

The company's portfolio covers physical and digital security products such as RFID inlays, secure data pages, polycarbonate windows, hinge features and high-security materials. These materials support document durability, traceability and resistance to fraud techniques.

Linxens develops its technologies in seven research and development centres. It manufactures in eight production sites in Europe and Asia. The network includes facilities in Thailand, Germany and Singapore that meet security and quality certifications including EAL6, ISO 9001 and ISO 14001.

The group also supplies components for sectors such as telecommunications, transportation, financial services, hospitality, access control and connected healthcare. It develops modules and systems for internet-of-things applications.

Under its government-focused brand, Linxens designs physical and digital security features for identity documents and related systems. The company employs about 3,000 people globally across its production and R&D sites.

Linxens said work will continue on further security features that address evolving attack methods against chips and physical document structures.