Vertrouwen aan de lijn (Trust on the line)

The public phone network does not verify who is calling, and criminals exploit that on an industrial scale. This whitepaper shows why, for the financial sector, healthcare and government, telephone fraud is no longer a security incident but a compliance, reputation and continuity issue. And why guaranteed number identity is becoming the new standard. The whitepaper is available in Dutch.

The key points

• The public phone network makes spoofing structurally possible. This cannot be solved within the existing infrastructure.
• Legislation and regulation (Digital Networks Act, NIS2, DORA, GDPR) require organisations to communicate demonstrably securely, including personal liability for board members.
• AI accelerates the threat: deepfakes and automated spoofing put every reactive defence under pressure.
• Trusted Voice provides guaranteed number identity through a closed, authenticated network: demonstrably compliant and without friction for the customer.
• Organisations that act now stay ahead of regulation and build a demonstrable compliance record.

Who it’s for

Board members and compliance officers in the financial sector, healthcare and government. The whitepaper is also useful for risk managers, CISOs and customer contact managers who want to put the topic on their organisation’s agenda.

In this whitepaper

1. Executive summary
2. The problem: telephone fraud as a crisis of trust
3. Why this is urgent now: the regulatory momentum
4. How caller ID spoofing works, and why it is so hard to fight
5. The three sectors hit hardest
6. What a structural solution requires
7. Guaranteed number identity: Trusted Voice
8. Benchmark: reactive versus proactive
9. Value per stakeholder
10. Implementation: easier than expected
11. Compliance by design: DORA and NIS2 article by article
12. Conclusion: from reactive to demonstrably secure
13. About Trusted Voice

Published by Jan Niessen, Trusted Voice B.V., Eindhoven. April 2026.