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25/06/2026 10:34 pm
TL;DR: Biometric authentication can improve convenience and add a factor, but the article shows that it becomes risky when used as a weak replacement for revocable credentials or when fallback paths silently preserve password reliance, according to DigiCert. The governing issue is not biometrics themselves, but whether identity controls remain changeable, layered, and resilient when a biometric trait cannot be reset.
NHIMG editorial — based on content published by DigiCert: Biometric Authentication: An Added Layer of Security or Security Risk?
Questions worth separating out
Q: How should organisations use biometrics without weakening authentication?
A: Use biometrics as one factor in a layered authentication design, not as the only gate to sensitive systems.
Q: When do biometrics create more risk than they reduce?
A: They create more risk when the organisation treats them as a replacement for revocable credentials, or when biometric data is stored in a way that expands the attack surface.
Q: What do security teams get wrong about biometric authentication?
A: They often confuse familiarity and convenience with security strength.
Practitioner guidance
- Audit biometric fallback paths Map every biometric login flow and confirm what happens when the biometric check fails.
- Classify biometrics by recoverability Treat biometric factors as high-friction, low-revocability controls and reserve them for use cases where the business accepts that tradeoff.
- Review where biometric data is stored Verify whether templates live on the device, in a trusted enclave, or in a central identity system, and align that storage choice with your threat model.
What's in the full article
DigiCert's full blog post covers the implementation detail this post intentionally leaves for the source:
- Practical examples of when biometric authentication should be paired with other factors rather than used alone
- The article’s discussion of biometric storage and why local device protection changes the security model
- The comparison between passwords, client certificates, and OTP devices when credentials are stolen
- The author’s broader caution about balancing convenience with security decisions in enterprise environments
👉 Read DigiCert’s analysis of biometric authentication as a security control →
Biometric authentication: are your controls actually keeping up?
Explore further
25/06/2026 11:10 pm
Biometrics solve convenience, not identity resilience. The article’s real lesson is that authentication strength is not the same as authentication recovery. A biometric trait may be hard to guess, but it is also hard to revoke, and that makes it a poor stand-alone control for high-consequence access. Practitioners should treat revocability as a core assurance criterion, not an afterthought.
A few things that frame the scale:
- 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, compared to nearly 1 in 4 for securing human identities, according to The State of Non-Human Identity Security.
- Only 1 in 4 organisations are already investing in dedicated NHI security capabilities, with an additional 60% planning to do so within the next twelve months.
A question worth separating out:
Q: Who should own biometric governance in an IAM programme?
A: IAM, security architecture, and privacy stakeholders should own it together because biometrics affect assurance, data handling, and user recovery. The programme should define where biometrics are acceptable, what fallback methods exist, and how failures are reviewed before deployment expands.
👉 Read our full editorial: Biometric authentication adds convenience, but not identity resilience
