Criminals are now outsmarting AI using fake fingers
Fingerprint scanners have become a common security feature in many devices and systems. From unlocking your smartphone to accessing bank accounts.
Written by Christian King
30 May 2025 | 5 minute read
Fingerprint scanners have become a common security feature in many devices and systems. From unlocking your smartphone to accessing bank accounts and secure buildings, these AI-powered biometric systems promise quick and reliable protection. However, criminals are developing clever ways to outsmart this technology by using fake fingers crafted to deceive fingerprint scanners.
How criminals create fake fingers
Fake fingers are typically made from materials such as silicone, gelatin, glue, or even latex. The process starts by obtaining a mould or an impression of a real fingerprint. Criminals can lift these prints from surfaces like glass, phones, or keyboards using powders or adhesives. Once they have the mould, they create a replica that copies the ridge patterns and skin texture of the original finger.
- These replicas are designed to be flexible and mimic the look and feel of human skin.
- Some advanced fakes even simulate sweat, warmth, and slight moisture to trick scanners that measure these factors.
- The fake finger is placed over the criminal’s own finger or directly onto the scanner, fooling the system into granting access.
The sophistication of these fake fingers is growing. What once required specialised equipment and knowledge can now be achieved with relatively simple materials and techniques. This puts biometric security at risk in many everyday situations.
Why this is a critical security concern
Fingerprint scanners have gained popularity because they are fast and convenient. You simply place your finger on a sensor and gain instant access. But this convenience can come at a cost. When criminals manage to bypass these systems, they threaten personal data, financial security, and even physical safety.
Many fingerprint scanners, especially older or lower-cost models, only analyse the surface patterns of ridges and valleys. They don’t check whether the finger is alive or real beneath the surface. This makes them vulnerable to spoofing attacks with fake fingers.
- Identity theft becomes easier when criminals can impersonate your fingerprint.
- Financial fraud increases as criminals gain access to bank apps and payment systems.
- Physical security systems, like those controlling entry to offices or secure areas, become compromised.
These threats are not hypothetical. There have been numerous documented cases where fake fingers successfully fooled biometric systems. This is why many experts stress that fingerprint scanning should not be the sole security method in use.
How companies and users can improve fingerprint security
Improving biometric security requires action from both technology providers and users. Here are some effective steps that can reduce the risk of fake finger attacks:
- Multi-factor authentication: Combine fingerprint scanning with other forms of verification such as PINs, passwords, facial recognition, or security tokens. This layered approach greatly reduces the chance of unauthorized access.
- Advanced sensors: Use fingerprint scanners equipped with liveness detection. These sensors measure factors like blood flow, pulse, temperature, or electrical conductivity beneath the skin, making it harder to fool the system with fake fingers.
- Regular updates and testing: Biometric systems should be frequently updated and tested against new spoofing techniques. Security teams need to stay ahead of criminals by adopting the latest technologies and threat intelligence.
From a user perspective, it’s important to stay vigilant. Keep your devices and apps updated. Avoid relying solely on fingerprint authentication for sensitive accounts. Use strong, unique passwords alongside biometric systems, and enable two-factor authentication whenever possible.
Common misconceptions about fingerprint security
Many users believe fingerprint scanners are foolproof. This belief can lead to complacency and increased risk. Here are some myths and facts to consider:
- Myth: Fingerprints are impossible to fake.
Fact: As shown, criminals have found effective ways to create fake fingers. - Myth: All fingerprint scanners detect fake fingers.
Fact: Only advanced scanners with liveness detection can do this reliably. - Myth: Fingerprint security alone is enough.
Fact: Combining biometrics with passwords and two-factor authentication provides stronger protection.
Understanding these facts helps you make better security decisions and reduce your vulnerability.
What this means for your everyday security
Fake fingerprint attacks demonstrate that no security method is perfect. They highlight the importance of a layered approach to digital and physical security.
Ask yourself:
- Do I rely solely on fingerprint scans for sensitive accounts?
- Have I enabled two-factor authentication where possible?
- Do I keep my devices and apps updated to patch security weaknesses?
- Am I aware of the latest security features on my devices?
Taking small but consistent steps improves your security posture. For instance, pairing fingerprint authentication with a strong PIN or password adds an essential second layer of defence. Regularly updating software ensures that security patches protect you against emerging threats.
Biometric systems will continue to improve. Researchers are working on new ways to detect fake fingerprints, such as analysing sweat pore patterns, pulse waves, or skin elasticity. But criminals are also innovating. Staying informed and proactive is your best defence.
Looking ahead
AI and biometric technology hold great promise for securing access and personal data. But the arms race between security developers and criminals will continue. Being aware of the risks and taking sensible precautions is vital.
Use biometric security as part of a comprehensive strategy. Combine it with strong passwords, multi-factor authentication, and regular device updates. Educate yourself about emerging threats and best practices.
Your security depends on a mix of technology, behaviour, and vigilance. By staying informed and cautious, you can protect yourself against increasingly sophisticated attacks.
What steps will you take today to protect your digital life?