Fingerprints, face scans, and iris scans are becoming increasingly common for unlocking phones, logging into bank accounts, and accessing secure buildings.
Many people see biometrics as safer and more convenient than passwords because they do not need to remember anything.
However, biometrics have one major weakness: they cannot easily be changed.
If a hacker steals your password, you can simply create a new one.
But if someone steals a copy of your fingerprint or iris data, you cannot replace your fingers or eyes. Once biometric information is compromised, the risks can last for a lifetime.
Now, researchers have developed a new method that could make biometric systems much safer.
Their work, published in the International Journal of Computational Vision and Robotics, offers a way to create what are known as “revocable” or “cancellable” biometrics.
In simple terms, it may allow biometric IDs to be reset in a way that is similar to changing a password.
The idea is to avoid storing a person’s original fingerprint or other biometric information directly. Instead, the system transforms the data into a protected version from the beginning.
This transformed version can still verify a person’s identity, but it hides the original information.
If the protected data is ever stolen, it can be canceled and replaced with a newly transformed version. This means the user would not be permanently exposed, even if hackers gained access to the stored information.
To build this system, the researchers combined several advanced computer techniques. First, the system identifies unique features in a fingerprint image, such as distinctive patterns and points.
It then uses mathematical methods to convert these features into a different form that is difficult to reverse engineer.
The information is further scrambled and compressed into a secure digital representation. Additional mathematical operations make it even harder for attackers to reconstruct the original fingerprint.
The research team tested the system using standard fingerprint databases. The results showed that the method performed similarly to existing biometric systems in recognizing users but provided stronger protection against certain types of cyberattacks.
One attack the researchers specifically examined is known as a record multiplicity attack. In this type of attack, hackers collect multiple stolen versions of a person’s biometric templates and try to piece them together to recover the original fingerprint. The new method proved more resistant to this kind of attack than some current approaches.
As biometric authentication becomes increasingly common in daily life, protecting personal data is becoming more important than ever. Technologies that allow biometric information to be replaced rather than permanently compromised could help solve one of the biggest security problems facing modern digital identity systems.
In the future, losing control of your fingerprint data may no longer be a lifelong problem. Instead, your biometric ID could become something you can reset and replace, much like changing a password today.
