Identities, forgeries and disguises

The preservation of your identity is a fundamental right. In many situations, you need to claim your identity and this claim needs to be verified somehow. The technology called biometrics may help. But, what if a deliberate impostor claims your identity? Will this forgery be always detected? Biometric identity verification is imperfect. This presentation will review some of the techniques that a deliberate impostor could use to defeat a biometric verification system. It will focuss on audio-visual forgeries using voice conversion and face animation. Such techniques also find useful applications in multimedia. In a second part, we’ll discuss the techniques which could be used if somebody wants to hide his/her identity. Again, voice conversion and face animation is quite efficient to disguise your identity. We’ll review some of the techniques to detect voice disguise which could be used in forensic applications. Finaly, we’ll take a look at ’cancellable biometrics’, a set of techniques to allow users renew their biometric templates and models in case these have been stolen and used by impostors.