Multi-Bit Allocation Preparing Voice Biometrics for Template - PowerPoint PPT Presentation

Multi-Bit Allocation Preparing Voice Biometrics for Template Protection M. Paulini ⋆ , C. Rathgeb † , A. Nautsch † H. Reichau ⋆ , H. Reininger ⋆ , C. Busch † ⋆ atip – Advanced Technologies for Information Processing GmbH † Hochschule Darmstadt, CRISP, CASED, da/sec Security Research Group Odyssey’16, Bilbao, 22.06.2016 Paulini et al. Multi-Bit Allocation / Odyssey’16, Bilbao, 22.06.2016 1/3

Motivation Biometric Template Protection ◮ Biometric characteristics are NOT secret in an age of increased surveillance ◮ The link between individuals and their biometric (physiological) characteristics is strong and permanent Biometric reference data (templates) MUST be protected in order to safeguard individuals’ privacy and biometric systems’ security! Biometric Template Protection: ◮ Biometric cryptosystems ◮ Cancelable biometrics Properties (ISO/IEC IS 24745): ◮ Irreversibility ◮ Unlinkability Paulini et al. Multi-Bit Allocation / Odyssey’16, Bilbao, 22.06.2016 2/3

Contribution Multi-Bit Allocation Tackled issue: ◮ Biometric cryptosystems operate on a certain form of input, e.g. binary features or point-sets (fuzzy commitment/vault) ◮ Incompatibility issues arise when the type of features does NOT match the acceptable input type! Voice Feature-T ype T emplate Sample Transformation Protection 1000110 Feature Multi-Bit 0110101 PE Extraction Allocation 1011010 Feature-type transformations are required! Proposed system: ◮ Ordered-to-ordered real-to-binary feature-type transformation, Multi-Bit Allocation ◮ Detection of discriminative features, Relevant Projections Paulini et al. Multi-Bit Allocation / Odyssey’16, Bilbao, 22.06.2016 3/3