Abstract. We propose a new hybrid protocol for cryptographically secure biometric authentication. The main advantages of the proposed protocol over previous solutions can be summarised as follows: (1) potential for much better accuracy using different types of biometric signals, including behavioural ones; and (2) improved user privacy, since user identities are not transmitted at any point in the protocol execution. The new protocol takes advantage of state-of-the-art identification classifiers, which provide not only better accuracy, but also the possibility to perform authentication without knowing who the user claims to be. Cryptographic security is based on the Paillier public key encryption scheme.

Abstract. We present a formal executable specification of two crucial JavaCard platform components, namely the Java Card Virtual Machine (JCVM) and the ByteCode Verifier (BCV). Moreover, we relate both components by giving a proof of correctness of the ByteCode Verifier. Both formalisations and proofs have been machined-checked using the proof assistant Coq.

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