Abstract

Using a biometric as an identity has the advantage that identities are unique if the underlying biometric is of a good quality, such as fingerprints, faces, irises. Since biometric measurements are noisy, the existing identity-based encryption systems cannot be used directly to construct IBE scheme. The error-tolerance property of Fuzzy-IBE allows for a private key to decrypt a ciphertext encrypted with a slightly different measurement of the same biometric. Based on this property, a new biometric identity based encryption scheme is proposed. Our scheme is constructed in the standard model and achieves a selective identity security. In addition, the security of our scheme is reduced to decision bilinear Diffie-Hellman(BDH) assumption instead of other strong assumptions.

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