Abstract
We propose a new biometric identity based encryption scheme (Bio-IBE), in which user biometric information is used to generate the public key with a fuzzy extractor. This is the first Bio-IBE scheme that achieves constant size ciphertext. This is also a scheme that is secure against the adaptive chosen ciphertext attack (CCA2). Details are presented along with a discussion of Shamir’s threshold secret sharing and fuzzy extraction of biometrics, which is based on error correction codes. We also define a security model and prove that the security of the proposed scheme is reduced to the decisional bilinear Diffie-Hellman (DBDH) assumption. The comparison shows that the proposed scheme has better efficiency and stronger security compared with the available Bio-IBE schemes.
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Project supported by the National Basic Research Program (973) of China (No. 2007CB311201) and the National Natural Science Foundation of China (Nos. 60970119, 60803149, 60833008, and 61072067)
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Yang, Y., Hu, Yp., Zhang, Ly. et al. CCA2 secure biometric identity based encryption with constant-size ciphertext. J. Zhejiang Univ. - Sci. C 12, 819–827 (2011). https://doi.org/10.1631/jzus.C1000429
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DOI: https://doi.org/10.1631/jzus.C1000429