Abstract
In EUROCRYPT 2004, Boneh and Boyen presented two efficient Identity Based Encryption (IBE) schemes that are selective-identity secure in the standard model. Particularly, the first one known as BB 1-IBE, which is characterized by commutative blinding technique (BB 1-style), distinguishes itself as the most fertile ground for many applications. They also proved that BB 1-IBE is fully secure in the random oracle model but with a looser reduction. In this paper, we propose a novel IBE scheme of BB 1-style, which is fully secure in the random oracle model with a tighter reduction. Additionally, we give a chosen ciphertext secure construction of our scheme from twin technique.
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Chen, Y., Luo, S., Hu, J., Chen, Z. (2012). A Novel Commutative Blinding Identity Based Encryption Scheme. In: Garcia-Alfaro, J., Lafourcade, P. (eds) Foundations and Practice of Security. FPS 2011. Lecture Notes in Computer Science, vol 6888. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27901-0_7
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DOI: https://doi.org/10.1007/978-3-642-27901-0_7
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