Abstract
Complete robustness (CROB) was proposed to guarantee that for a public key encryption scheme, decryption attempts will fail with high probability if the wrong decryption key is used to decrypt a ciphertext, even if the keys are maliciously generated by the adversary. In this paper, we extend the notion of complete robustness to the identity-based setting. We firstly formalize the CROB for identity-based encryption, and present a generic construction achieving CROB from an arbitrary identity-based encryption scheme. After that, we investigate whether there exist some kind of relations between CROB and related-key attack (RKA) security for the case of identity-based encryption. We conclude that these two notions (CROB and RKA security) are separable for identity-based encryption, but with a slight modification to our generic construction, an identity-based encryption scheme offering complete robustness with security against related-key attacks can be constructed from any identity-based encryption scheme.
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Cui, H., Mu, Y., Au, M.H. (2014). Complete Robustness in Identity-Based Encryption. In: Chow, S.S.M., Liu, J.K., Hui, L.C.K., Yiu, S.M. (eds) Provable Security. ProvSec 2014. Lecture Notes in Computer Science, vol 8782. Springer, Cham. https://doi.org/10.1007/978-3-319-12475-9_26
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DOI: https://doi.org/10.1007/978-3-319-12475-9_26
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