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Title:
Direct Chosen-Ciphertext Secure Identity-Based Key Encapsulation without Random Oracles
Authors: Eike Kiltz, David Galindo
Abstract:We describe a new and practical identity-based key encapsulation mechanism that is secure in the standard model against chosen-ciphertext (CCA2) attacks. Since our construction is direct and not based on hierarchical identity-based encryption, it is more efficient than all previously proposed schemes.
Furthermore, we give the first chosen-ciphertext secure identity-based key encapsulation mechanism with threshold key delegation and decryption in the standard model.
ePrint: https://eprint.iacr.org/2006/034
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