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Paper 2006/034
Direct Chosen-Ciphertext Secure Identity-Based Key Encapsulation without Random Oracles
Eike Kiltz and 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.
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. ACISP 2006 and SCN 2006
- Keywords
- identity-based encryptionIBEthreshold cryptography
- Contact author(s)
- kiltz @ cwi nl
- History
- 2006-08-04: last of 4 revisions
- 2006-02-06: received
- See all versions
- Short URL
- https://ia.cr/2006/034
- License
-
CC BY