Direct Chosen-Ciphertext Secure Identity-Based Key Encapsulation without Random Oracles

Eike Kiltz; David Galindo

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): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. ACISP 2006 and SCN 2006
Keywords: identity-based encryption IBE threshold 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

BibTeX

@misc{cryptoeprint:2006/034,
      author = {Eike Kiltz and David Galindo},
      title = {Direct Chosen-Ciphertext Secure Identity-Based Key Encapsulation without Random Oracles},
      howpublished = {Cryptology {ePrint} Archive, Paper 2006/034},
      year = {2006},
      url = {https://eprint.iacr.org/2006/034}
}