Structural Identity-Based Encryption

Man Ho Au; Siu-Ming Yiu

Paper 2007/422

Structural Identity-Based Encryption

Man Ho Au and Siu-Ming Yiu

Abstract

In this paper, we introduce the concept of structural identity-based encryption (SIBE). Similar to hierarchical identity-based encryption (HIBE), entities in the system are organized into hierarchy. An entity in SIBE can decrypt ciphertext for all its ancestors. It can be seen as an opposite of HIBE, where an entity can decrypt the ciphertext for all its descendants. We formalize the notion and security requirements, propose an efficient construction and show that our construction is secure under appropriate assumptions in the random oracle model.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: HIBE SIBE
Contact author(s): mhaa456 @ uow edu au
History: 2007-11-18: received
Short URL: https://ia.cr/2007/422
License: CC BY

BibTeX

@misc{cryptoeprint:2007/422,
      author = {Man Ho Au and Siu-Ming Yiu},
      title = {Structural Identity-Based Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2007/422},
      year = {2007},
      url = {https://eprint.iacr.org/2007/422}
}