International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Attribute-Based Encryption with Key Cloning Protection

Authors:
M. J. Hinek
S. Jiang
R. Safavi-Naini
S. F. Shahandashti
Download:
URL: http://eprint.iacr.org/2008/478
Search ePrint
Search Google
Abstract: In this work, we consider the problem of key cloning in attribute-based encryption schemes. We introduce a new type of attribute-based encryption scheme, called token-based attribute-based encryption, that provides strong deterrence for key cloning, in the sense that delegation of keys reveals some personal information about the user. We formalize the security requirements for such a scheme in terms of indistinguishability of the ciphertexts and two new security requirements which we call uncloneability and privacy-preserving. We construct a privacy-preserving uncloneable token-based attribute-based encryption scheme based on Cheung and Newport's ciphertext-policy attribute-based encryption scheme and prove the scheme satisfies the above three security requirements. We discuss our results and show directions for future research.
BibTeX
@misc{eprint-2008-18054,
  title={Attribute-Based Encryption with Key Cloning Protection},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / Attribute-Based Encryption (ABE), Access Control, Key Delegation, User Revocation},
  url={http://eprint.iacr.org/2008/478},
  note={ mjhinek@alumni.uwaterloo.ca 14196 received 12 Nov 2008},
  author={M. J. Hinek and S. Jiang and R. Safavi-Naini and S. F. Shahandashti},
  year=2008
}