Welcome to the resource topic for 2008/478
Title:
Attribute-Based Encryption with Key Cloning Protection
Authors: M. J. Hinek, S. Jiang, R. Safavi-Naini, S. F. Shahandashti
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.
ePrint: https://eprint.iacr.org/2008/478
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