Attribute-based signing right delegation

• Main Authors: LIU, Weiwei, MU, Yi, YANG, Guomin
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2014
• Subjects: Attribute-based signature; Proxy signature; Threshold predicate; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/7374; https://ink.library.smu.edu.sg/context/sis_research/article/8377/viewcontent/Attribute_based_signing_right_delegation.pdf
• Institution: Singapore Management University

Attribute-based signature and proxy signature are both very useful in many real-world applications. In this paper, we combine the special features of both signatures and propose an attribute-based proxy signature scheme, where the original signer, who possesses a set of attributes, can delegate his/her signing right to a designated proxy signer. By verifying the signature, a verifier can be convinced that the signature is generated by the proxy signer who has obtained the delegation from a legitimate signer whose attributes satisfy a predicate. However, the verifier cannot tell from the signature who is the original signer. We provide the formal definition and adversarial models for attribute-based proxy signature, and an efficient scheme that supports threshold predicates.