TREES: Traceable, Revocation-Efficient, and Exculpable Signatures for Vehicular Ad-Hoc Networks
نویسندگان
چکیده
Vehicular Ad-Hoc Networks (VANETs) require advanced cryptographic techniques in order to meet the conflicting requirements of simultaneous user anonymity and accountability. In this paper, we present a novel group signature scheme that meets these requirements. It provides constant-time revocation, much more efficient than what is achieved in existing schemes. It also provides exculpability so that the authority is not able to forge signatures on behalf of the users. In addition, it provides an efficient distributed tracing mechanism that does not violate the privacy of innocent users. While designed for VANETs, our signature scheme is suitable for any ad-hoc network with similar requirements.
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