Untraceability of Group Signature Schemes based on Bilinear Mapping and Their Improvement

Abstract

The traceability is one of the core requirements for group signature schemes.Recently, group signature schemes based on the bilinear mapping were proposed. The bilinearity of a bilinear mapping allows an efficient signature scheme verification for signature schemes based on the Discrete Logarithm type problem. But the bilinearity of a bilinear mapping can be an attack point with respect to the traceability for group signature schemes when it is designed in such a way that the linearity can be preserved. We show that Cheng-Zhu-Qiu-Wang's group signature schemes [8] based on bilinear mapping have no traceability property due to their improper use of a bilinear mapping in their signature generation and verification step. We also propose security enhanced group signature schemes for both of mini group signature scheme and improved group signature scheme of Cheng-Zhu-Qiu-Wang's.

Electrical Load Forecasting Using Edge Computing and Federated Learning

“…However this method makes it hard to treat each client individually because of the anonymity. Other works' focus is masking the consumption data, where data aggregation is the most popular method [20,21], but it goes in opposite directions with STLF requirements.…”

Towards Secure Virtual Machine Migration in Vehicular Cloud Environment

“…In this section, we present our approach to secure virtual machine migration in vehicular cloud. When we describe our approach, we make the following assumptions and consider ID-based encryption with pseudonym [6] and group signature scheme [2] to cope with the aforementioned security requirements.…”