In this talk, I gave a presentation for our ACSAC22 paper “If You Can’t Beat Them, Pay Them: Bitcoin Protection Racket is Profitable”. We describe an attack called Fork Withholding Attack under a Protection Racket (FWAP), in which the mining pool pays the attacker for withholding a fork. [Slides] [ACSAC22 full program page]
In this paper, we propose a lightweight auto-refreshing pseudonym protocol (LARP) for V2X. LARP supports efficient operations for resource-constrained devices, and provides security even when parts of the vehicle are compromised.
Talk, London School of Testing, Hongkong, China
To detect the identity fraud attacks caused by an authentication server compromise, we propose two mutual authentication protocols by using a pseudo-random function family and a one-time signature (OTS) scheme. [CPSS21 full program]