3 papers
cs.CR2026
Sponsored Group Signature and its Application to Privacy-preserving Guest Access in Smart Environments
Sepideh Avizheh, Reihaneh Safavi-Naini, Shiwei Sun
Group signatures are privacy preserving signature schemes in which a group member can anonymously sign messages on behalf of the group, while providing accountability, by allowing…
cs.CR2019
Secure Logging with Security against Adaptive Crash Attack
Sepideh Avizheh, Reihaneh Safavi-Naini, Shuai Li
Logging systems are an essential component of security systems and their security has been widely studied. Recently (2017) it was shown that existing secure logging protocols are v…
cs.CR2018
A New Look at the Refund Mechanism in the Bitcoin Payment Protocol
Sepideh Avizheh, Reihaneh Safavi-Naini, Siamak F. Shahandashti
BIP70 is the Bitcoin payment protocol for communication between a merchant and a pseudonymous customer. McCorry et al. (FC~2016) showed that BIP70 is prone to refund attacks and pr…