4 papers
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…
MAGIQ: A Post-Quantum Multi-Agentic AI Governance System with Provable Security
Sepideh Avizheh, Tushin Mallick, Alina Oprea +2
Our computing ecosystem is being transformed by two emerging paradigms: the increased deployment of agentic AI systems and advancements in quantum computing. With respect to agenti…
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…
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…