803 citations · 2.6k across the 256 of their papers we have counts for
6 papers · 2 filters
SEDULity: A Proof-of-Learning Framework for Distributed and Secure Blockchains with Efficient Useful Work
Weihang Cao, Mustafa Doger, Sennur Ulukus
The security and decentralization of Proof-of-Work (PoW) have been well-tested in existing blockchain systems. However, its tremendous energy waste has raised concerns about sustai…
HetDAPAC: Leveraging Attribute Heterogeneity in Distributed Attribute-Based Private Access Control
Shreya Meel, Sennur Ulukus
Verifying user attributes to provide fine-grained access control to databases is fundamental to attribute-based authentication. Either a single (central) authority verifies all the…
Incentive Attacks in BTC: Short-Term Revenue Changes and Long-Term Efficiencies
Mustafa Doger, Sennur Ulukus
Bitcoin's (BTC) Difficulty Adjustment Algorithm (DAA) has been a source of vulnerability for incentive attacks such as selfish mining, block withholding and coin hopping strategies…
The Hidden Cost of Correlation: Rethinking Privacy Leakage in Local Differential Privacy
Sandaru Jayawardana, Sennur Ulukus, Ming Ding +1
Local differential privacy (LDP) has emerged as a promising paradigm for privacy-preserving data collection in distributed systems, where users contribute multi-dimensional records…
An Incentive-Compatible Semi-Parallel Proof-of-Work Protocol
Mustafa Doger, Sennur Ulukus
Parallel Proof-of-Work (PoW) protocols have been suggested in the literature to improve the safety guarantees, transaction throughput and confirmation latencies of Nakamoto consens…
When Should Selfish Miners Double-Spend?
Mustafa Doger, Sennur Ulukus
Conventional double-spending attack models ignore the revenue losses stemming from the orphan blocks. On the other hand, selfish mining literature usually ignores the chance of the…