8 papers
All-out Attack: Optimal Block Withholding Under Pay-Per-Share Scheme
Mustafa Doger, Sennur Ulukus
Classical Block Withholding (BWH) attacks have been extensively studied in block-dependent reward schemes, where pool members are compensated upon a block discovery within the pool…
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…
Temporary Power Adjusting Withholding Attack
Mustafa Doger, Sennur Ulukus
We consider the block withholding attacks on pools, more specifically the state-of-the-art Power Adjusting Withholding (PAW) attack. We propose a generalization called Temporary PA…
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…
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…
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…