5 papers
(Im)possibility of Incentive Design for Challenge-based Blockchain Protocols
Suhyeon Lee, Dieu-Huyen Nguyen, Donghwan Lee
Blockchains offer a decentralized and secure execution environment strong enough to host cryptocurrencies, but the state-replication model makes on-chain computation expensive. To…
Inside Qubic's Selfish Mining Campaign on Monero: Evidence, Tactics, and Limits
Suhyeon Lee, Hyeongyeong Kim
In 2025, the blockchain network Qubic conducted a mining campaign on Monero, a privacy-focused cryptocurrency. It publicly presented the campaign as a ``51\% takeover'' and a demon…
Looking for Attention: Randomized Attention Test Design for Validator Monitoring in Optimistic Rollups
Suhyeon Lee, Yeongju Bak
Optimistic Rollups (ORUs) significantly enhance blockchain scalability but inherently suffer from the verifier's dilemma, particularly concerning validator attentiveness. Current s…
Hollow Victory: How Malicious Proposers Exploit Validator Incentives in Optimistic Rollup Dispute Games
Suhyeon Lee
Blockchain systems, such as Ethereum, are increasingly adopting layer-2 scaling solutions to improve transaction throughput and reduce fees. One popular layer-2 approach is the Opt…
180 Days After EIP-4844: Will Blob Sharing Solve Dilemma for Small Rollups?
Suhyeon Lee
The introduction of blobs through EIP-4844 has significantly reduced the Data Availability (DA) costs for rollups on Ethereum. However, due to the fixed size of blobs at 128 KB, ro…