Human Challenge Oracle: Designing AI-Resistant, Identity-Bound, Time-Limited Tasks for Sybil-Resistant Consensus. - Homayoun Maleki; Nekane Sainz; Jon Legarda (CoRR, 2026)

Proof of Commitment: A Human-Centric Resource for Permissionless Consensus. - Homayoun Maleki; Nekane Sainz; Jon Legarda (CoRR, 2026)

Scarcity Is Not Enough: An Impossibility Result for Linear Sybil Cost Under Parallelizable Resources. - Homayoun Maleki; Nekane Sainz; Jon Legarda; Igor Santos-Grueiro (CoRR, 2026)