Author

Christos Sardianos

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#software testing Preprint Oct 2026

SEAL-DT: An End-to-End Security Engineering and Assurance Framework for Cross-Domain Digital Twins

This paper presents SEAL-DT (Security Engineering and Assurance Lifecycle for Digital Twins), a structured approach to building and evaluating secure DTs that brings entity definitions, process models, deterministic simulations, data contracts, evidence records, automated tests and reproducible results into one connect...

Iraklis Varlamis, Stelios Zindros, Christos Sardianos et al. · 0 citations

Preprint Aug 2026

HANSARD: A Reference Architecture for Forensic Readiness, Runtime Witnessing, and Graded Attribution in Autonomous Multi-Agent AI Systems

HANSARD is proposed, a reference architecture treating accountability as a life-cycle property, i.e., spreading an act across redundant agents until none is a but-for cause, making laundering visible.

Christos Sardianos, Iliana Pla, Vasilis Efthymiou et al. · 1 citation