TY - RPRT TI - Secure Time Synchronization in Power Grids and Network HIL Synchrophasor Testing AU - Wu, Ori [ORNL] (ORCID:0000000326723410) AU - Olama, Mohammed [ORNL] (ORCID:0000000238902064) AU - Cooper, Chris [ORNL] AU - Osman, Amir [ORNL] (ORCID:0009000661914799) AU - Christopher, Carter [ORNL] (ORCID:0000000223190084) PY - 2026 DO - 10.1109/sgsma65955.2026.11618807 UR - https://www.osti.gov/biblio/3413754 ID - 3413754 ER -