Secomea presents an OT remote-access platform for manufacturers and machine vendors with user-access management, activity tracking, local control, and remote-session controls. Standing vendor access remains defensible only when each site, asset group, sponsor, contract, purpose, privilege, and expiry can be recertified or removed independently.
Dispel documents zero-trust remote access, vendor session control, identity controls, isolation, and audit records for industrial environments. Those controls can govern how a person reaches an OT asset, but they do not approve the maintenance task, establish a safe plant state, or transfer engineering and operating authority.
NIST SP 1800-45 documents three secure remote-access reference designs demonstrated with commercial technologies in a lab. The guide can sharpen architecture and acceptance questions, but it does not authorize a connection to a live water or wastewater control environment.