As cyber attacks targeting OT environments continue to rise, securing Industrial Control Systems (ICS)—including PLC, HMI, DCS, RTU, and SCADA—has become a critical priority. International standards such as IEC 62443 and NIS2 now explicitly require authentication-based access control and auditability tailored to OT environments.
To address these challenges, SSenStone delivers three OT Authentication Solutions powered by its proprietary one-way dynamic authentication technology, OTAC.
OTAC generates one-time, dynamic authentication codes that are impossible to steal, reuse, or predict. Unauthorized commands are blocked before reaching OT devices such as PLCs, HMIs, and RTUs, and the technology operates reliably even in closed, low-bandwidth OT environments—all without replacing existing legacy equipment.
✔️ OTAC Trusted Access Gateway (TAG)
A gatekeeper at the OT network edge that verifies every access attempt—enabling access control and audit logging without modifying legacy devices.
✔️ Endpoint OTAC
Authentication embedded directly into PLC, HMI, RTU, DCS, and SCADA devices—untrusted users and commands are blocked immediately at the device level.
✔️ OTAC Auth MFA
An OT-optimized MFA solution that prevents access even with stolen credentials—delivering strong yet field-friendly user authentication.
Transform your OT security with SSenStone—simpler, safer, and built for a resilient, future-ready industrial environment.