Robust OT Authentication for Industrial Environments
SSenStone secures every access point—from PLCs, SCADAs and HMIs to control systems—delivering trusted OT authentication compliant with global standards such as IEC 62443, CRA, and NIS2.
Why Operational Technology Requires a Unique Security Approach
▪️Direct Control over Physical Operations
Unlike IT, OT directly controls plant machinery, where continuous uptime is essential.
▪️Severe Impact of Unplanned Downtime
Outages cause real-world damage and critical safety risks, far beyond basic IT glitches.
▪️High-Risk Access Environments
Shared logins and remote maintenance create critical gaps, requiring robust authentication.
Authorised Access is the Starting Point of OT Cyber Attacks

Static Passwords & Shared Accounts
OT endpoints like PLCs, HMIs, and SCADA still rely on static, unchanged passwords, leaving them highly vulnerable to credential theft.

Unsecured Remote & Third-Party Access
Maintenance connections by external engineers and vendors often originate outside the security perimeter, creating dangerous attack paths.

Lack of Granular Identity & Access Controls
Perimeter network security alone cannot precisely verify, monitor, or restrict exactly who is accessing which specific critical device on the plant floor.

How Can You Protect OT Endpoints Right from the Access Stage?
🔹 Optimised for Air-Gapped Environments
Overcomes technical constraints in OT environments, such as unidirectional communication, delivering security that is immediately deployable on the plant floor.
🔹 Dynamic One-Time Authentication
Replaces high-risk static passwords with dynamic OTAC (One-Time Authentication Code) that changes with every use, preventing credential reuse and theft.
🔹 Security that Ensures Operational Continuity
Seamlessly integrates into existing OT workflows without altering legacy infrastructure or system configurations, delivering user-friendly security.
Tailored OT Authentication Security for Sector-Specific Needs
Energy
Prioritises maximum grid stability for power plants and critical infrastructure. Where minor access errors can trigger national emergencies, SSenStone delivers uninterrupted OT authentication to guarantee high operational availability.
Water
Provides secure access control for public utility networks. Considering geographically dispersed facilities, it strictly verifies third-party vendors and field engineers to prevent unauthorised access and operational mishaps.
Manufacturing
Ensures zero-downtime operation across smart factories and automated production lines. Non-intrusive authentication blocks unauthorised access to PLCs and key assets without interrupting existing workflow logic.
Transport
Delivers real-time access security for rail and traffic control systems. Zero-latency dynamic authentication safeguards transit infrastructure and passenger safety where precise access rights and high availability are essential.
Chemicals
Prevents industrial accidents and protects high-risk processing plants. Because minor control errors can cause major safety hazards, precise authentication blocks unauthorised access to maximize system stability.
Food & Beverage
Protects continuous production processes and strict hygiene standards. Simple yet robust authentication maintains operational continuity during frequent shift changes without interrupting daily workflow efficiency.
OTAC Algorithm Analysis and Academic Verification

New Excellent Technology (NET) Certification Acquired

SSenStone has received the NET Certification from the Ministry of Trade, Industry, and Energy for its "Individual IoT Device Authentication and Transmission Data Security Technology through Unidirectional Dynamic Authentication (OTAC)."
International Common Criteria (CC) Certification Achieved
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OTACTokenV1.0, the authentication solution based on the world’s first unidirectional dynamic authentication technology, OTAC, has earned the international Common Criteria (CC) certification. For more information, please refer to the press release.
OTAC for Phygital Wins IR52 Jang Yeong-sil Award

SSenStone's OTAC for Phygital has been awarded the 40th-week IR52 Jang Yeong-sil Award for 2024, hosted by the Ministry of Science and ICT. For more details, please visit the official IR52 Jang Yeong-sil Award homepage or the press release.