swIDch PLC-OTAC - 2026 Pricing, Features, Reviews & Alternatives

swIDch PLC-OTAC offers an optimized and secure authentication solution specifically designed for Programmable Logic Controller (PLC) devices in industrial control systems (ICS) and operational technology (OT) environments. Utilizing the one-way dynamic authentication OTAC technology, the solution ensures high security with minimal resource requirements. Unlike traditional password-based authentication, PLC-OTAC offers a passwordless multi-factor authentication (MFA) approach that significantly increases security while minimizing disruption and computing demands.

The PLC-OTAC solution neutralizes common vulnerabilities associated with password-based systems, such as default passwords, password sharing, and the inherent weaknesses of static credentials. It employs dynamic one-time authentication codes (OTAC) that are unique for each user and constantly changing, defeating packet sniffing attacks and unauthorized access attempts. The OTAC-based authentication process streamlines the login experience by eliminating the need for usernames or passwords, providing a single-step identification and authentication workflow.

PLC-OTAC offers deployment options to accommodate the specific requirements of each end-user environment. It can be integrated directly onto the PLC in standalone mode, deployed on a central server within the OT network, or implemented in a hybrid configuration combining both approaches. The solution's customizable design supports various authentication code lengths and issuance mediums, such as smartphones or display cards, ensuring integration with existing PLC authentication user interfaces.