---
title: OTAC Auth V2 Now on PLCnext - Your Ultimate PLC Security Upgrade
description: OTAC Auth V2 Now on PLCnext - Your Ultimate PLC Security Upgrade
image: https://blog.ssenstone.com/hubfs/plcnext_v2.jpg
---
Jul 30, 2024 2:39:30 PM
# OTAC Auth V2 Now on PLCnext - Your Ultimate PLC Security Upgrade
 [ SSenStone ](https://blog.ssenstone.com/en/newsinformation/author/ssenstone)
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We are thrilled to announce that SSenStone's latest OTAC auth v2 application is now available on the PLCnext platform by Phoenix Contact. This exciting collaboration brings SSenStone's groundbreaking One Time Authentication Code (OTAC) technology to PLCnext controllers, providing unparalleled multi-factor authentication (MFA) via users' smartphones.
So, what's new in Version 2?
##### **Protect Multiple PLCs with Ease**
With the new v2 release, you can now protect multiple PLCs using OTAC auth MFA. The application has been redesigned into two parts: the OTAC auth MFA Server and the Client. This new server-client architecture offers a scalable and flexible security solution for your entire network.
- **OTAC auth MFA Server: **Install this on a central edge PLC to serve as a secure authentication hub.
- **OTAC auth MFA Client:** Install this on each PLC you wish to protect, enabling robust MFA for all your devices.
##### **Key Features of OTAC Auth V2**
Our latest version comes packed with features designed to enhance your security infrastructure while simplifying management and deployment.
1. **Multi-PLC Protection:** Safeguard multiple PLCs simultaneously, enhancing security across your network.
2. **Server-Client Architecture:** Centralized management with distributed protection.
3. **Ease of Installation:** A simplified setup process minimizes downtime and operational disruption.
4. **Advanced MFA:** Utilizing OTAC technology to offer superior security over traditional methods.
##### **Why You Should Be Excited**
The benefits of OTAC Auth V2 go beyond just security. Here's why this update is a game-changer for your operations:
- **Enhanced Security:** Significantly improve authentication security on your PLC devices with MFA capabilities.
- **No Network Dependency:** OTAC works without requiring network access.
- **Standalone & Networked PLCs:** Suitable for both air-gapped and networked PLCs.
- **User-Friendly:** Seamless integration with a single-step login and MFA combined for fast, secure access.
- **Multi-User Support:** Works for multiple users on multiple PLC devices.
- **Simple Deployment:** Installs directly onto the PLC without additional hardware.
- **Cost-Effective:** More affordable compared to other MFA solutions utilizing PKI.
- **Reduced Overheads:** Eliminate password-related issues and reduce operational burdens for your OT security teams.
- **Dynamic Security:** Ensure secure and dynamic logins every time without needing to update passwords.
##### ****Getting Started with OTAC auth V2****
To help you get started with OTAC auth V2, we have created four detailed tutorial videos that guide you through the entire process. These videos cover everything from installation to user onboarding. Check them out below:
- [Installing OTAC auth MFA Server](https://youtu.be/SYqmM4Go_J4?si=iaLRb1syqeK5ExAj)
Watch this video to learn how to install the OTAC auth MFA Server on a central edge PLC.
- [Installing OTAC auth MFA Client](https://youtu.be/hx-92e0hVCw?si=vZQga2QDbJx2IY8j)
This tutorial walks you through the steps to install the OTAC auth MFA Client on your PLCs.
- [Applying Licenses on OTAC auth MFA Server & Client](https://youtu.be/1wcchelJcgw?si=6tdgc_jNsV1xwsNP)
Learn how to apply licenses on both the OTAC auth MFA Server and Client.
- [Mobile App and User Onboarding Setup](https://youtu.be/QBRG1nXHdj0?si=IZviP5GTpOh_J0iq)
This video covers the setup of the mobile app and onboarding new users to ensure a smooth and secure experience.
Stay ahead in securing your PLC devices with SSenStone's OTAC auth v2, now on the PLCnext platform by Phoenix Contact. We are excited to continue our journey in providing innovative security solutions for your operational technology needs.
Stay tuned for more updates, and thank you for your continued support!
[OTAC](https://blog.ssenstone.com/en/newsinformation/tag/otac), [PLC](https://blog.ssenstone.com/en/newsinformation/tag/plc)
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## [SSenStone Partners with Phoenix Contact to Unveil Modular User Authentication on PLCnext Store](https://blog.ssenstone.com/en/newsinformation/38)
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## [SSenStone Takes the Lead in Enhancing User Authentication for PLCs in OT Field through Collaboration with LS ELECTRIC](https://blog.ssenstone.com/en/newsinformation/37)
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## [SSenStone cooperates with LS Electric for localization of PLC with next-generation authentication technology](https://blog.ssenstone.com/en/newsinformation/34)
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