Based on the world’s first one-way dynamic authentication technology, a dynamic, randomised, one-time authentication code (OTAC) provides more secure authentication through a unidirectional dynamic token. Generated on demand locally by the user without needing any network, OTAC enables identification and authentication simultaneously in a single step. This innovation overcomes bidirectional limitations, including high dependency on the push-and-pull system of network connectivity between clients and servers.By reinventing authentication, a new standard is set in cybersecurity, moving beyond the constraints of existing authentication methods.

OTAC Solutions

 

 

What Makes OTAC Unique 

Unlike traditional authentication methods such as ID/password, OTP, SMS, ARS, tokens, and FIDO, OTAC redefines security by eliminating static credentials and network dependencies. While conventional systems rely on stored credentials, repeated authentication requests, or external hardware, OTAC generates a dynamic, one-time authentication code locally—without requiring a network connection.

This means no risk of credential reuse, interception, or phishing. Unlike OTPs and SMS-based methods, which are vulnerable to interception and delays, OTAC ensures seamless, real-time authentication. Unlike FIDO and token-based solutions, which depend on external devices, OTAC is lightweight and scalable, requiring no additional hardware. By enabling both identification and authentication in a single step, OTAC delivers unmatched security, efficiency, and user convenience across industries.

 

[JPG] OTAC technology table v2

What we offer

swIDch’s OTAC technology combines advantages of the three most common authentication systems – user ID/passwords, RSA hardware/software for generating authentication codes, and tokenisation. This method generates a single dynamic code that both identifies and authenticates the user at the same time and can do so without a network connection. Our one time method cannot be used by anyone else.

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Strong & Secure Authentication

OTAC generates dynamic authentication codes—no network required.

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Simple & Seamless Integration

API/SDK support ensures easy and frictionless IT admin deployment.

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Flexible & Highly Scalable Technology

Lightweight OTAC applies across industries, beyond just devices.

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Cost-Saving & Hassle-Free Security

Cut token infrastructure. Reduce traffic, maintenance, and fraud costs.

How OTAC works

Build customisable, flexible solutions depending on your industry and use case. The generation of the code can happen locally on the device or even on the IC chip across a range of cards and applications. The format is then configurable to each client's needs, along with the transfer and verification.


This flexibility combined with configurable time intervals provides a highly flexible and super secure authentication solution across a wide range of industries, and unique to every client's needs and requirements.

 

International CC Certification for OTAC
Our OTAC technology has obtained the global CC standard for its strong security, stability and reliability. 

Patents
193 Registered,
337 Pending

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Award Highlights

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Hot Company in PLC Security at the 2025 Global InfoSec Awards
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swIDch_ 2024 Top InfoSec Innovator Awards Logo
Hot Company in Operational Technology (OT) Security at the Top InfoSec Innovator Awards 2024
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Cybersecurity Breakthrough Award 2022_swIDch
"Transaction Security Solutions of the Year" 2022 CyberSecurity Breakthrough Award
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Best IoT/IIoT Security Solution 2022 SC Awards
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2022 Gold Winner at 14th Annual 2022 Golden Bridge Business and Innovation Awards
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2021 Cybertech 100
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2 Winner BadgeCyber Tech
2020 Cybertech category winner of EUROPAS 2020 Award
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CyberSecurity Breakthrough Award 2020 (1)
“Authentication Solution of the Year” CyberSecurity Breakthrough Award 2020
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OTAC FAQs

  • OTAC stands for one time authentication code.

  • Static credentials such as card numbers, IDs, passwords, and PINs remain unchanged over time, making them vulnerable to theft and misuse. Cybercriminals can exploit these credentials through identity theft, card-not-present fraud, and account hijacking. Additionally, maintaining knowledge-based authentication systems is costly and burdensome for both users and organisations.

  • OTP (One-Time Password) cannot independently verify a user’s identity. It always requires an initial authentication step, typically a username and password. This multi-step process increases complexity for users while still relying on static credentials for the initial login, leaving vulnerabilities open to exploitation.
  • Many authentication methods, such as tokens, depend on a network connection to validate user access. In areas with limited connectivity, authentication can become unreliable or even impossible. Token-based authentication also requires a connection between a user, a server, and a third-party service provider (TSP), restricting its use to controlled network environments.
  • OTAC eliminates the need for static credentials, reducing the risk of theft and fraud. Unlike OTPs, it performs both identification and authentication in a single step, streamlining the user experience. Additionally, OTAC operates without requiring a network connection, making it highly effective in offline or low-connectivity environments.
  • Yes, OTAC doesn’t require network connections or phone signal to work.

Why swIDch

OTAC, developed by swIDch, is the original technology
that provides all of the following features, tested and substantiated
by the University of Surrey technical report
Why swIDch
DYNAMIC CODE that is
sufficient to IDENTIFY user
Single-step IDENTIFICATION
and AUTHENTICATION
Uni-directional authentication in
off-the-network environment

Single-step identification and authentication with the code alone. Include our biometric option and get single-step MFA. Vastly improved UX by removing steps.

OTAC is a dynamic code, which means the code is constantly changing. Eliminates all use of static information. Forget usernames and passwords forever. Vastly reduced workload for IT helpdesks. 

No network connection required for generating OTAC, enabling uninterrupted use no matter where you are. No more waiting for additional tokens/OTPs and no need for heavy public key infrastructure (PKI). 

 

Highly configurable code parameters and lightweight SDK/applet means wide range of deployment options on many devices across multiple sectors.  

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'One-time-authentication-code' technical report by University of Surrey Get In touch

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