---
title: "TLS configuration"
slug: "digipassone-tls-configuration"
updated: 2026-10-27T19:53:19Z
published: 2026-10-27T19:53:19Z
canonical: "docs.onespan.com/digipassone-tls-configuration"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# TLS configuration

## Introduction

Use of TLS-secured communications between your application and the Client is mandatory and ensures the integrity of interactions between your application and the Client’s authenticators. In addition, it is important to establish trust between the DigipassONE API Server and the Authentication Server. Instructions for both of these configurations are included here. Note that this applies only to non-CDT deployments.

Formerly known as Digipass S3.