---
title: "Introduction"
slug: "certificate-signing-introduction"
updated: 2024-10-09T06:08:44Z
published: 2024-10-09T06:08:44Z
canonical: "docs.onespan.com/certificate-signing-introduction"
---

> ## 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.

# Introduction

The OneSpan Personal Certificate Client (PCC) enables users to sign with a digital certificate that resides on a Smart Card or hardware token.

The following sections contain important PCC information for administrators:

- [Personal Certificate Client Prerequisites](/v1/docs/personal-certificate-client-prerequisites)
- [Personal Certificate Client Installation](/v1/docs/personal-certificate-client-installation)
- [Communicating via WebSocket](/v1/docs/communicating-via-websocket)
- [Authenticating Servers](/v1/docs/authenticating-servers)
- [Security Measures for Customers](/v1/docs/security-measures-for-customers)

> Certificate Signing is subject to the following restrictions:
> 
> - PCC signing is supported only via the use of Smart Cards or hardware tokens.
> - Signing with a certificate is available for Microsoft Windows and macOS.
> - It works with all supported browsers (Edge, Firefox, Chrome, Safari).
> - It does not work from a tablet or mobile device, including Microsoft Surface Pro.