---
title: "Web PKI - Frequently Asked Questions"
description: "Frequently asked questions for developers about the Web PKI component: signData and signHash, signature output, digital signatures and SSL connections."
canonical: "https://docs.lacunasoftware.com/en-us/articles/web-pki/faq"
locale: "en"
product: "Web PKI"
last_updated: "2026-07-14"
---

# Web PKI - Frequently Asked Questions

Here you'll find answers to the most common questions on how to use the [Web PKI](https://docs.lacunasoftware.com/en-us/articles/web-pki) component.

> **Tip**
>
> This FAQ is targeted for **software developers**. If you are an end-user having trouble using
> one of our products, please go to our [Support Center](http://lacuna.help/) instead.

Questions:

* [What is the difference between the functions signData and signHash?](https://docs.lacunasoftware.com/en-us/articles/web-pki/faq/sign-data-vs-hash)
* [What is the signature format outputted by the functions signData and signHash?](https://docs.lacunasoftware.com/en-us/articles/web-pki/faq/sign-data-output)
* [How can I perform a digital signature with Web PKI?](https://docs.lacunasoftware.com/en-us/articles/web-pki/faq/digital-signature)
* [Does Web PKI support establishing SSL connections with the user's certificate?](https://docs.lacunasoftware.com/en-us/articles/web-pki/faq/ssl)