# How to read a qualified electronic signature?

To read a qualified electronic signature, install the required software on your computer. You must do this manually.

### Installation

Update your OS and browser to the latest version.

1. Download and install the crypto library:
   * [macOS](https://iit.com.ua/download/productfiles/EUSignWebInstall.pkg)
   * [Windows](https://iit.com.ua/download/productfiles/EUSignWebInstall.exe)
2. Add the [browser extension](https://chrome.google.com/webstore/detail/%D1%96%D1%96%D1%82-%D0%BA%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87-%D1%86%D1%81%D0%BA-1-%D0%B1%D1%96%D0%B1%D0%BB/jffafkigfgmjafhpkoibhfefeaebmccg?utm_source=chrome-app-launcher-info-dialog).
3. Restart your computer.

### Read the key

1. Wait until device search is finished.

<details>

<summary>Click to view the screenshot...</summary>

![](https://docs.docstudio.com/en/latest/_images/searching-device.png)

</details>

2. Select your hardware key.
3. Enter the key password.
4. Click <a class="button secondary">Read key</a>.

If the password is valid and the key is valid, you will see signature details and the next step.

If not, you will see an error message.

<details>

<summary>Click to view the screenshot...</summary>

![](https://docs.docstudio.com/en/latest/_images/open-device.png)

</details>

When you enter valid data, you will see key information for signing the document.

<details>

<summary>Click to view the screenshot...</summary>

![](https://docs.docstudio.com/en/latest/_images/key-info.png)

</details>


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