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---
layout: default
title: Secure images
---
# Secure images
Add additional security to your Glide image server with HTTP signatures. By signing each request with a private key, no alterations can be made to the URL parameters.
It is highly recommended that you use secure URLs in production environments.
## Configuration
Start by configuring the Glide server to validate each request before you output the image. In the event that the validation fails, Glide will throw an `SignatureException` exception.
~~~ php
validateRequest($request);
} catch (SignatureException $e) {
// Handle error
}
~~~
## Generating secure URLs
Next, generate a signature for each image request you make. Glide comes with a URL builder to make this process easy. Be sure to use the same signing key you configured earlier.
~~~ php
getUrl('cat.jpg', ['w' => 500]);
// Use the URL in your app
echo '
';
// Prints out
~~~