---
title: Security - Flutter (classic)
description: Data transfer and security information
lastUpdated: 16 March 2026
source_url:
  html: https://docs.contentsquare.com/en/flutter/security/
  md: https://docs.contentsquare.com/en/flutter/security/index.md
---

> Documentation index: https://docs.contentsquare.com/llms.txt
> Use this file to discover all available pages before exploring further.

The latest CSQ SDK is here! Learn how to [upgrade your app](https://docs.contentsquare.com/en/csq-sdk-flutter/experience-analytics/upgrade-from-cs-sdk/).

The Flutter SDK is designed with security and privacy in mind.

## Transmission and hosting

All data is encrypted in transport over HTTPS. Our hosting solution is a PCI DSS Level 1 Service Provider.

## What is not collected

* Passwords from password fields
* Geo location information
* Information from contacts, emails, or any other user identifiable information.
* Text from labels, buttons, and any other widget which contains text
* Accessibility information from any widget which the user interacts with
* Labels printed on the screen of any kind.