> For the complete documentation index, see [llms.txt](https://docs.simplespa.net/simplespa-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.simplespa.net/simplespa-documentation/extras/faq/how-does-simplespa-transmit-data-securely.md).

# How does SimpleSpa transmit data securely?

At SimpleSpa we use Transport Layer Security (TLS), a form of data encryption, to ensure the privacy of all Internet communications both in our app and when clients are paying from your SimpleSpa online address:

* Individual user sessions are identified by a unique username at login
* Multiple layers of monitoring devices, including Web Application Firewall (WAF)
* Intrusion Prevention System capabilities