> For the complete documentation index, see [llms.txt](https://docs.maitredpos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.maitredpos.com/maitred/maitred-pa-dss-implementation-guide/pa-dss-requirement-8.2.md).
# PA-DSS requirement 8.2
Use only necessary and secure services, protocols, components, and dependent software and hardware, including those provided by third partie
Maitre’D has very few dependencies in regards to 3rd party software, services or protocols. These will vary depending on the modules that are used.
\
Hardware dependencies
Maitre’D has no specific hardware dependency.
### Software dependencies
**EFT Client software**
When an integrated solution is in use, a 3rd party client software or “middleware” needs to be used. Maitre’D will pass the credit card information to the middleware for processing. Information coming back from the acquirer/processor takes the opposite way, from the internet to the middleware, and then back to Maitre’D.
Supported EFT middleware for integrated credit card payments:
* Datacap DSIClientX version 3.86 (File version 3.8.6.0, dated December 3rd, 2012)
### Service dependencies
**Crypkey License**
The Crypkey license service is required to validate the Maitre’D license activation key, and needs to be running all the time.
**Protocol dependencies TCP/IP**
The TCP/IP protocol is required for network communication
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