> For the complete documentation index, see [llms.txt](https://sandbox-docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/readme/developing_applications/cpdevkeys_userguide.md).
# Detampering and reloading warrantied keys on development units - VOS3
## Introduction
For detampering and reloading warrantied keys on development units, you can use the cpdevkeys app.
It can be accessed from SCP and can be used by application developers to simplify loading of development keys, as it does not require connection to a host PC.
## Loading development warrantied keys from SCP
You can access cpdevkeys from Security Control Panel. Go to **Control Panel → Security → Tamper → Detamper and load DEV Warrantied keys**
This will open the cpdevkeys app.
### UI Overview
1. Log view
2. Button for starting the keyloading
3. Button for clearing the log view
### Starting keyloading
In the app, press the **Start Keyloading** button.
You'll see logs displayed on-screen.
Once keyloading is complete, you'll see a pop-up notifying you of the result.
## Loading development warrantied keys from CLI
Cpdevkeys can also be started from the command line by running:
```cpp
$ cpdevkeys
```
---
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