1# Border Router Tools 2 3## PSKc Computer 4 5`pskc` computes a Pre-Shared Key for the Commissioner (PSKc). The PSKc is used to authenticate an external Thread Commissioner to a Thread network. Build and install OpenThread Border Router to use this tool. 6 7## Steering Data Computer 8 9`steering-data` computes steering data, which is used to filter new devices joining Thread network. 10 11See [Tools and Scripts](https://openthread.io/guides/border_router/tools) for more info. 12