Error Code 80029023 occurs in Playstation 3 and caused by an issue with exchanging key information.
To solve this error :
- Ensure your internet connection is up and running.
- Check to see if your router settings are correct.
- Restart your Playstation 3 and router.
- Try repairing your network connection.
- Try creating a new connection on the by accessing the Network Settings menu option on the PS3.