panic_bcast is a decentralized network protocol panic button that operates through UDP broadcasts and HTTP communications. The tool is designed to provide emergency shutdown capabilities across networked systems to prevent cold boot attacks and protect sensitive data. The system works by allowing any machine in the network to trigger a panic signal via HTTP request to port 8080 or through UDP broadcast. When the panic signal is received, panic_bcast automatically terminates TrueCrypt processes and powers down the target machine. The tool supports authentication through an optional key parameter that gets appended to the panic signal string. It is designed to run on UNIX-based systems and has been tested on FreeBSD and Linux platforms. panic_bcast is intended for use in sensitive network environments where rapid system shutdown may be necessary to protect against physical access attacks or data compromise scenarios.