# crackle > Crack and decrypt Bluetooth Low Energy (BLE) encryption. > More information: . - Check whether the recorded BLE communications contain the packets necessary for recovering temporary keys (TKs): `crackle -i {{path/to/input.pcap}}` - Use brute force to recover the TK of the recorded pairing events and use it to decrypt all subsequent communications: `crackle -i {{path/to/input.pcap}} -o {{path/to/decrypted.pcap}}` - Use the specified long-term key (LTK) to decrypt the recorded communication: `crackle -i {{path/to/input.pcap}} -o {{path/to/decrypted.pcap}} -l {{81b06facd90fe7a6e9bbd9cee59736a7}}`