PC4 Block cipher encryption source code for DMR RADIO.
PC4 was released in 2015. It's a block cipher specifically designed for DMR radio communication systems. It uses 253 rounds and the key size can vary from 8 bits to 2112 bits. The block size is 49 bits, the exact size of an AMBE+ DMR voiceframe.
The algorithm is used, for example, in the Voice Crypt firmware for the Tytera MD390/MD390 radios : https://archive.org/details/voice-crypt-1.0a