bfs_encrypt just XORs the given password char for char with the corresponding char from the FHEM unique id (like 2a95084455f63205c3be85e728760f55). But the FHEM unique id is not a secret and accessible to everybody on a host (644 for FHEM/FhemUtils/uniqueID which contains the unique id also). XOR is only a sufficient encryption algorithm for one time pads, which the unique is most definitely not.
bfs_encryptjust XORs the given password char for char with the corresponding char from the FHEM unique id (like 2a95084455f63205c3be85e728760f55). But the FHEM unique id is not a secret and accessible to everybody on a host (644 forFHEM/FhemUtils/uniqueIDwhich contains the unique id also). XOR is only a sufficient encryption algorithm for one time pads, which the unique is most definitely not.