Scene developer @notzecoxao informs us on Twitter, that ZeroTolerance has released a much better/faster version of 'ps3encdec': notzecoxao said:
the encdec emulator supports all crypto types (NAND/NOR/ARCADE NAND/ ARCADE NOR) and, being is C, is faster than the original one (between 1-3MBps on creating decrypted/encrypted file) and this can be improved by using OpenCL or other multithreading tools.