This implementation includes the 64-bit and the 128-bit block encryption with up to 255 rounds. The key length can be from 0 up to 256 bits with a multiple of 8 bits.
For each algorithm the implementation has been verified with the test vectors provided in the specifications of IDEA NXT.
IDEA NXT was designed by Pascal Junod and Serge Vaudenay of the Swiss Federal Institute of Technology in Lausanne (EPFL).
The implementation has been tested on numerous UNIX systems and on both little endian and big endian platforms.