Description of the Intermediate Value Known Answer Test

 --------------------------------------------------------

 The test encrypts one plaintext with a variable number of rounds.

 In ECB encryption mode, the output PTi is the output after the 

 initial key addition and i rounds (a round ends with a key

 addition). 

 As explained in the documentation, in ECB decryption mode 

 there are several definitions of a `round' possible. In order

 to make visual inspection more intuitive, we output the

 intermediate values that correspond with the output of the

 encryption mode. 

 These values might actually not occur in a practical decryption,

 especially in an optimised implementation, where various operations

 of different rounds are interchanged.

 This explains also why the Java and the C code output different

 files for this test.