Digraphs on given positions probabilities     Frequencies of occurrence of each of the possible 256*256*256=2^24 triplets of two consecutive output bytes and the n variable were measured (Output[x], Output[x+1], n) in a stream of 2^40.3 output bytes generated by the VMPC Stream Cipher. With consideration of the fact that 16777216 variables were tested - none of the measured frequencies showed a statistically significant deviation from its expected value of 1 / 16777216. Similar test run by Greg Rose found no bias in the digraphs on given positions probabilities in a stream of 2^41.85 bytes. To contact Greg Rose you can visit his homepage by Bartosz Zoltak  and  Greg Rose Copyright © 1999-2018 by Bartosz Zoltak