First outputs probabilities     Frequencies of occurrence of each of the possible 2^8 values on each of the first 256 byte-positions of the keystream generated by the VMPC Stream Cipher were measured. [In "A Practical Attack on Broadcast RC4" Itsik Mantin and Adi Shamir show that the second output of RC4 takes on value 0 with probability 1/128 instead of 1/256.] A test of 2^40.3 bytes generated by the VMPC Stream Cipher for 2^32.3 different keys showed that each of the possible 256 values on each of the first 256 positions is taken on with probability statistically insignificantly different from the expected 1 / 256. by Bartosz Zoltak Copyright © 1999-2018 by Bartosz Zoltak