Im trying to reverse engineer a protocol in which some text is sent and has a specific number appended. I figured out that the number is some kind of a checksum (depends on the text somehow) and also that it increments by one on cases such as this: "aaaaaaab" = X and "aaaaaaba" = X+1. Does anyone here have any idea what I could be dealing with?
iiiiiiii = 4d0b iiiiiiil = 920b iiiiiill = ce0b iiiiilll = 120c iiiillll = 5a0c iiilllll = 990c iillllll = dd0c illlllll = 210d llllllll = 680d liiiiiii = 940b iliiiiii = 950b iiliiiii = 960b iiiliiii = 970b iiiiliii = 980b iiiiilii = 990b iiiiiili = 9b0b iiiiiiil = 920b aaaaaaaa = 210f aaaaaaab = a110 aaaaaaba = a210 aaaaaaca = 9f0f aaaaaacb = 1f11 baaaaaaa = a610
The second part is what I have deduced to be the number which depends on the string. It's also obvious from the data that the first two digits are least significant.