Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


JT
Posts:
1,434
Registered:
4/7/12


How do i calculate number of possible transmission reciprocations?
Posted:
May 8, 2013 7:30 AM


If i have two gearwheels with 256 characters, each have a sign encoded for every (edge/tooth?) using a keyed permutation, and between them i have two transmission gears.
The set of transmission gears ranging from 3 tooths to 1024 tooths. How do i calculate A. Number of possible transmissions reciprocations B. The total number of states the rig can produce?
I was thinking this is as a old crypto device where we connect a main wheel with know characterset that is turned like a safe to write words and sentences, the two keyed permutation wheels is then xor to give the ciphertext. The keyed permutation is used to construct the two encoded wheels, and a hash from key is used to select the two wheels to interconnect them? Would it work?
256!^2*((1021*1020)/2) states?


Date

Subject

Author

5/8/13


JT

5/8/13


JT


