1. Pick two prime numbers, and .
2. Calculate .
3. Calculate . The is often called totient.
4. Chose a prime number so that is co-prime to (meaning, is not divisible by ).
5. Take note of and , you will need them later.
6. Now, use the following equation to calculate .
7. Take note of , you will also need it later.
8. Now, choose any number P.
9. Calculate . Take note of .
10. Now, assume you forgot what your number P was. The way to get that number P back is using this equation: . Calculate , using your values for .
11. Post these steps and the numbers n and k, j, P and E in the Discussion Forum. Discuss what functions these numbers have and how they might be used in computing.