An n-key cryptosystem
Create a random n by n matrix:
- 2x^2+x+3
- x^2-3x+4
- 5x^2+7x-4
Distribute 1 row to each participant
A message E(x) is generated by producing the output of the equation for x: f(x) - for row 1: f(8)=128+8+3=139
To get back the message, the other users combine keys, solve for x, and retrieve the message
Without all the equations, 139 could translate to ANYthing