Elsie Four
March 27, 2018
It’s been a while since we did any cryptography. Alan Kaminsky developed an algorithm that he claims is suitable for hand operation but is also quite secure. You can read about the cipher and Kaminsky’s cryptanalysis of it at the link.
Your task is to implement Kaminsky’s Elsie Four cipher. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.
Programming Praxis 