Listed below is an example for encrypting text using a Cipher.

Assumptions

The letters in the alphabet correspond to their counterparts in arithmetic notation mod 26. So the letters of the alphabet A-Z are represented by the numbers 0-25 respectively.

SAMPLEis initially coded as

18 0 12 15 11 4

Next a random stream of numbers is combined with the letter codes:

764803834416

Encoding the message:

180012151104

7648038344 16Add

944815985520Sum

162215200320Mod 26

Now convert into cipher text:

QWPUDU

Given the set of random numbers below, convert the word S E C R E C Y into cipher text:

Random number stream 18108865402225