Computer Forums MOD Question

 06-28-2013, 03:55 PM #1 Beta Member   Join Date: Jun 2013 Location: England Posts: 2 MOD Question Hi there, I have a question about how to reverse MOD. Its for a computing course where I have to write my own encryption, but to prove it works I need to write the decryption. I've used MOD on a number and used 26 as the divisor because each number eventually needs to represent a letter (I've made a table and used the VLOOKUP function to return the original letter into another). Any help would be greatly appreciated, Henry __________________
06-29-2013, 12:42 PM   #2
In Runtime

Join Date: Jan 2007
Posts: 398
Re: MOD Question

Quote:
 Originally Posted by HenryNoble Hi there, I have a question about how to reverse MOD. Its for a computing course where I have to write my own encryption, but to prove it works I need to write the decryption. I've used MOD on a number and used 26 as the divisor because each number eventually needs to represent a letter (I've made a table and used the VLOOKUP function to return the original letter into another). Any help would be greatly appreciated, Henry
Mathematically it's not possible to have an inverse mod operator.
See this link for an explanation.
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