The Implementation of ROT13 cipher on PIC16F84 « The Hardware Side of Cryptography

14 May 2008

The Implementation of ROT13 cipher on PIC16F84

Filed under: decoding, encoding, encryption — Tags: Classic Cipher, Classical Cryptography, Microcontroller, PIC16F84, ROT-13, ROT13, Shifting Cipher — edipermadi @ 9:08 am

ROT13 or ROT-13 cipher is a classic and simple cipher. ROT13 works exactly the same as caesar cipher, except the shifting key was fixed to 13. We may say that ROT13 is a special case of Caesar Cipher . To encrypt, you simply shift plain text by 13. To decrypt you simply shiftback cipher text by 13. This simple cipher was pretty famous, you may find this cipher on online forum to hide offensive words or to avoid spoilers :8 .

I alse wote a ROT13 code for PIC16F84 microcontroller on MPLAB 8.0. I’ve simulated the program and it works perfectly the same as what i expected. You may download the source code on download section. You may freely use this code under the term of GPL v3.0 license. The screenshots are shown below.

Example

Plain Text : YOU KNOW, MY BOSS IS A REAL JERK I CAN NOT BELIEVE HE ASSIGNED ME A HELL OF PROJECT
Cipher Text : LBH XABJ, ZL OBFF VF N ERNY WREX V PNA ABG ORYVRIR UR NFFVTARQ ZR N URYY BS CEBWRPG

plain text