Mini AES represents AES in simple way. This cipher is consisted of 2 rounds 16 bits block size and key length. Its operation is mainly built of nibble XOR, nibble substitution, column shift and multiplication along GF(24) with modulo 0×03. The matrix multiplication of Mini AES mix column is designed such that the inverse process is equal to the process itself. In addition, shift row behaves the same as mixcolumn which its inverse process is equal to the process itself.
This code is developed is MPLAB v8.0 and released for free under GNU Public License v3.0 terms. Below are pictures taken during simulation
Plain Text
Cipher Text
Feel free to use this code and take your own risk 
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RELATED STUFF
Source Code | v1.0
Mini AES Specification
PIC16F84 Datasheet
Mid-Range Reference Manual
MPLAB v8.0
