AES Encryption

128-bit AES Encryption (Rijndael cipher) implemented using x86 assembly.

Dependancies

All you need is make and nasm.

Install them using your package manager.

Ubuntu and its derivatives

# apt-get update && apt install nasm make

Arch Linux

# pacman -S nasm make

Steps to run

• Clone this repo.
• Run make to build the and link the program.
• Run the executable using ./AES-Encryption.
• You can also run the executable as a server. To do so, run the executable with the port as an argument.
  • ./AES-Encryption 9001
  • This feature is a WIP.

How to use

The program has 2 modes, encryption and decryption.

• When encrypting, you just need to give it the key and the message as 16 byte long ascii strings.

  • You will get the encrypted message as a 4x4 matrix.

  • Ex:

    0x4C 0x46 0x9F 0xB6

    0x2D 0x7A 0x9B 0x90

    0xB7 0xDF 0xFC 0xB3

    0x28 0xA5 0x15 0x3A

• When decrypting, you have to give it the 16 bytes you were given as the encrypted message and the key. The encrypted message is give as 16 2-digit hex bytes, using lowercase characters for a-f.

More info on AES

• AES Explained (Advanced Encryption Standard) - Computerphile
• AES Rijndael Cipher explained as a Flash animation