APS Excellence in Physics Education Award
November 2019

Education Prize Logo
Science SPORE Prize
November 2011

NSF Logo
The Open Source Physics Project is supported by NSF DUE-0442581.

Breaking AES Encryption Model Documents

This material has 2 associated documents. Select a document title to view a document's information.

Main Document

Breaking AES Encryption Model 

written by Wolfgang Christian

The Breaking the AES Cipher Model encrypts a plaintext message using AES encryption and attempts to break this encryption using a plaintext attack.  The attacker (Eve) obtains both the plaintext and the cyphered text for a message between two people, Alice and Bob, and systematically encrypts the plaintext using the AES encryption function with all possible keys until the function's output matches the known cyphered text.  Eve starts with a key, feeds the key and the plaintext into the encryption function,  and checks whether the cyphered text is equal to the known value.  If so, Eve has found the correct key.  Otherwise, Eve systematically changes the key until she is successful. If the key is small or if Eve knows some of the key, the computational task may be manageable.  This model displays the computation time using both a sequential and a parallel do-loop implementation of the plaintext attack.  The model is designed to show how Java performs standard AES encryption and to test the speedup and sizeup of parallel computation using multi-core processors.

The Breaking the AES Cipher Model was created using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the model's jar file will run the simulation if Java is installed.

Last Modified June 2, 2014

This file has previous versions.

Source Code Documents

Breaking AES Encryption Source Code 

The source code zip archive contains an XML representation of the Breaking AES Encryption Model.  Unzip this archive in your EJS workspace to compile and run this model using EJS.

Last Modified October 11, 2013

This file has previous versions.

OSP Projects:
Open Source Physics - EJS Modeling
Physlet Physics
Physlet Quantum Physics
STP Book