The Enigma binary cipher presented here is a symmetric key stream cipher based on the German WWII Enigma cipher.

The Enigma binary cipher provides a number of configuration abilities to provide a unique and strong encryption.

• Provides an API for developing custom: rotor, plug-board, reflector, and entry rotor.
• Provides methods to generate entry rotor, rotors, plug-board, and reflector end points.
• Provides auto generation of entry rotor, rotors, plug-board, and reflector end points for quick use.
• Provides auto generated initial rotors starting point, the symmetric key. This is because human beings are poor random number generators.
• Settings can be exported or imported.

The souce code is written in C# and targeted for the .Net Framework 4.0 and later. Download the entire project and compile.

Once you have compiled the project reference the dll in your Visual Studio project. Then in your code file add the following to the collection of using statement.

using Ekstrand;

Encryption example:

Byte[] m_ToEncryptMsg;	  // Byte array to be encrypted.
Byte[] m_EncryptedMsg; // Byte array for encrypted.
EnigmaBinary ebc = new EnigmaBinary();	// Create a new instance.
ebc.Init();		// Initialize the cipher which includes generating the entry rotor, rotors, plug-board, and reflector end points.
EnigmaBinaryParameters ebp = ebc.ReturnConfiguration();	// Create a enigma binary parameters object which would have all the cipher settings.

//Method parameters: byte[] toEncrypet, starting index, end index, byte[] encrypted, starting index
ebc.ProcessBytes(m_ToEncryptMsg, 0, m_ToEncryptMsg.Length, m_EncryptedMsg, 0);

Decryption example:

Byte[] m_EncryptMsg;	// Byte array to be decrypted.
Byte[] m_DecryptedMsg;	// Byte array for decrypted.
EnigmaBinary ebc = new EnigmaBinary();	// Create a new instance.
ebc.Init(false,ebp);	// Initialize the cipher for decryption using cipher configuration parameters.

//Method parameters: byte[] To_decrypt, starting index, end index, byte[] decrypted, starting index
ebc.ProcessBytes(m_EncryptMsg, 0, m_EncryptMsg.Length, m_DecryptedMsg, 0);

The enigma binary cipher code is tested using NUnit. The NUnit testing consists of Unit-testing to integration testing of all logical components and is included as part of the project code.

MSDN-style code documentation can be found here.

1.0.0 Initial release into the wild.

If you'd like to contribute, please fork the repository and use a feature branch. Pull requests are always welcome.

Fred Ekstrand email: [email protected]

This project is licensed under the MIT License - see the LICENSE.md file for details.