Learning Team: Apply Encryption Standards

Your team was invited to present to a high school IT class to explain how cryptography works. In order to explain the basics, you decide to show the class a tool called, CrypTool. This web-based tool allows people to visualize encryption and decryption using common cryptography techniques. In order for the students to follow along with your demonstration, you need to create a tutorial for them.

Together as a team, access CrypTool (http://www.cryptool-online.org/).

Click on the CrypTool link, then click Ciphers.
Click and choose a type of cipher you would like to use under Classical Ciphers.

Use CrypTool to do the following:

• Determine at least five pieces of data to encrypt and decrypt
• Determine a key (or a set of keys) that is different from the samples provided in CrypTool.
• Attempt to break the encrypted ciphertext data using the cryptanalysis tools provided by CrypTool.

Note: It may not always be possible to break the ciphertext. Regardless of the attempt's outcome. Document the steps taken and relevant observation notes.

Create a tutorial with text and images (screenshots) on how to use CrypTool.

Include the following:

• Steps needed to encypt data
• Steps needed to decrypt data
• Steps taken to attempt to break the encrypted data using the cryptanalysis tools provided by CryptTool.