VECIHXEJZXMA Step 2: Review the cipher keyword. The following message has been encrypted using the Vigenère cipher: In Part 1, you will analyze an encrypted message and decrypt it using a cipher key and the Vigenère cipher square. Part 1: Decipher a Pre-Encrypted Message Using the Vigenère Cipher If students are not working with a partner, they can perform the parts of the lab where a partner is referenced using their own files.The main goal is to expose students to a common type of encryption/decryption cipher known as Vigenère.Note: Students can work in teams of two for this lab. Vigenère is an example of a common type of cipher mechanism called polyalphabetic substitution. The Cisco IOS password encryption service uses a Cisco-proprietary algorithm that is based on the Vigenère cipher. Use an interactive Vigenère decoding tool to verify decryption. Exchange messages and decipher them using the pre-shared key.ĭ. Create a secret message using the Vigenère cipher and the key.Ĭ. Work with a lab partner and agree on a secret password.ī. ![]() Part 2: Create a Vigenère Cipher Encrypted Message and Decrypt ItĪ. Use an encrypted message, a cipher key, and the Vigenère cipher square to decipher the message. Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only. 7.5.1.2 Lab – Exploring Encryption Methods (Instructor Version)
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