After completing this experiment, you will be able to:

1. Understand Basic Cryptography Concepts

   • Comprehend the fundamental principles of encryption and decryption
   • Recognize the importance of key space in cryptographic systems
   • Understand why secure encryption is not possible with small keyspace (principle of large key space)

2. Master Shift Cipher Operations

   • Perform encryption using the shift cipher algorithm
   • Execute decryption using the shift cipher algorithm
   • Calculate the total number of possible keys for a given alphabet

3. Analyze Cryptographic Security

   • Identify vulnerabilities in the shift cipher
   • Understand why the shift cipher is considered insecure
   • Recognize the importance of key space size in cryptographic security

4. Develop Cryptanalysis Skills

   • Apply brute force attacks to break shift cipher encryption
   • Use frequency analysis to decrypt messages
   • Determine encryption keys from known plaintext-ciphertext pairs

5. Apply Practical Knowledge

   • Implement shift cipher operations manually
   • Solve real-world cryptographic challenges
   • Evaluate the security of simple encryption schemes