Cryptographic Hash Functions and Applications(HMAC)
After completing this experiment, you will be able to:
Understand Cryptographic Hash Function Fundamentals
- Comprehend the basic principles and properties of cryptographic hash functions
- Recognize the importance of determinism, fixed output size, and one-way properties
- Understand why hash functions are essential building blocks in modern cryptography
Master Hash Function Properties and Applications
- Analyze the collision resistance, pre-image resistance, and second pre-image resistance properties
- Apply hash functions like SHA-1 to compute message digests
- Understand the limitations and security considerations of different hash algorithms
Explore Message Authentication Code (MAC) Construction
- Understand the difference between integrity checking and authentication
- Learn why hash functions alone cannot provide authentication
- Recognize the need for secret keys in authentication schemes
Implement HMAC (Hash-based Message Authentication Code)
- Perform the complete HMAC construction process step-by-step
- Apply the HMAC algorithm using inner and outer padding mechanisms
- Execute manual calculations involving XOR operations and iterative hashing
Apply Practical Cryptographic Knowledge
- Implement hash function operations in a controlled environment
- Solve real-world message authentication challenges
- Evaluate the security properties and practical applications of HMAC in network protocols and secure communications