Disclaimer: I have previously posted this question multiple of times but the answers were always either incorrect or incomplete. Also in the comments, no one answered. Please read through the steps well as each part is required.

Subject: Information Security

Title: HMAC: Hash-based Message Authentication Code

Steps: You are required to design the crypto system. 1. System design: provide step by step implementation of the encryption algorithm of Hash-based Message Authentication Code

2. Testing and error correction: Test each part of the design and list the errors you encountered during the design process (a table that describes each error separately)

3. Include diagrams

NOTE!!!! : The implementation can be written in C Language Code ( with COMMENTS because I am not familiar with C Language and I need to understand the meaning of each line of code) or done using Excel Functions.

Thank you !