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Design the cryptosystem by providing step by step implementation of the encryption algorithm of Hash-based Message Authentication Code in C Language that h as encryption
Design the cryptosystem by providing step by step implementation of the encryption algorithm of Hash-based Message Authentication Code in C Language that has encryption but no decryption using SHA5 to calculate the HMAC.
The program should include these steps of HMAC:
- Original Message and text will be used to find the digest function
- Sender should calculate key and HMAC then send it to receiver with the message included
- Receiver now recalculates the HMAC using the secret key and message
- Receiver should compare the sent and calculated HMACs.
- Receiver can confirm that the message was not altered if the HMACs calculated are the same
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