Introduction of MAC (Mesage Authentication Code) | Application of Messsage authentication code | Importance of MAC

Message Authentication Code based on Block Cipher | MAC based on Block Cipher | Data Authentication algorithm (DAA) | Cipher based Message Authentication Code (CMAC)

HMAC & Message Authentication Codes — Why hashing alone is NOT ENOUGH for Data Integrity

Using SMS Text Authentication: Crucial Techniques And Pointers

Implement authorization code grant manually