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hi everyone in this video we are going to discuss about hashed message authentication code or hmac so we have discussed in our previous video about message Integrity of the data Integrity which is one of the five key principles which should be the goals of any cyber security professional to ensure that the information remains secure so one of the goal was uh message integrity and that message in Tech radio to achieve that message Integrity we discussed in detail about the use of hash function but today we are going to discuss uh so we discussed something about integrity and today we are going to discuss hmac which will not only be providing us Integrity of the message but it will also be giving us authentication and authentication refers to the verification of the identity of the sender of the message so for that we use hash function and hash function actually is a function letamp;#39;s say thereamp;#39;s a magic box and in that magic box let me bring my fan here excuse me here so th