<p><img alt="3. MAC, 20pt Suppose that one of the h or h below is acollision resistant hash function. Proof that is a ision resistant hash funtion" src="https://d2vlcm61l7u1fs.cloudfront.net/media%2Fa49%2Fa49a2689-d241-41d1-b3d6-449ec401ade5%2FphpuBlw2g.png" style="height:176px;width:463px;" aria-describedby="d3f"/></p>3. MAC,