High-Bandwidth　Digital　Content　Protection(HDCP)-it　is　a　technology　method　which　is　used　to　protect　the　high　definition　signs.　This　paper　focuses　on　design　and　verification　of　authentication　part,　the　most　important　of　a　HDCP2.2　transmitter.　Besides　architectural　analysis　and　design　approach　discussions,　a　detailed　micro　architecture,　including　signature　verification,　key　encryption　and　revocation　list　comparison,　is　proposed　and　verified.　The　HDCP　transmitter　authentication　part　based　on　RSA,　SHA256,　HMAC,　AES　algorithm　could　verify　the　System　Renewability　Message　from　video　source,　accomplish　the　c　for　HDCP　receiver　and　provide　the　session　key　for　encryption.　©　2016　IEEE.