diff --git a/FSCS630_Cryptography/labs/Hashbased_Message_Authentication_Code/HMAC_lab_Manual.pptx b/FSCS630_Cryptography/labs/Hashbased_Message_Authentication_Code/HMAC_lab_Manual.pptx
index dfc23b4..4b45931 100644
Binary files a/FSCS630_Cryptography/labs/Hashbased_Message_Authentication_Code/HMAC_lab_Manual.pptx and b/FSCS630_Cryptography/labs/Hashbased_Message_Authentication_Code/HMAC_lab_Manual.pptx differ