diff --git a/FSCS630_Cryptography/labs/Classic/XOR_Stream_Cipher.pptx b/FSCS630_Cryptography/labs/Classic/XOR_Stream_Cipher.pptx
index e68526c..eb14b6b 100644
Binary files a/FSCS630_Cryptography/labs/Classic/XOR_Stream_Cipher.pptx and b/FSCS630_Cryptography/labs/Classic/XOR_Stream_Cipher.pptx differ