how can i insert security to my excel files
 

i want to put pass word security code to my excel file how can i do

Protect an Excel file
 

Try this:

Select File Info.
Select the Protect Workbook box and choose Encrypt with Password.
Enter a password in the Password box, and then select OK.
Confirm the password in the Reenter Password box, and then select OK

Let me know if this was helpful.

Regards,
Jerry