Password to open
When a password for opening is set, the document's content is encrypted and cannot be viewed without the correct password.
Password to modify
The content of the document can be viewed but not edited. Office Password Recovery recovers such passwords immediately.
This type of protection is used to prevent unauthorized access to the VBA source code. The password for a VBA project can be either instantly recovered or instantly removed and replaced with a new one.
Microsoft PowerPoint can use one the following encryption methods, with encryption strengths varying from 40 to 128 bit:
Office Password Recovery supports all of them.