To protect your PowerPoint 2010 presentation, use the following options.

1. In an open presentation, click the File tab. The Backstage view opens.
2. In the Backstage view, click Info.
3. In Permissions, click Protect Presentation. The following options appear:

– Mark as Final: Make the document read-only

When a presentation is marked as final, typing, editing commands, and proofing marks are disabled or turned off and the presentation becomes read-only. The Mark as Final command helps you communicate that you are sharing a completed version of a presentation. It also helps prevent reviewers or readers from making inadvertent changes to the presentation.

– Encrypt with Password: Set a password for the document

When you select Encrypt with Password, the Encrypt Document dialog appears. In the Password box, type a password. Important: Microsoft cannot retrieve lost or forgotten passwords, so keep a list of your passwords and corresponding file names in a safe place.

– Restrict Permission by People: Install Window Rights Management to restrict permissions

Use a Windows Live ID or a Microsoft Windows account to restrict permissions. You can apply permissions via a template that is used by your organization, or you can add permissions by clicking Restrict Access.

– Add a Digital Signature: Add a visible or invisible digital signature

Digital signatures authenticate digital information such as documents, e-mail messages, and macros by using computer cryptography. Digital signatures are created by typing a signature or by using an image of a signature to establish authenticity, integrity, and non-repudiation. See the link at the end of this topic to learn more about digital signatures.