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  • Microsoft PowerPoint Password Recovery


    Microsoft PowerPoint documents can utilize two passwords:

    • Password to open
    • Password to modify

    Password to open

    The Password to open requires a user to enter a password to view the document.

    When the user sets a Password to open, the entire Microsoft PowerPoint document is encrypted with the RC4 stream cipher.

    Password to modify

    The Password to modify requires a user to enter a password to make changes to the document.

    When a user sets a Password to modify, the password is stored inside the Microsoft PowerPoint document. The password can be viewed or changed with a hex editor.

    Applying passwords in Microsoft PowerPoint

    To apply a Password to open or a Password to modify to a Microsoft PowerPoint document, click , , , .

    If you select you can select which encryption algorithm you wish to use and what key length you wish to use with that algorithm.

    Encryption algorithms supported by Microsoft PowerPoint are:

    • Weak Encryption (XOR)
    • Office 97/2000 Compatible
    • RC4, Microsoft Base Cryptographic Provider v1.0
    • RC4, Microsoft Base DSS and Diffie-Hellman Cryptographic Provider
    • RC4, Microsoft DH SChannel Cryptographic Provider
    • RC4, Microsoft Enhanced Cryptographic Provider v1.0
    • RC4, Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider
    • RC4, Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)
    • RC4, Microsoft RSA SChannel Cryptographic Provider
    • RC4, Microsoft Strong Cryptographic Provider

    The default is “Office 97/2000 Compatible” — however even Microsoft states that this is not recommended!

    Microsoft PowerPoint Password Recovery

    It is possible simply to edit the Password to modify with a hex editor.

    The Password to open can be attacked with a dictionary attack or a brute force attack.

    Elcomsoft Advanced Office XP Password Recovery is the only program I know of which is available to help you recover a lost Microsoft PowerPoint password.

    • Elcomsoft Advanced Office XP Password Recovery

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