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A password to encrypt a document restricts opening and viewing it. This is possible in all Microsoft Office applications. Since Office 2007, they are hard to break if a sufficiently complex password was chosen. [citation needed] If the password can be determined through social engineering, the underlying cipher is not important.
A PDF file may be encrypted, for security, in which case a password is needed to view or edit the contents. PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF.
In addition, password-cracking programs can brute-force attack passwords at a rate of hundreds of thousands of passwords a second, which not only lets them decrypt a document but also find the original password. In Excel 2003/XP the encryption is slightly better – a user can choose any encryption algorithm that is available in the system (see ...
The password can contain up to 255 characters and uses AES 128-bit advanced encryption by default. [65] Passwords can also be used to restrict modification of the entire document, worksheet or presentation. Due to lack of document encryption, though, these passwords can be removed using a third-party cracking software. [66]
Cryptographic service providers can be used for encryption of Word, Excel, and PowerPoint documents starting from Microsoft Office XP.A standard encryption algorithm with a 40-bit key is used by default, but enabling a CSP enhances key length and thus makes decryption process more continuous.
Special characters - remove special characters from the title and try again. Unsupported web browser - make sure you're using a supported web browser. Some file types present a security risk - AOL Mail doesn't support some file types, such as .exe, .bat, .jar and others, because they can be used to distribute malware.
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Information rights management (IRM) is a subset of digital rights management (DRM), technologies that protect sensitive information from unauthorized access. [1] It is sometimes referred to as E-DRM or Enterprise Digital Rights Management.
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