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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.
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 ...
A backdoor is a typically covert method of bypassing normal authentication or encryption in a computer, product, embedded device (e.g. a home router), or its embodiment (e.g. part of a cryptosystem, algorithm, chipset, or even a "homunculus computer"—a tiny computer-within-a-computer such as that found in Intel's AMT technology).
• Use a strong password and change it regularly - Create a strong password to minimize the risk of unauthorized account access. • Add another level of security - Turn on two-step verification and get sent a security code when someone logs in from an unfamiliar device or location.
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.
The ISO/IEC 26300 OpenDocument standard specifies encryption of files, which is based on sha1, Blowfish, and RFC 2898. Microsoft Office 2007 SP2 does not support reading and writing encrypted (password protected) ODF files. [58] [59] [60] Users are presented with a message: “cannot use password protection using the ODF format.” [58] [60]
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However, Microsoft admits that the password adds very little protection, due to the existence of commonly available tools which can remove or simply bypass the password protection. [6] The password to access the table is stored without the first and last XOR CRC-32 integer representation of itself in the .pst file. Outlook checks to make sure ...