The more levels of security you have on your Mac, the safer your files will be. This is particularly true if you allow multiple people to use your computer. For your most sensitive files, it's a good ...

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Move over viruses, step aside worms: Ransomware has the spotlight and isn't about to give it up. From taking down entire fuel pipelines to hijacking hospital networks, it's the cyberattack du jour.

Microsoft Excel lets you embed content from other applications, including PDF files. You can embed a PDF file into a cell of an Excel worksheet and then use Excel's security features to lock the ...

Imagine working on a key document in Google Drive, only to find out later that someone made unwanted changes. To prevent this ...