Glenn FleishmanSenior Contributor, Macworld

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Glenn Fleishman is the author of dozens of books, including his newly released A Practical Guide to Networking, Privacy, and Security in iOS 10, a book that has information and step-by-step advice on connecting to and managing networks, and securing your data and your privacy. He's a senior contributor to Macworld, where he writes the Private I and Mac 911 columns and hosts the Macworld podcast, and contributes regularly to many periodicals.

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The backdoor that never was, and how to improve your security with WhatsApp

A Guardian report says WhatsApp has a backdoor that could allow messages to be intercepted by unwanted parties. That’s not accurate.

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How to stop macOS Photos from re-uploading all your images and videos

The spoiler: there’s no way to force iCloud Photo Library to recognize existing media, but you can pause or stop the uploads.

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Anonymous browsing with Tor reduces exposure but still has risks

The pros and cons of using Tor to browse anonymously on your Mac, and how to get started.

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How to block certain calls in iOS 10

Gain more control over what calls you receive with these apps.

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How to kill the evercookie and supercookie, the cockroaches of tracking

Unscrupulous ad networks and others bury tracking IDs in your browser like ticks under your virtual skin. Can you exterminate all their traces?

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How to browse privately and avoid persistent tracking on a Mac, iPhone, and iPad

All browsers let you go incognito when you want to prevent leaving virtual footprints. On the Mac, Safari, Firefox, and Chrome have private browsing, and Safari offers this on iOS too.

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How to encrypt a bootable clone in macOS

A reader wants to protect the bootable clone he makes of his startup volume just as effectively.

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Lock down your Mac with system and networking monitoring tools

A way to improve the integrity of your Mac is to know exactly what's happening on it.

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Podcast 541: The iPhone turns 10

Susie and Glenn take a chance to reminisce about the iPhone's introduction, a full decade ago.

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How to protect your online conversations with Signal's end-to-end encryption

In a world of snoopers, end-to-end encryption is the only sensible path to take. Apps like Signal and the strategic use of VPNs are a must.

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How to delete images from Photos for macOS without getting rid of them

A reader wants the convenience of deleting images without the ticking clock imposed in Photos: hiding media is the right solution.

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Protecting your data, protecting yourself: A first installment

Suppose you're a dissident. How do you keep your data safe on your iPhone, iPad, and Mac, not to mention online? Glenn Fleishman explains, in the first of a series.

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How to avoid deleting photos from iCloud while traveling

Another twist in the ongoing untangling of iCloud Photo Library and local storage comes via a reader's mother.

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Podcast 540: Happy new year?

It's 2017 and we're happy to be alive, but troubling news abounds.

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How to make sure Time Machine backs up external drives

A reader wants to shift his Photos and iTunes libraries to an external drive and ensure they're backed up by Time Machine.