Posts tagged "privacy"
5 posts tagged with privacy.
Quad9 Is Leaving France on November 24: How to Switch DNS in Time
The non-profit DNS resolver at 9.9.9.9 will withdraw from France rather than block domains for French users. Here is who is affected and how to switch resolvers on routers, PCs and phones.
How to Test Your Microphone (and Fix It When It's Not Working)
Test any microphone in 30 seconds with a live level meter, then find what is silencing it: privacy switches, the wrong input device, a mute button or a busy app.
Understanding Image Metadata: What EXIF Data Reveals About Your Photos
Every photo your phone takes embeds GPS coordinates, device model, lens serial number, and timestamp — all invisible but readable by anyone who downloads the file. Here is what EXIF data contains and how to remove it.
Common PDF Redaction Mistakes That Leak the Information You Tried to Hide
From the TSA 2014 manual to the Manafort 2019 filing, the most famous PDF redaction failures all happened the same way — a black rectangle drawn in a generic editor over text that was never actually removed. Here are the specific mistakes and how to verify before you ship.
How PDF Redaction Actually Works (And Why Black Boxes Are Not Enough)
Drawing a black rectangle over text in a PDF does not redact it. We show how proper redaction strips the underlying content stream, why metadata matters, and famous cases where it went wrong.