There’s an Invisible Tracking Code Embedded in the Documents You Print

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iStock

Every job contract, term paper, and yard sale flyer you’ve printed at home may have something in common. According to Quartz, several big-name printer companies have been embedding hidden tracking codes in documents for decades.

The practice is no secret: It was first called to the public’s attention by an article that ran on PCWorld in 2004. That report revealed that Xerox embeds sequences of tiny yellow dots on every sheet of paper that passes through one of their copiers or laser printers. Known as printer steganography, the clusters are staggered about an inch apart across the entire page, but with each circle spanning a millimeter in size they’re impossible to detect without the proper equipment. If they were blown up and made darker you’d be able to see an encoded message containing the serial number and manufacturing code of the source printer.

Unless you use your printer for illicit purposes, this likely isn’t something you need to worry about. The codes are there to make it easier for the Secret Service to track counterfeiters. "It's a trail back to you, like a license plate," Peter Crean, a former senior research fellow at Xerox, told PCWorld.

With the advent of the color printer came a new way for felons to forge money and legal documents. Coded dots were first used to combat this problem in Japan, and they became standard in Xerox color printers sold in America in the mid-1980s.

Printer manufacturers aren’t obligated to implement the technology by law, so there’s a chance it's missing from your computer. There’s also no law forcing companies to be upfront about this hidden feature, so if your printer does have it, it may be difficult to tell. One way to check is with a blue LED light and a magnifying glass: If the yellow dots show up you can be sure that page is traceable back to your printer, whether you mail it across the country or staple it to a telephone pole.

[h/t Quartz]

10 Killer Gifts for True Crime Fans

Ulysses Press/Little A
Ulysses Press/Little A

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Humans have a strange and lasting fascination with the dark and macabre. We’re hooked on stories about crime and murder, and if you know one of those obsessives who eagerly binges every true crime documentary and podcast that crosses their path, you’re in luck—we’ve compiled a list of gifts that will appeal to any murder mystery lover.

1. Donner Dinner Party: A Rowdy Game of Frontier Cannibalism!; $15

Chronicle Books/Amazon

The infamous story of the Donner party gets a new twist in this social deduction party game that challenges players to survive and eliminate the cannibals hiding within their group of friends. It’s “lots of fun accusing your friends of eating human flesh and poisoning your food,” one reviewer says.

Buy it: Amazon

2. A Year of True Crime Page-a-Day Calendar; $16

Workman Calendars/Amazon

With this page-a-day calendar, every morning is an opportunity to build your loved one's true crime chops. Feed their morbid curiosity by reading about unsolved cases and horrifying killers while testing their knowledge with the occasional quizzes sprinkled throughout the 313-page calendar (weekends are combined onto one page).

Buy it: Amazon

3. Bloody America: The Serial Killers Coloring Book; $10

Kolme Korkeudet Oy/Amazon

Some people use coloring books to relax, while others use them to dive into the grisly murders of American serial killers. Just make sure to also gift some red colored pencils before you wrap this up for your bestie.

Buy it: Amazon

4. The Serial Killer Cookbook: True Crime Trivia and Disturbingly Delicious Last Meals from Death Row's Most Infamous Killers and Murderers; $15

Ulysses Press/Amazon

This macabre cookbook contains recipes for the last meals of some of the world’s most famous serial killers, including Ted Bundy, Aileen Wuornos, and John Wayne Gacy. This cookbook covers everything from breakfast (seared steak with eggs and toast, courtesy of Ted Bundy) to dessert (chocolate cake, the last request of Bobby Wayne Woods). Each recipe includes a short description of the killer who requested the meal.

Buy it: Amazon

5. Ripped from the Headlines!: The Shocking True Stories Behind the Movies’ Most Memorable Crimes; $15

Little A/Amazon

In this book, true crime historian Harold Schechter sorts out the truth and fiction that inspired some of Hollywood’s best-known murder movies—including Psycho (1960), Scream (1996), Arsenic and Old Lace (1944), and The Hills Have Eyes (1977). As Schechter makes clear, sometimes reality is even a little more sick and twisted than the movies show.

Buy it: Amazon

6. The Deadbolt Mystery Society Monthly Box; $22/month

CrateJoy

Give the murder mystery lover in your life the opportunity to solve a brand-new case every single month. Each box includes the documents and files for a standalone mystery story that can be solved alone or with up to three friends. To crack the case, you’ll also need a laptop, tablet, or smartphone connected to the internet—each mystery includes interactive content that requires scanning QR codes or watching videos.

Buy it: Cratejoy

7. In Cold Blood; $10

Vintage/Amazon

Truman Capote’s 1965 classic about the murder of a Kansas family is considered by many to be the first true-crime nonfiction novel ever published. Capote’s book—still compulsively readable despite being written more than 50 years ago—follows the mysterious case from beginning to end, helping readers understand the perspectives of the victims, investigators, and suspects in equal time.

Buy it: Amazon

8. Stay Sexy & Don’t Get Murdered: The Definitive How-To Guide; $13

Forge Books/Amazon

Any avid true crime fan has at least heard of My Favorite Murder, the popular podcast that premiered in 2016. This book is a combination of practical wisdom, true crime tales, and personal stories from the podcast’s comedic hosts. Reviewers say it’s “poignant” and “worth every penny.”

Buy it: Amazon

9. I Like to Party Mug; $12

LookHUMAN/Amazon

This cheeky coffee mug says it all. Plus, it’s both dishwasher- and microwave-safe, making it a sturdy gift for the true crime lover in your life.

Buy it: Amazon

10. Latent Fingerprint Kit; $60

Crime Scene Store/Amazon

Try your hand (get it?!) at being an amateur detective with this kit that lets you collect fingerprints left on most surfaces. It may not be glamorous, but it could help you solve the mystery of who put that practically empty carton back in the refrigerator when it barely contained enough milk for a cup of coffee.

Buy it: Amazon

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Connect Your Nintendo Switch Audio to Wireless Headphones With This Bluetooth Adapter

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StackCommerce

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One of the top gifts this holiday season is the Nintendo Switch ($300), and playing it with others is one of the safest ways to connect this year. You can make game time even more social with this Bluetooth adapter that can connect your Switch, smartphone, and wireless headphones simultaneously. That means you can listen to music, Switch audio, and even chat while you play. And through December 5, you can get it for just $36.54 with the code DEC15 at checkout.

The adapter works with a simple two-button design that houses the latest Bluetooth 5.0 technology and an advanced DSP algorithm to combine audio from your Switch and smartphone to stream wirelessly to your headphones or speakers.

The product earned itself a 4.7-star rating on Amazon, with reviewers saying, “The HomeSpot Bluetooth Adapter Pro is a must-have accessory for the Nintendo Switch” and, “I just ordered air pods for traveling and now I can listen to my Switch and/or whatever music or podcast I want all at the same time!”

The HomeSpot Bluetooth Audio Adapter Pro has five intuitive indicators that show operation at a glance. All of that functionality is housed in a pretty low-profile design that fits seamlessly with the Nintendo Switch and Nintendo Lite. The set comes with one adapter, one USB-C to USB-A converter, and a pouch for storage.

For a limited time, the HomeSpot Bluetooth Audio Adapter Pro is 14 percent off at a final price of $43. It's the perfect gift to keep your pals connected after a year of Zoom fatigue.

Prices subject to change.

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