If you’ve ever used a computer, you’ve probably seen it: A grid of numbers and mathematical operators on the far-right side of a keyboard. It’s a numeric keypad—but how did it get there, and why is it laid out the way it is? Let’s explore its origins. It’s All About the Math Computers have numeric keypads because they make repetitive data entry easier. They allow you to type numbers and perform mathematical operations rapidly, with only one hand. The modern design of numeric keypads may seem obvious today, but it is the product of decades of refinement in adding machine technology, most of which took place over 100 years ago. The modern numeric keypad layout—sometimes called a “tenkey” layout—can trace its roots back to David Sundstrand, whose company released the first commercial tenkey mechanical adding machine in 1914. In Sundstrand’s adding machine key layout, you can see the rudiments of now-standard setup: ten numeral keys, arranged in three rows of three with the … [Read more...] about Where Did the Numeric Keypads on PC Keyboards Come From?
Signal is a secure messaging app that takes your privacy very seriously. By default, messages only go to your phone, but you can add other devices that will receive copies, letting you chat from your computers and tablets. Here’s how to manage the devices that can access your Signal account. How to See Your Linked Devices Signal uses your phone number to identify who you are, which means you have to sign up and log in using your smartphone to use the service. Once you have done this, you can link other devices, like an iPad or a computer running macOS, Windows, or Linux. You can only use one “mobile device” with Signal at a time, but you can link up to five other devices, like tablets or laptops. This means you can only have one primary iPhone or Android smartphone linked to your account at any time. You’ll need to re-register Signal if you want to switch from Android to iPhone or vice versa. To see existing linked devices, or to add more, open Signal on your primary … [Read more...] about How to See and Manage Linked Devices in Signal
Telegram and Signal are widely popular privacy-focused messaging apps. However, the two apps have some big differences : While all messages sent via Signal are always end-to-end encrypted by default, Telegram messages aren’t. End-to-end encryption is an optional feature in Telegram. Why End-to-End Encryption Matters End-to-end encryption means that only the sender and the receiver of a message can see its contents. Not even the company running the server in the middle of the conversations can see the contents of the communications. With Signal, all conversations are always end-to-end encrypted: The Signal Foundation can’t see the contents of the messages. With Telegram, the company in charge of Telegram is technically capable of seeing the contents of the messages on its servers. There is still some encryption in Telegram, of course: Encryption is used to transmit messages between your Telegram app, Telegram’s servers, and the other person’s Telegram app. Your … [Read more...] about PSA: Telegram Chats Aren’t End-to-End Encrypted by Default
Unlike Signal, Telegram chats aren’t end-to-end encrypted. You only get server-side encryption by default. But if you want full encryption, you need to enter a separate Secret Chat mode. Here’s how to start an encrypted Secret Chat in Telegram. What Is Secret Chat in Telegram? When it comes to security and privacy, Telegram is much better than popular messaging apps like WhatsApp and Facebook Messenger. Telegram is open-source, and all of its code is available online for verification by security experts. But by default, Telegram only offers server-side encryption. Telegram syncs your data (messages, media, and groups) between all your devices and uploads it to its servers by default. All the data in Telegram’s server is encrypted. This means that you are safe from your internet service provider, Wi-Fi router interception, and other third parties. But Telegram itself might still be able to access your data (if they really wanted to). According to Telegram, its … [Read more...] about How to Start an Encrypted Secret Chat in Telegram
On February 1, 1991, John Romero, John Carmack, Tom Hall, and Adrian Carmack officially founded id Software. The group went on to revolutionize the game industry with franchises such as Wolfenstein , Doom , and Quake . Here’s a look back at id Software over the last 30 years, with a little help from those legendary developers. id Software: The House That Keen Built The story of id Software began in the late 1980s, when John Carmack, John Romero, Adrian Carmack (no relation to John), and Tom Hall developed games for a mail-order disk magazine company called Softdisk , located in Shreveport, Louisiana. After John Carmack devised a breakthrough scrolling technique for PC games in mid-1990, Hall, Romero, and Carmack created a new platform game— Commander Keen —based on the technology while secretly moonlighting at Softdisk. Soon the talented group began communicating with Scott Miller of Apogee Software , a pioneering shareware publisher. After some … [Read more...] about From Keen to Doom: id Software’s Founders Talk 30 Years of Gaming History