Telecom

National emergency alerts potentially vulnerable to attack

On October 3, 2018, cell phones across the United States received a text message labeled "Presidential Alert." The message read: "THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed."

Engineering

Show your hands: Smartwatches sense hand activity

We've become accustomed to our smartwatches and smartphones sensing what our bodies are doing, be it walking, driving or sleeping. But what about our hands? It turns out that smartwatches, with a few tweaks, can detect a ...

Security

The age of hacking brings a return to the physical key

With all the news about Yahoo accounts being hacked and other breaches of digital security, it's easy to wonder if there's any real way to keep unauthorized users out of our email and social media accounts.

Consumer & Gadgets

New techniques allow greater control of smartwatches

Smartwatches aren't the easiest things to control, with their small screens and owners' bulky fingers. Georgia Institute of Technology researchers have invented new ways to interact that provide a little more control.

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Text messaging

Text messaging, or texting is a colloquial term referring to the exchange of brief written messages between mobile phones, over cellular networks. While the term most often refers to messages sent using the Short Message Service (SMS), it has been extended to include messages containing image, video, and sound content, such as MMS messages. Individual messages are referred to as "text messages" or "texts".

The most common application of the service is person-to-person messaging, but text messages are also used to interact with automated systems, such as ordering products and services for mobile phones, or participating in contests. Advertisers and service providers use texts to notify mobile phone users about promotions, payment due dates, and other notifications that were previously sent by post or left as voicemail. There are internet services available that allow users to send text messages free of direct charge to the sender.

This text uses material from Wikipedia, licensed under CC BY-SA