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How To: Understanding Signature Schemes: How Data Sources Are Authenticated, Secured, & Spoofed

One of the biggest problems in data security is authentication of data and its source. How can Alice be certain that the executable in her inbox is from the venerable Bob, and not from the not-so-venerable Oscar? Clearly Alice wants to know because if this file is actually sent to her by Oscar, the file might not be a game, but a trojan that can do anything on her computer such as sift through her email and passwords, upload her honeymoon pictures, or even turn on microphones and webcams. Thi...

How To: Solve a Rubik's Cube in 90 seconds

Learn how to solve a Rubik's cube in ninety seconds in this video. You'll learn that there are couple of common methods used to solve the cube. The Petrus method which starts with the corner and the Friedrich method which starts at the bottom and moves up. The presenter shows how he uses several methods and algorithms to create seven steps to a solved cube. The first step is to make a cross on the bottom layer. The second step is to correctly place the bottom corner pieces. The third step is ...

How To: Encrypt files with OpenSSL in Debian Linux

This video shows how to encrypt files with OpenSSL in Debian Linux. First we check if open SSL is installed on the system. If not, install it using packet manager. Next create the file going to be encrypted. Now encrypt the file. In this case AES algorithm in ypher block chaining mode is used. AES is US-government standard and can be considered secure. Now we are prompted for a password. In order for the encryption to be secure, we need to choose a strong password. Now we can delete the origi...

How To: Simply solve the Rubik's Cube

Want to solve the Rubik's Cube? Well, watch this how to video to know all about solving the troublesome Rubik's Cube. This three-part tutorial will go through seven steps to mastering the Cube. You'll need to lubricate the Cube first, with silicon spray, so it's lubed up nicely, for maximum speed. Then, start the steps.

How To: Explore and decipher fractal geometry and self-similar mathematics

There wouldn't be any chaos in the world without Benoit Mandelbort— chaos theory, that is. Mandelbrot, who just passed away at the age of 85, pioneered fractal geometry and greatly influenced chaos theory. He spent most of his life working in physics, biology and astronomy, and is best known for his Mandelbrot Set, a mathematical set of points in the complex plane (the boundary of which forms a fractal).

News: Indian 'Driverless' Startups Like Swaayatt Are Daring to Navigate the World's Most Dangerous Roads

In Bhopal, India, a place nestled in between the royally pink city of Jaipur and the dry (i.e., alcohol forbidden) state of Gujarat, is a team of developers determined to make a fully driverless car suitable to the complexities of Indian traffic. An algorithm elaborate enough has yet to be made by any other company, but is the fundamental key to handling the intuitive habits of Indian drivers, the often intense and gridlocked traffic, and the country's vast expanse of jarring roads.

How To: Turn Your Favorite Pics into Photo Mosaics on Your Nexus 7

Photo mosaics have interested me since I was a kid. I could never understand how someone took the time and effort to make one large masterpiece out of hundreds of smaller images. Maybe I'm too daft to grasp the concept, but it seems extremely difficult. I certainly don't have the necessary skills to make my own work of art, but luckily my Nexus 7 does.

How To: Solve the Rubik's Cube blindfolded

Need a new way to impress your friends and family? Watch this video tutorial to learn how to solve the Rubik's Cube blindfolded. To solve the Rubiks Cube blindly, use the Pochmann Method. You really need to practice this method to get it down, because there are many things to keep in mind.

How To: Act and be like a Scene girl

So you're into Emo music and are looking to dress the part? Look no further! EmoWorldTV shows you a few simple steps to make yourself totally Scene. Scene girls are unique, cute and always check their MySpace pages. So, get out your makeup, your digital camera and some scissors and start styling yourself Scene.

Coming Soon: Shadow Ban Haters & Bullies on Your Instagram Posts

In general, the internet can be a cruel place, and Instagram is no exception. Most of the time, the platform is a fantastic way to share and view unique and creative content, to reach an audience of both fans and friends. People can step out of line and harass or bully others on posts to the detriment of the entire community. However, this type of commenting won't be sustainable for much longer.

How To: Get Bokeh on Any Phone with Facebook Messenger's Portrait Selfies

Portrait mode works with any dual-lens iPhone, as well as the single-lens iPhone XR, and lets you take impressive portraits with blurry, bokeh-filled backgrounds. Portrait selfies, on the other hand, are only available devices with Face ID. But that's only for Apple's Camera app itself — third-party apps like Messenger have "portrait" selfies for any iPhone — as well as any Android phone model.