>
How a 27-Year-Old Codebreaker Busted the Myth of Bitcoin's Anonymity
Old World Order is COLLAPSING: The Death of Europe and the Rise of China
Energy Secretary Expects Fusion to Power the World in 8-15 Years
South Koreans Feel Betrayed Over Immigration Raid, Now Comes the Blowback
Tesla Megapack Keynote LIVE - TESLA is Making Transformers !!
Methylene chloride (CH2Cl?) and acetone (C?H?O) create a powerful paint remover...
Engineer Builds His Own X-Ray After Hospital Charges Him $69K
Researchers create 2D nanomaterials with up to nine metals for extreme conditions
The Evolution of Electric Motors: From Bulky to Lightweight, Efficient Powerhouses
3D-Printing 'Glue Gun' Can Repair Bone Fractures During Surgery Filling-in the Gaps Around..
Kevlar-like EV battery material dissolves after use to recycle itself
Laser connects plane and satellite in breakthrough air-to-space link
Lucid Motors' World-Leading Electric Powertrain Breakdown with Emad Dlala and Eric Bach
Murder, UFOs & Antigravity Tech -- What's Really Happening at Huntsville, Alabama's Space Po
Two basic types of encryption schemes are used on the internet today. One, known as symmetric-key cryptography, follows the same pattern that people have been using to send secret messages for thousands of years. If Alice wants to send Bob a secret message, they start by getting together somewhere they can't be overheard and agree on a secret key; later, when they are separated, they can use this key to send messages that Eve the eavesdropper can't understand even if she overhears them. This is the sort of encryption used when you set up an online account with your neighborhood bank; you and your bank already know private information about each other, and use that information to set up a secret password to protect your messages.
The second scheme is called public-key cryptography, and it was invented only in the 1970s. As the name suggests, these are systems where Alice and Bob agree on their key, or part of it, by exchanging only public information.