Long-exposure photo of laser beams with a twisted wavefront. The beams have holes in the middle due to destructive interference at the center of the twists. Researchers at the Institute of Quantum Optics and
If the universe allows ‘open timelike curves’, particles travelling back in time along them could help to perform currently intractable computations. Even though such curves don’t allow for interaction with anything in the past,
On the left, users first access mailboxes. Then, the server disconnects users from the mailboxes and adds cover traffic. An adversary cannot tell who is talking to whom by looking at mailbox access patterns.
The Samsung Galaxy S7 is the worst kept secret in the mobile world. A flood of rumors has been flowing in, and now, new images reportedly show the long-rumored device and its components. GSM
Why send a message back in time, but lock it so that no one can ever read the contents? Because it may be the key to solving currently intractable problems. That’s the claim of
They’re the latest rage in jewelry and gadgetry, but like all computer devices, smart watches are vulnerable to hackers, say researchers at the University of Illinois at Urbana-Champaign. Using a homegrown app on a
From large-scale data breaches such as the 2013 Target case to local schemes that use skimming devices to steal data at the gas pump, credit card fraud is becoming commonplace. The key challenge is
Researchers at the National Institute of Standards and Technology (NIST) have “teleported” or transferred quantum information carried in light particles over 100 kilometers (km) of optical fiber, four times farther than the previous record.
Think of how often sit with your phone, tablet, or computer, quietly shopping or reading the latest headlines. Browsing the internet certainly feels like a solitary activity, but as a new study in theInternational