How to Hide Files Behind an Image

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1. First select an image beneath which you will hide the file you want.
2. Now select the file you wish to hide and convert into .RAR formattd file using winRAR.
3. Paste both of these files on the desktop.
4.Now press windows key + ‘R’ and then enter cmd.
cd desktop
5. CD stands for change directory.By typing the above mentioned command you redirect the directory to desktop.
Copy /b name.jpg + filename.rar image.jpg
  • Replace name.jpg with the name of image you want your file to be hidden behind. Don’t forget to add image format like  .jpg,.png,.gif etc.
  • Replace filename with the file of your choose that you choose to hide. It must be in .rar format.
  • Finally Replace image.jpg with the name of the final image with files inside.

6. The newly created image just looks like an image from all sides. You need to follow the following steps to extract files from images.

 Accessing the Hidden File ?

To extract the file out of the image, you should open the image in winrar, which can be done in either of these ways.

    1. Open winrar

    2. Now locate your image and open it or simply drag your image in winrar.

    3. Extract the file and done.
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Antivirus vs Anti-malware

Antivirus vs Anti-malware

 

What are the differences between “viruses” and “malware”?

Viruses are a particular type of malware (designed to spread), while malware is a general term used to represent all sorts of unwanted or malicious code. Malware can contain viruses, spyware, adware, Trojans, worms, and more. However, because viruses made headlines a few years ago, most Internet security companies sharpened their marketing on them, which is why they’re named “Antivirus.”

There is no one tool can catch everything, which is why security specialists recommend a layered approach. It’s better to have more than one set of eyes looking at threats from separate angles. Do your research and check out the latest reports on the effectiveness of the various software’s out there because they are changing all the time.

In the end, good browsing practices and general knowledge should be your first line of defense against viruses, malware, and spyware. But, we recommend running a good Antivirus in the background with a malware tool at the same time to cover everything else. This way you’re always protected, and you can scan your system for malware or viruses whenever you want to.

Metallic hydrogen has been created for the first time

More than 80 years after it was first predicted, physicists have created metallic hydrogen – a mysterious form of hydrogen that could be capable of superconducting electricity without resistance at room temperature.

Scientists have long suspected that hydrogen could exist as a metal in certain parts of the Universe, but this is the first time metallic hydrogen has ever been created on Earth, and the material is even stranger and more fascinating than scientists imagined.

“This is the holy grail of high-pressure physics,”says lead researcher Isacc F. Silvera from Harvard University. “It’s the first-ever sample of metallic hydrogen on Earth, so when you’re looking at it, you’re looking at something that’s never existed before.”

The periodic table can be broadly be split up into two categories – metals and non-metals. Among many other properties, metals are lustrous (shiny), good conductors, and usually solid at room temperature, while non-metals have a dull appearance, and are poor conductors.

As most of us learnt at high school, hydrogen – the first element on the periodic table – is a non-metal.

But back in 1935, researchers predicted that under certain conditions, this common and oft-studied element could have its atoms bind together so tightly, the material wouldn’t just take on metallic properties, it could actually become a metal.

But those conditions aren’t easy to achieve – they involved achieving incredibly high pressures at extremely low temperatures, which is why for more than 80 years, and despite numerous attempts, no one had been able to prove it was possible, until now.

“The most exciting part is we pressurised hydrogen gas to sufficiently high pressures and we saw it convert into a metal,” Silvera told ScienceAlert.

Silvera has been trying to create metallic hydrogen for 45 years.

“The hydrogen went from being transparent, to non-transparent and black, and suddenly it became lustrous,” he explained. “We could actually see it become a metal.”

You can see this material, for the first time ever on planet Earth, below:

Screen Shot 2017-01-25 at 8.10.53 pmSilvera et al

This isn’t just exciting as a proof-of-concept in the physics world – although it’s definitely that. Metallic hydrogen has been the source of so much speculation over the years because it’s predicted to have some incredible properties.

Most importantly, physicists think that metallic hydrogen could be a room-temperature superconductor, which would mean the material could conduct electricity with zero resistance – and without having to be cooled to crazy temperatures first.

We know of many superconducting materials already – we use them to create the powerful magnetic fields in our MRI machines and in maglev trains – but they’re only capable of achieving superconductivity at temperatures below –269 degrees Celsius (–452.2 degrees Fahrenheit), which makes them expensive and non-practical for many purposes.

If scientists could achieve that same superconductivity at room temperature, it would be huge, because it means we could create things like power lines that don’t lose any electricity between the power plant and your home. Right now, the grid loses as much as 15 percent of its energy as heat, due to resistance.

The material could also be the most powerful rocket propellant ever discovered, with incredible energy stored up in its bonds capable of blasting us to distant worlds.

To be clear, the metallic hydrogen that Silvera and his team have created is only around 1 to 1.5 microns thick, and 10 microns in diameter, so it’s tiny.

And until peer-review had confirmed that their sample was the real deal, they were hesitant to perform too many tests on it, so we have no evidence so far to suggest that the material is a superconductor. That’s something that will be investigated in the months to come.

But for now, we know the sample is real, and it’s been stable in Silvera’s lab since October.

Researchers have claimed that they’ve made the early stages of metallic hydrogen in the past – and even claimed evidence of metallic hydrogen itself. But these reports have never been verified. This latest claim will now have its chance to have holes poked in it by critics, but so far the sample has withstood all relevant metallic testing.

To create the sample, the team trapped hydrogen gas inside a tiny diamond casket, chilled it to 5.5 Kelvin (–267.65 degrees Celsius and –449.77 degrees Fahrenheit) and put it under incredibly high pressure.

dias1HRSilver et al

And when we say high pressure, we mean high pressure. Back in 1935, it was predicted that metallic hydrogen would emerge at 25 gigapascals (GPa) of pressure. But Silvera and his team finally achieved it at pressures between 465 and 495 GPa – nearly 20 times higher than initially predicted.

For perspective, 1 GPa equals 1 million kilopascals (KPa), and the average pressure at sea level on Earth is 101.325 KPa.

The team quickly saw its appearance change, but to verify that what they’d created was metallic hydrogen, they used spectroscopic measurements, including measuring its reflectivity, and showed that what was originally a standard hydrogen gas (H2) had transformed into an atomic metal.

You can see the different atomic structure below:

dias2HRSilver et al

Now that we know metallic hydrogen exists, there are many questions left to be answered. The biggest of these is whether or not metallic hydrogen is a liquid or a solid – as researchers have predicted it could be both.

So far, Silvera and his team believe that what they’ve created is a solid, but they’ll be performing more detailed analyses of the material now that it’s been verified (something they weren’t willing to risk before in case they inadvertently destroyed the fragile sample).

They’ll also be hooking the metal up with current to test whether it really is a superconductor at room temperature – something that’s possible whether it’s a liquid or solid.

“It’s going to be challenging but we’re going to try,” says Silvera.

Oddly enough, Silvera says that it’s also likely that metallic hydrogen could be metastable – which means that even if you release the pressure it will remain metallic.

A common example of a metastable material is diamond, which is a metastable form of carbon. To make diamond, you put graphite under incredible pressure and heat – something that happens naturally deep below Earth’s surface.

But even when you dig diamonds up out of the ground, they remain diamonds.

The same might be true with metallic hydrogen, and this is something that will also be tested once all other analysis has been performed on the sample, just in case the predictions are wrong, and the material disperses back into a gas when the pressure is lifted.

“We’re going to work on this sample for a while, and then we’ll release the pressure and see if the sample persists as metallic hydrogen,” says Silvera. “And then we’re going to load another sample.”

There are exciting times ahead, and many more discoveries to be made. But today we just proved that the most common of all the Universe’s elements can exist in an entirely new form, and that’s cause enough for us to celebrate.

BlackNurse Attack: An Easy Way To Kill Large Servers With 1 Single Laptop

blacknurse-attack

Back in the 1990s, people were able to crush another person’s dial-up internet connection by simply using a few ping commands. A similar type of denial of service attack is back to cripple modern day firewalls and take down large servers. Named BlackNurce, this attack mechanism is based on a low-volume (ICMP)-based attack on vulnerable firewalls, targeting the ones made by Cisco, Zyxel, SonicWall and others. For those who don’t know, ICMP is the protocol used by the routers and network devices to send/receive error messages.

Researchers from Denmark’s TDC Security Operations Center have recently discovered this simple attack that uses limited resources. They found that even the attacks with low traffic speed and packets per second, commonly called a ‘ping flood attack’, were able to cease the operations of their customers.

The BlackNurse attack uses Type 3 ICMP packets with a code of 3. After achieving a threshold of 15-18 Mbps, the target firewalls drop massive packets and the server behind the device becomes unable to talk to the internet.

In the tests, the researchers found out that only a single modest laptop was enough to deliver 180 Mbps BlackNurse volumes. “It does not matter if you have a 1 Gbit/s Internet connection. The impact we see on different firewalls is typically high CPU loads,” the researchers state.

Palo Alto Networks has issued its advisory and called its devices vulnerable only in very specific scenarios that contravene best practices. On the other hand, Cisco has refused to consider it a security threat.

Microsoft Wanted to Buy Facebook for $24 billion but Zuckerberg Said No

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Microsoft spent $26.2 billion to take over LinkedIn, and if you think the software giant is spending too much money, here’s something that could make you change your mind.

Redmond was ready to pay almost as much money on taking over Facebook a long time ago when the social network wasn’t really this popular, but according to recent reports, it was Mark Zuckerberg who refused the deal.

Former Microsoft CEO Steve Ballmer revealed in an interview with CNBC on Friday that his company was interested in buying Facebook when it was “itsy-bitsy” and the amount of money it would have paid reached $24 billion. Zuckerberg refused, though, and considering where Facebook is right now, he clearly made the right decision.

“Oh I think $24 billion when the company was itsy-bitsy and he said no. And I respect that,” Ballmer, who is now the owner of the Los Angeles Clippers, revealed.

We are not interested to buy Twitter

Ballmer’s statements come in line with previous revelations made by David Kirkpatrick in his 2010 book called “The Facebook Effect.”

“Microsoft [would] acquire a small stake in Facebook at a $15 billion valuation. Then, Microsoft would have the option, every six months, to buy another 5 percent of Facebook. A complete takeover of the company would take 5 to 7 years,” he said.

Ballmer also revealed that he “never wanted to buy Twitter,” explaining that although this service cannot be replaced by any other substitute right now, there was no interest in it.

Why Is Localhost’s IP Address 127.0.0.1? What Is Its Meaning?

localhost-127-0-0-1

 

You might have definitely heard of 127.0.0.1. You also might be knowing that 127.0.0.1 points to localhost. But, why is localhost‘s IP address 127.0.0.1–why not something else?

Before trying to answer that question, let me tell you a little bit about how does it work. This address is used to establish a connection to the same computer used by the end-user. When we deal with IPv6 address, it’s defined using the connotation of ::1. As IPv6 addresses take over, localhost will be more commonly know as 0:0:0:0:0:0:0:1.

How does 127.0.0.1 work? Why is it called so?

Very often developers use 127.0.0.1 to test their applications. When you try to establish a network connection to the 127.0.0.1 loopback address, it works in the same manner as making a connection with any remote device. However, it avoids connection to the local network interface hardware.

But, why does the localhost IP address starts with 127? Well, 127 is the last network number in a class A network. It has a subnet mask of 255.0.0.0. So, the first assignable address in the subnet is 127.0.0.1.

However, if you use any other numbers from the host portions, it should work fine and revert to 127.0.0.1. So, you can ping 127.1.0.1 if you like.

You might also ask why the last network number was chosen to implement this. Well, the earliest mention of 127 as loopback dates back to November 1986 REF 990. And, by 1981, 0 and 127 were the only reserved Class A networks.

The class A network number 127 is assigned the “loopback” function, that is, a datagram sent by a higher level protocol to a network 127 address should loop back inside the host. No datagram “sent” to a network 127 address should ever appear on any network anywhere.

As 0 was used for pointing to a specific host, 127 was left for loopback. Some would also call it more sensible to choose 1.0.0.0 for loopback, but that was already given to BBC Packet Radio Network.

Source: SuperUser

 

 

 

Google Announces Pixel And Pixel XL Smartphones

google-pixel-phone-1-1

 

After a series of leaks and speculations, Google took to the stage and revealed Pixel smartphone at its biggest hardware event in years. The phone looks just like the leaks suggested and resembles Apple’s iPhone–only without a physical button at the bottom.

Google Pixel and Pixel XL specifications and features

Google revealed two models of its new flagship smartphone — Pixel and Pixel XL. Pixel comes in the standard 5-inch size, while Pixel XL features a 5.5-inch XL screen. Both of these AMOLED screens are protected by Gorilla Glass 4.

Pixel is powered by Snapdragon 821 processor clocked at 2.15 GHz, 4GB RAM, and comes with 32/128GB storage space. It packs a 2,770mAh battery.

For taking pictures, you get a 12-megapixel rear sensor with a f/2.0 aperture. According to DxOMark tests, Pixel’s camera is the highest-rated smartphone camera ever created. It comes with features like Smart Burst and HDR Plus. For shooting selfies, there’s an 8-megapixel front camera.

 

Pixel XL, the bigger brother, comes with 5.5 Quad HD display and a bigger 3,450mAh battery. The other specifications remain the same.

Google Pixel is also the first smartphone to feature Google Assistant, which recently showed its tricks in the Allo messaging App. It can respond to your queries and return useful information or replies. Pixel is also the first Daydream-compatible device that works with the $79 Daydream View headset.

 

Google Pixel and Pixel XL price and availability

Google Pixel 32GB model will be available at a price of $649. It’s available for preorder in the US, Australia, Canada, UK, and Germany. The Indian users can order it on October 13.

You’ll have to spend $749 for Pixel with 128GB of onboard storage, $769 for Pixel XL with 32GB storage, and $869 for XL with 128GB space.

 

This sensor will let you ‘see’ through walls like Superman

walabot-diy

Vayyar Imaging, a 3D-imaging sensor company based in Israel has developed a new 3D-imaging sensor for Android smartphones that allows your device to peer right through walls revealing everything from structural foundations to pipes, to wiring, and even unwanted pests hiding between rooms.

Called the Walabot DIY, all you need to do is just download the Walabot DIY app from the Google Play Store, connect the accessory to your smartphone’s USB port, and hold it against a wall. Since, it is a consumer-friendly product; it doesn’t require any training to use.

The sensor can also magnetically attach to the back of your smartphone, which allows you to use the two devices single-handedly, leaving your other hand free to operate the app. This gives you a more visual representation of what’s discovered, its placement, what it’s made from, and its distance. Walabot DIY says it can see up to four inches deep into walls made of drywall or even cement.

“Walabot instantly turns a smartphone into a powerful 3D-imaging system at your fingertips,” company officials said.

“Our advanced technology lets people see all kinds of things hidden in the world around them, adding yet another dimension to the way people use smart devices today,” they said.

While the Walabot DIY is more expensive than Walabot Maker version, it could prove the usefulness of Vayyar’s 3D imaging technology. It also gives makers and inventors around the world the opportunity to develop content that takes advantage of the 3D imaging sensor technology. One can not only make use of the existing apps, but can also create their own apps.

“Walabot’s technology is simple and intuitive, so people with any level of experience can use it to enjoy and better the world around them,” the company said.

“Walabot makes highly sophisticated imaging technology approachable, affordable and usable for everyone,” said Raviv Melamed, CEO and co-founder of Vayyar Imaging, a 3D-imaging sensor company based in Israel.

The Walabot DIY uses sophisticated algorithms to detect the radio emissions and reflections of different objects. It studies the data to figure out in real-time what kind of object is hiding behind a typical wall. You can use it to see through tables as well, but not metal objects and other types of barricades.

“It can help the blind avoid obstacles, sense — and alert you — if your mother or father has fallen in the shower, help your robot become autonomous, and much more,” Melamed said.

“The idea is to take the guesswork out of remodeling,” said Melamed, in an interview with VentureBeat. “You don’t want someone punching a hole in your sewer pipes by accident. It’s like real Superman vision.”

According to Melamed, Vayyar’s devices can tell you a lot more about what’s behind a wall. In a demonstration shown to VentureBeat, one can see what’s behind the wall on the screen of the smartphone by just pairing it with the Android smartphone and activating the app. The data is presented in a raw form or an analysis of that data as calculated by Vayyar.

As there are some interruptions in displaying what is behind a piece of a wall, you have to move it over the wall slowly. However, you can get a 3D image of an entire room’s walls in just few minutes. Melamed said it will make it a lot simpler to locate a leak in a pipe, or just drill into a wall without the fear of hitting a pipe or electrical wire, hang pictures in a gallery, or mount shelves.

“We can get it to 5 millimeters accuracy,” Melamed said. “You’ll know what’s inside a wall in a few minutes.”

Besides the above, Walabot DIY is also considered ideal for the construction worker, home renovator, and DIY enthusiast. Walabot DIY is compatible with all Android smartphones 5.0 and higher and comes with USB OTG. After the Walabot DIY app is downloaded via Google Play and completes a short standardization process, it can be used to scan the wall. Images of the wall are then placed on the screen of the smartphone.

Walabot DIY also features a flexible sensitivity setting for optimal standardizations on particular renovation and construction projects. This offers two sensing modes and can effortlessly snap photo screenshots for use in offline analysis.

Melamed also demonstrated how Walabot DIY can identify the pattern of your breathing. In other words, it has applications for examining your sleep patterns and other uses in health, safety, and quality of life. While the technology is still in its initial stages, it could shoot more demand for augmented reality applications, he said.

 

What Exactly Is Quantum Computing?

quantum-internett-

For past few months, you must be noticing your news feed is flooded with major breakthroughs and headways in the tech arena. The technology feed could range anything from the recent surge in international cyber intrusions or simple hacking tutorials to space expeditions, defying Moore’s law or the developments in Artificial Intelligrnce. But, what seems to excite most of the tech enthusiasts is the intricate quantum computing and its prospects in future.

The Chinese have announced to set up the world’s first ever and largest hack proof quantum computing communications network from Beijing to Shanghai. Let’s see what these computers actually are and why quantum computing is important for our future!

What is a Quantum Computer?

Quantum computers are nothing like the regular computers or even supercomputers. While the top super computers use extensive parallelism with numerous processing units to get its super speed, the Quantum computers work with the physics of quantum mechanics at its core.

A quantum computer is built atom by atom. Now, quantum mechanics in itself is one of the most dreaded topics in physics, so it is no surprise that the quantum computer bears the same traits as well.

How Does Quantum Computing Work?

The quantum computers use atoms (quanta) as its physical system. Unlike in regular computing where the information is carried in either 0 or 1 bit, the quantum mechanics allows an atom to be in both 0 and 1 state simultaneously. This bit of data is called a qubit. ( Don’t hold your head just yet!)

So, as per the theory, if there are equal number of qubits and the regular bits, then the qubits will hold twice the information, i.e. if there are n qubits in the supercomputer, then it will have 2^n different states. So experimentally, it can hold more information as compared to regular digital bits thereby increasing the speed of the system exponentially.

In theory, the quantum phenomenon seems mind blowing but actually building one is equally painstaking. The qubits are dynamic and are only the probabilistic superposition of all of their states. So, the accurate measurement is difficult and requires complex algorithms such as Shor’s algorithm.

What are the Challenges To Quantum Computing?

One of the biggest challenges is to remove quantum decoherence. Decoherence in a layman’s language could be understood as the loss of information to the environment. The decoherence of the qubits occurs when the system interacts with the surrounding in a thermodynamically irreversible manner.

So, the system needs to be carefully isolated. Freezing the qubits is one of the ways to prevent decoherence.

Past And Present Of Quantum Computing:

The concept of Quantum computing was laid down in the 1980s, but major progress started only two decades later. In 2001, researchers demonstrated Shor’s algorithm to factor 15 using a 7-qubit NMR computer. After that, developments in the field of quantum computing operating system and expansion in the qubit numbers were focussed.

As of today, many private players have entered into the competition to build a quantum computer, that would actually silence the critics. D-Wave has recently claimed to break the 1000 qubits barrier record. Other tech giants such as Google and IBM are advancing to develop their own quantum computers as well.

If It’s So Complex, Why Is Everyone After Quantum Computing?

A fully functional quantum computer would require around a million atoms. And right now, we are at a mere thousand. But, what would happen if we reach that limit or even its half?

The complex and massive calculations for example in genome sequencing or tracking weather patterns require huge computers or supercomputers for that matter. Now with the current technology, if the amount of data that a supercomputer can handle is increased by just one digit, the system would fail and you would require an even bigger supercomputer.

Second, the modern day encryption systems are entirely based on the limitations of the regular computers. The normal computers can’t figure out the huge probabilistic analysis required to decrypt any sophisticated code. Even a supercomputer would take years decrypting the RSA cryptography, whereas with the help of Quantum computing it would be a matter of days, if not hours.

Quantum computers will lead to research that are either considered hypothetical or at a standstill. From simulating and computing the molecular scale structures to stretching far into the mysteries of Universe, we cannot even dream of the possibilities.

Quantum computing won’t be of changing your lives in day to day operations, but a quantum communication network would definitely provide a better and secure network.

Linux Mint 18 ‘Sarah’ Xfce Edition Released — Download Now

linux-mint-18-xfce

 

Back in June, this summer’s most anticipated Linux release, Linux Mint 18, was relesed. Often called the best Linux distribution for desktop users, the operating system came loaded with ton of new features. A large number of Linux users have already downloaded and used Cinnamon and MATE flavors.

Just like the other flavors of Linux Mint 18, Xfce version is a Long Term Support release and it’ll continue receiving updates and fixes for five years. So, if you like this lightweight desktop environment, leave all the worries behind and grab Linux Mint 18 Xfce edition.

New features in Linux Mint 18 Xfce edition:

Linux Mint 18 Xfce comes with Linux kernel 4.4, Xfce 4.12,Ubuntu 16.0 LTE package base, and MDM 2.0.

Just like Linux Mint’s MATE and Cinnamon flavors, the Xfce version also comes with X-apps. It’s a new project that has been started to produce dedicated apps for GTK desktop environments. These applications include Xed, Xviewer, Xplayer, Pix, and Xreader.

Linux Mint 18 Xfce edition also comes with a new Mint-Y theme based on beautiful Moka icons and popular Arc theme. Mint-Y theme comes in three different variants — Light, Dark, and Darker.

Mint 18 Xfce edition comes with largely improved HiDPI support. In this release, all the X-apps, Firefox, and most of the Mint apps have been shifted to GTK3.