In this lesson we will learn about one of the most important concepts in algebra SQUARE ROOTS. The square root of a number m is another number n that satisfies the following formula: m = n x n. You can also say that m is the square of n. The opposite of squaring a number is finding its square root. You can use the radical symbol to indicate that the square root of m is n:
Although it is not the easiest language to learn to write there are a few pieces of advice that can help you along your way of learning to write in Chinese. Our expert, Bo Feng, will show you both the contemporary way of writing numbers to ten and then an easier, condensed way to do the same thing. He will walk you step by step through each number and explain each line and dot.
Make sure your next apartment rental goes smoothly by properly checking the property before signing a contract. This way you will avoid unexpected disappointments or problems that you were not aware off. Moving is hard enough, give yourself all the advantage you can by going in prepared.
The latest 17.4 update for Safari includes a prompt for EU users to choose a different default web browser available in their region. It also gives us new ways to customize the Favorites Bar on an iPad. And Apple Cash virtual numbers are now supported as an AutoFill suggestion. But there are also some hidden changes in Safari 17.4 for iOS and iPadOS that you might not ever notice unless you keep reading.
Facebook Reality Labs just experienced its first major executive exit since the pandemic began. Hugo Barra has announced that he's stepping down from his position as vice president of VR at Facebook.
If you do a lot of typing every day — writing reports, essays, emails, and whatnot — we can guarantee your day would be improved by taking less time to do it. Thankfully, we've found a super-smart AI-powered tool that will do just that, and right now, you can get an amazing 52% off a Lightkey Pro Text Prediction Software: Lifetime Subscription for the sale price of just $79.99 (regular price $169).
Mobile privacy is one of the most pressing security issues in existence. Since we carry our phones with us everywhere we go, we need to ensure that we're safe from prying eyes.
Life is too chaotic to be organized all the time, but little steps in the right direction make things easier overall. File folders keep paperwork from spiraling out of control. Spice jars take the clutter out of cabinets. Storage totes keep basements neat and tidy. But to find what you're looking for faster, you need a label maker.
UnrealIRCd is an open-source IRC server that has been around since 1999 and is perhaps the most widely used one today. Version 3.2.8.1 was vulnerable to remote code execution due to a backdoor in the software. Today, we will be exploiting the vulnerability with Metasploit, examining the underlying code to understand it, and creating our own version of the exploit in Python.
With EA chief executive Andrew Wilson stating the official mobile version of Apex Legends won't arrive until the 2021 fiscal year, fans have to wait at least another year to enjoy their favorite battle royale game on the go. But for those who can't wait, there are ways to play the game on iPhone and Android right now.
While MacOS computers have been spared from some of the most famous malware attacks, there is no shortage of malicious programs written for them. To keep your computer safe from some of the most common types of malware, we'll check out two free tools. These tools can automatically detect ransomware encrypting your files and watch for unauthorized access to your microphone and camera.
We're basically living in the future, so let's work like we are. For decades, we have, without question, opened a word processor like Pages, and clicked or tapped our way to starting a new document. What's wrong with that? It's unnecessary. We all have a digital assistant living in our iPhone, one that can start up a new Pages doc by verbal request.
One of the most common web application vulnerabilities is LFI, which allows unauthorized access to sensitive files on the server. Such a common weakness is often safeguarded against, and low-hanging fruit can be defended quite easily. But there are always creative ways to get around these defenses, and we'll be looking at two methods to beat the system and successfully pull off LFI.
For those with small hands, smartphones have gotten out of control as of late. Nearly every flagship phone is over six inches in length, so many are forced to use phones that are too big for them and hope they don't fall. Well, thanks to one developer, using these phones can be a lot easier.
KeePassX, 1Password, and LastPass are effective against keyloggers, phishing, and database breaches, but passwords managers rely on the operating system's clipboard to securely move credentials from the password vault to the web browser. It's within these few seconds that an attacker can dump the clipboard contents and exfiltrate passwords.
A relay is an electrical component that works like a light switch, where it's turned on or off with an electrical signal. By connecting a relay to a Wi-Fi connected microcontroller like an ESP8266, you can build a connected switch that can be controlled from the web browser of any device connected to the same Wi-Fi network — all for just a couple of dollars.
With the number of web applications out there today, it comes as no surprise that there are just as many vulnerabilities waiting for hackers to discover. Finding those vulnerabilities can be a difficult task, but there are plenty of tools available to make the process easier. While it won't help find any zero-days, web scanners such as Uniscan will detect common vulnerabilities.
The last time we heard from Meta, the makers of the Meta 2 augmented reality headset, things looked pretty bleak. Now, as several new facts have come to light, we have confirmation regarding the beleaguered company's fate: Meta is done.
One of the ultimate goals in hacking is the ability to obtain shells in order to run system commands and own a target or network. SQL injection is typically only associated with databases and their data, but it can actually be used as a vector to gain a command shell. As a lesson, we'll be exploiting a simple SQL injection flaw to execute commands and ultimately get a reverse shell on the server.
The Raspberry Pi Zero W and Pi 3 Model B+ include integrated Wi-Fi, Bluetooth Low Energy, and more than enough power to run Kali Linux. They sound like perfect all-in-one penetration testing devices, but the lack of support for monitor mode and packet injection usually meant buying a supported Wi-Fi adapter. Now, it's possible to use monitor mode on the built-in Wi-Fi chip with Nexmon.
Encrypting payloads and encoding stagers are more effective against macOS than one might think. It's very easy to evade VirusTotal and macOS antivirus software using a few simple tricks.
The newest version of macOS has arrived. While everyone's mind is being blown by Mojave's groundbreaking new Dark Mode, we'll be taking advantage of its insecure file permissions to establish a persistent backdoor with a self-destructing payload that leaves little evidence for forensics.
It's not uncommon for hackers to attempt to move laterally between devices in proximity of a compromised device to maintain a prolonged presence in the network. Malware utilizing USB flash sticks to self-replicate and compromise air-gapped machines isn't a new concept.
Database technology has vastly improved the way we handle vast amounts of data, and almost every modern application utilizes it in one way or another. But the widespread use of databases naturally invites a slew of vulnerabilities and attacks to occur. SQL injection has been around for awhile, and as such, there are many defense methods in place to safeguard against these types of attacks.
The conversation of which operating system is most secure, macOS vs. Windows, is an ongoing debate. Most will say macOS is more secure, but I'd like to weigh in by showing how to backdoor a MacBook in less than two minutes and maintain a persistent shell using tools already built into macOS.
While our time with the Protostar VM from Exploit Exercises was lovely, we must move on to bigger things and harder challenges. Exploit Exercises' Fusion VM offers some more challenging binary exploitation levels for us to tackle. The biggest change is that these levels are all network services, which means we'll write our first remote exploits.
A convincing domain name is critical to the success of any phishing attack. With a single Python script, it's possible to find hundreds of available phishing domains and even identify phishing websites deployed by other hackers for purposes such as stealing user credentials.
If you want to follow Null Byte tutorials and try out Kali Linux, the Raspberry Pi is a perfect way to start. In 2018, the Raspberry Pi 3 Model B+ was released featuring a better CPU, Wi-Fi, Bluetooth, and Ethernet built in. Our recommended Kali Pi kit for beginners learning ethical hacking on a budget runs the "Re4son" Kali kernel and includes a compatible wireless network adapter and a USB Rubber Ducky.
Your email inbox is a treasure trove of personal data. The people you contact, your writing style, which messages you flag as spam — all of this information and more can be used to paint a clear picture of you. Google knows this as well as anybody, so they use this data to constantly improve your experience in Gmail.
While everyone was marveling at the latest drama over at Magic Leap involving employees last week, a major rumor listed in one of the reports, related to the company's flagship device, was mostly overlooked.
There are plenty of third-party apps for scanning documents on your iPhone, but they can all be tossed out the door since iOS 11 includes one by default now. Instead of a dedicated app, it's included as part of the Notes app, and it's fairly easy to use. After scanning, you can save it, print it, turn it into a PDF, add markup, and more.
Nmap is possibly the most widely used security scanner of its kind, in part because of its appearances in films such as The Matrix Reloaded and Live Free or Die Hard. Still, most of Nmap's best features are under-appreciated by hackers and pentesters, one of which will improve one's abilities to quickly identify exploits and vulnerabilities when scanning servers.
Recently, I ran across SecGen, a project which allows a user to create random vulnerable machines. I absolutely love vulnerable machines, since a vulnerable VM is a safe and legal way to practice hacking tactics, test out new tools, and exercise your puzzle-solving skills.
Cross-compilation allows you to develop for one platform (like Kali) and compile to run on a different platform (such as Windows). For developers, it means that they can work on their platform of choice and compile their code for their target platform. For hackers, it means we can compile exploit code for Windows from Kali.
Whether your palate runs to domestic or imported, a piece of cheese can be a real treat for the senses. Its smell, taste, and texture are all parts of its appeal. A big part of what makes that savory wonderfulness comes from the microbes in and on the cheese. Thanks to a team of researchers dedicated to studying those microbes, we have a better understanding of their importance to cheese and us.
With iOS 11, Apple's very own Notes app will now come standard with a number of new features that aim to make it significantly more user-friendly and help it compete against more popular notepads like OneNote and Evernote.
The reveal of Apple's new ARKit extensions for iPhones and iPads, while not much of a shock, did bring with it one big surprise. By finding a solution to surface detection without the use of additional external sensors, Apple just took a big step over many — though not all — solutions and platforms currently available for mobile AR.
Keystroke injection attacks are popular because they exploit the trust computers have in human interface devices (HIDs). One of the most popular and easily accessible keystroke injection tools is the USB Rubber Ducky from Hack5, which has a huge range of uses beyond simple HID attacks. The USB Rubber Ducky can be used to attack any unlocked computer in seconds or to automate processes and save time.
The Raspberry Pi is a credit card-sized computer that can crack Wi-Fi, clone key cards, break into laptops, and even clone an existing Wi-Fi network to trick users into connecting to the Pi instead. It can jam Wi-Fi for blocks, track cell phones, listen in on police scanners, broadcast an FM radio signal, and apparently even fly a goddamn missile into a helicopter.
Google is on a mission to bring a better messaging experience to Android users. We've seen them try and fail over the years with various messenger apps, but this time, they're taking a different approach by working with industry leaders to create a new messaging standard. The result is RCS Universal Profile, or simply Chat, and it's finally catching on.
