Voip

The telecommunications industry has come a long way since Ma Bell opened the first telephone exchange in the late 1800s. With the advent of fiber optics and wireless broadband technology, we no longer have a need for a dedicated phone connection, as today's data networks can c ...more

It's been a long-rumored feature, but today, VoIP calling has finally started rolling out to users of Google's Hangouts service. Essentially integrating Google Voice into the popular messaging platform, Google has given Android (as well as iOS) users an easy way to make calls ...more

Facebook has been revamping its Messenger apps these past few months, trying to lure in more users. Competing in an already crowded market of third-party messaging applications, Facebook Messenger just upped the ante, by introducing voice messaging. Similar to Voxer, the new ...more

Welcome back, my neophyte hackers! I have already done a few tutorials on password cracking, including ones for Linux and Windows, WEP and WPA2, and even online passwords using THC Hydra. Now, I thought it might be worthwhile to begin a series on password cracking in general. ...more

Phone numbers often contain clues to the owner's identity and can bring up a lot of data during an OSINT investigation. Starting with a phone number, we can search through a large number of online databases with only a few clicks to discover information about a phone number. I ...more

When you don't want somebody you're calling to know the real phone number associated with your iPhone, whether it's for privacy reasons, to avoid being called back, or to prevent being ignored, there are multiple things you can do to block it on their caller ID. Some of the b ...more

A burner number isn't just for criminals and cheating spouses. In this digital world, with many of our interactions being conducted online, a throwaway phone number acts as a buffer — it lets you enjoy the web without having to give out your personal information, such as real ...more

Your Nexus 7 may be a tablet, but it can also be used as a phone, thanks to the continued upswing of VoIP applications, which send voice and media messages over the Internet—not over a cellular network. There are many VoIP apps on Google Play that let you make free phone call ...more

Besside-ng is the hidden gem of the Aircrack-ng suite of Wi-Fi hacking tools. When run with a wireless network adapter capable of packet injection, Besside-ng can harvest WPA handshakes from any network with an active user — and crack WEP passwords outright. Unlike many tools, ...more

No matter your reasons, you might need a second phone number that's a little more disposable than your primary number — a "burner" number, so to speak. If you create this burner number using Google Voice, you'll get new functionality like call forwarding and voicemail transcri ...more

There are a surprising number of hidden features in your iPhone's Phone app, from secret dialer codes that provide info or perform actions to special characters that dial extensions automatically. However, there's one little-known trick every iPhone owner should know when usin ...more

Welcome back, my hacker noviates! In a recent post, I introduced you to Shodan, the world's most dangerous search engine. Shodan crawls the globe from IP to IP address, attempting to pull the banners of each web-enabled device and server it finds. These banners are what the ...more

If you read my article on the OSI model, you got a good overview on communications from that model's perspective, but how does that relate to TCP/IP? We're going to take it a step further, getting into the idea behind the two address concept. How does an IP address and a MAC a ...more

The new iOS 14 for iPhone arrived Wednesday, Sept. 15, 2020, alongside iPadOS 14, and there are a lot of features to uncover. Improved widgets. Better home screen customization. Exciting Messages improvements. New abilities in Camera and Photos. There's so much here that it'll ...more

Smartphones are great. They help you keep in touch with your loved ones and stay up to date on what's going on in the world. The problem is that like everything else that's useful, they cost money to use, and between calling, texting, and data plans, it can get really expensiv ...more

Signal Private Messenger is famous for its end-to-end encryption, but you can't even use the messaging app without having a real phone number attached to it. Luckily, there is a way around this limitation, so you can use Signal even if you don't have a valid SIM card in your s ...more

Welcome back, my rookie hackers! As hackers, we are often faced with the hurdle of cryptography and encryption. In some cases, we use it to hide our actions and messages. Many applications and protocols use encryption to maintain confidentiality and integrity of data. To be a ...more

Messaging apps can be a double-edged sword. Not only do they let you interact with other people, but they also let you go back and reminisce on past exchanges. However, that same archive can be used against you in certain situations. Luckily, Signal can be manipulated to remov ...more

By using almost any packet-crafting tool, a hacker can perform denial-of-service (DoS) attacks. With the power to create just about any packet with any characteristics, a hacker can easily find one that will take down a host or network. Nmap and Hping are effective packet mani ...more

Buying an unlocked phone is usually the correct move. By doing so, you bypass a lot of bloat that carriers put on your phone, and you can also use that phone with another carrier should you decide to switch to a new one. However, a lot of carriers won't give unlocked devices a ...more

This Null Byte is the first part in a mini-series on the art of Social Engineering. I will be teaching you how to effectively defend yourself against it. What is Social Engineering? Social Engineering is the art of hacking humans. It's when a person is manipulated into doing ...more

If you're living or staying out in the middle of nowhere or a rural area outside of a big city or town — where there are no reliable cable, fiber, or wireless networks available — how can you get an internet connection? There are several possibilities, but they all come with t ...more

Welcome back, my rookie hackers! Several of you have written me asking about where they can find the latest hacks, exploits, and vulnerabilities. In response, I offer you this first in a series of tutorials on finding hacks, exploits, and vulnerabilities. First up: Microsoft ...more

Being seen clearly is an essential part of any video call you're on, but being heard is equally important. Lousy audio from your side can ruin the experience for others on the call if they can't understand you or hear the sounds they need or want to hear. To improve your audio ...more

Social engineering is a pretty important item in a hacker's toolkit. In Mr robot there was a time, we saw Elliot using social engineering to gain access to his therapist's boyfriend's email and bank accounts by calling him and pretending to be someone from his bank, then Elli ...more

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 ...more

Welcome back, my rookie hackers! "How can I travel and communicate over the Internet without being tracked or spied on by anyone?" It's a question many Null Byteans have asked me, so I have decided to write a comprehensive article addressing this issue. There are a multitude ...more

The iPhone and iPod touch are nearly identical devices, especially now that Apple has added a front-facing camera to the iPod touch. All that's missing is the phone part. With the help of Lifehacker and apps like Skype and Line2, you can save some money by turning your iPod To ...more

Skype is a great service. It allows a free solution for VoIP to VoIP calls, and cheap VoIP to landline calling. However, a very disturbing, little known fact that might push you away from Skype does exist. If you closely read the terms of service agreement, it clearly says tha ...more

Your iPhone's Camera app isn't the only place you can use Portrait mode for selfies. An easy-to-miss feature built right into iOS lets app developers leverage Apple's powerful Portrait mode effect in their own apps, so you can add a shallow focus effect to photos and videos wh ...more

You've probably heard of RCS messaging. The new standard has been promoted by Google as their answer to iMessage and is the backbone behind the new "Chat" features in Android Messages. With RCS, Android phones will now enjoy enhanced messaging like iPhone users have had for ye ...more

In these times of social distancing, video calling is becoming the technological substitute for face-to-face connections. For those who carry an iPhone, the art of video calling defaults to FaceTime, the native app on iOS that is exclusive to Apple devices. But what do you do ...more

Due to the overnight success of smartphones, millions of people are connecting with others. Currently, over 15 million text messages are sent every minute worldwide. Most of this communication is happening in the open where any hacker can intercept and share in the discussion ...more

Every summer for the last 26 years, hoards of hackers have descended on the Las Vegas Strip for DEFCON, the biggest hacker conference in the US. There's a wealth of talks every season (DEFCON 27 has at least 95 scheduled), and there have been some essential topics to learn fro ...more

So you're finally ready to head out on that big trip you've been planning for months, huh? It's an exciting time, but there are plenty of things you'll need to prepare before you head out. For instance, it's hard to imagine life without a smartphone these days, and with useful ...more

Mikoto, from Karen Tsai (aka angelxwind), is a free jailbreak tweak unlike any other. With Mikoto, you can customize features in your favorite iOS apps to an extent that you would've never thought possible. Not only is the tweak elegantly designed, but it also has more settin ...more

Now that smartphones have ensured that we're connected to the internet 24/7, online privacy has become more important than ever. With data-mining apps hoping to sell your information for targeted ads, and government agencies only one subpoena away from knowing every detail of ...more

We're officially seeking Null Byters on a weekly basis who are willing to take the time to educate the community. Contributors will write tutorials, which will be featured on the Null Byte blog, as well as the front page of WonderHowTo (IF up to par, of course). There is no ne ...more

When OS X Yosemite was first announced, there were a number of features that struck my attention, but one in particular that stood out above them all was the ability to make and receive texts and phone calls from your Mac, which Apple calls Continuity. I probably use iMessage ...more

The Google Nexus S smartphone is finally here! Well… almost. Nexus S is the first smartphone based on the Gingerbread OS (Android 2.3) and will be available for purchase online and at Best Buy store locations everywhere, come December 16th, with T-Mobile service. Aah… just ...more

Hello ladies and gentlemen, I'm back with another informative(hopefully) article for you all. Once again I would like to apologize for my absence for about a week or so. I have some stuff going on with my life and university and I haven't found enough time to make a fully in-d ...more

Facebook just added another feature to Messenger as part of its quest to have their service become an all-encompassing communications app. This feature lets you make free group calls using Messenger's VoIP service, and you can chat with up to 50 people at once. Don't Miss: Ho ...more

Welcome back, my greenhorn hackers, and happy New Year! Now that your heads have recovered from your New Year's Eve regaling, I'd like to grab your attention for just a moment to preview 2015 here at Null Byte. I hope you will add your comments as to what you would like to se ...more

Whether it's a short road trip or an 18-hour flight, our phones are now essential travel companions. No longer do we need a GPS unit, maps, cameras, camcorders, or even boarding passes. However, not all phones are created equal in this regard. Some are more suited for travelin ...more