Costly Errors Search Results

How To: Detect Bluetooth Low Energy Devices in Realtime with Blue Hydra

Bluetooth Low Energy (BLE) is the de facto wireless protocol choice by many wearables developers, and much of the emerging internet of things (IoT) market. Thanks to it's near ubiquity in modern smartphones, tablets, and computers, BLE represents a large and frequently insecure attack surface. This surface can now be mapped with the use of Blue Hydra.

How To: Advanced Cryptography - Total Guide

Hello people again, I wrote my last post about crypto about 10 months ago, now I will introduce something not fresh for the science, but fresh for the people who wants to learn. In my http://null-byte.wonderhowto.com/forum/cryptography-0161538/ post of crypto concepts, there is just basics, today we will see something that targets wide concepts like Symmetric crypto, Public Key Cryptography, Hashing, Keys etc...

Networking Foundations: Dynamic Host Configuration Protocol

Hello ladies and gentlemen, PySec here coming at you with another informative(hopefully) article for you all. In the last tutorial, we finally finished our discussion about IP Addressing and I intentionally didn't mention a really important concept with which IP Addressing wouldn't be feasible without it. What I'm talking about is how our network device gets the IP Address in order to communicate with other devices on the network/Internet. There are many different ways for that to be accompli...

How To: Security-Oriented C Tutorial 0x21 - Linked Lists

Welcome to the final tutorial of the series on standard C. This article will cover the linked list abstract data type (ADT). There will be a lot of abstraction to try to deliver the understanding in the most basic way for easiest interpretation of what they are and how they work, then we will get into the guts of it and learn the technical code underneath. For those who have yet to grasp the concept of pointers, it's advisable that you do that first before approaching this. Having learned thi...

How To: Jailbreak iOS 8.0-8.1.1 on Your iPad, iPhone, or iPod Touch (& Install Cydia)

The release of iOS version 8.1.1 brought some much needed bug fixes to Apple's mobile operating system, but with it came a patch for Pangu's jailbreak method, which worked on iOS 8.0 to iOS 8.1 using a Mac or Windows computer. Luckily, it didn't take very long for a new team of developers to come up with a method for jailbreaking iOS 8.1.1 devices, and much like its predecessor, the process is a cinch.

How To: Every Mac Is Vulnerable to the Shellshock Bash Exploit: Here's How to Patch OS X

Heartbleed, move over. There's a new bug in town, and this time it's also affecting Mac and Linux computers. It's called Shellshock (its original official title is CVE-2014-6271), and it's currently got a 10 out of 10 severity rating over at the National Cyber Awareness System. While some updates have been issued to fix this bug, they were incomplete, and your system is probably still vulnerable, as it has been for the last probably 20 years.

How To: Unjailbreak Your iPhone & Restore It Back to Factory Settings

Jailbreaking gives you root access to the iOS file system, allowing you to install third-party apps and tweaks on your iPhone that aren't available in the App Store. It opens up a whole new realm for what your device can do, but it can also cause instability across the system and can dissuade you from getting future updates from Apple that have important features, bug fixes, and security enhancements.

How To: Understanding Signature Schemes: How Data Sources Are Authenticated, Secured, & Spoofed

One of the biggest problems in data security is authentication of data and its source. How can Alice be certain that the executable in her inbox is from the venerable Bob, and not from the not-so-venerable Oscar? Clearly Alice wants to know because if this file is actually sent to her by Oscar, the file might not be a game, but a trojan that can do anything on her computer such as sift through her email and passwords, upload her honeymoon pictures, or even turn on microphones and webcams. Thi...

How To: Know Who's Not Who They Claim to Be Online

All kinds of people pretend to be someone they're not on the internet, including scammers, people attempting to wind others up, hackers and web predators. Almost all of these people will leave bases uncovered and they're all easy to expose when you understand how to. Here are my favorite ways of finding out when somebody is lying quickly. Image Search

How To: Apple Finally Lets You Set Early Notifications for Reminders to Get Custom Alerts Before Tasks Are Due

The Reminders app is a simple yet powerful task manager, and it does a great job of reminding you to start an errand, alerting you to a project that's supposed to be done, or prompting you about a recurring chore. But with the latest Reminders update, the dates and times you set for tasks can act more like due dates thanks to the new early reminders feature.

How To: Make Your iPhone Auto-Delete Old Screenshots So Your Photos App Doesn't Become a Hot Mess

If you're like me, you take more than just a few screenshots throughout the day, and they add up fast on your iPhone. When you snap that many images of the screen, your Photos app's "Screenshots" folder can swell beyond triple digits if you don't manage it, and your "Recents" folder will become a cluttered mess. But there is a trick to keeping screenshots in check, and you can have total control over it.

How To: There's an Easy Way to See All the Unsent Messages in Your iMessage Conversations

While you can quickly see the edit history of a modified iMessage in the Messages app, there's no way to view an iMessage that somebody in the conversation deleted unless you happened to see it before it disappeared. But that's only true if you didn't implement these security measures on your iPhone.

How To: 32 Things You Didn't Know About Your iPhone's Keyboard

Apple's stock keyboard for iPhone has gone through many changes over the years. Some have been significant, and others more subtle. Overall, most of these updates have been fairly obvious, so you're probably already using them — but there are more than a few interesting features that were slipped in under the radar that you may not know about.

How To: Trick Your MacBook's Touch ID into Registering Twice as Many Fingerprints for Each Account

While Touch ID has been a part of the iPhone's legacy since 2013, Apple waited until 2016 to add biometrics to its MacBook lineup, and it's not as impressive. An iPhone with Touch ID can register up to five fingerprints, but Macs can only register a maximum of three per account. If that seems unfair, there's an easy trick to doubling that number, meaning six of your fingerprints could unlock your laptop!

How To: Scan Websites for Potential Vulnerabilities Using the Vega Vulnerability Scanner in Kali Linux

Withstanding an attack from a motivated hacker is one of the most important responsibilities a system administrator must undertake. This is especially true for websites that may contain sensitive customer information and a high volume of users. So it's important for a sysadmin to take proactive measures to find and fix vulnerabilities in their websites.

How To: Need More Time on a Work Assignment or School Project? Corrupt Your Files to Extend Your Deadline Without Question

You have an assignment due, whether it's homework for school or a project for work, but you've only got a few hours left. There's no way you're going to finish in time and do a good job, and you don't want to turn in anything incomplete or half-assed. While it may seem you're out of luck, there's a simple way to buy yourself more time.

How To: This Shortcut Lets You Easily Download Twitter Videos & GIFs to Your iPhone's Photos App

There are tons of different ways to download videos and GIFs from Twitter onto your iPhone for offline viewing, but frankly, they all kinda suck. You might have to download a third-party app or copy a link and paste it into a random website — and while they work, there are better options. TVDL, a shortcut on iOS, makes the process of downloading Twitter videos and GIFs fast and easy.