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Will Banning Cryptography Keep the Country Safe?

Feb 05, 2020 by Lane Wagner

Politicians in the United States have been claiming recently that end-to-end encryption is certainly too dangerous to permit. This movement is serious. Congress even introduced a bill that would remove the protections that we currently have that allow us to legally encrypt information. Lindsey Graham is one such proponent of this restrictive legislation: Senator Lindsey Graham, a top Trump ally, is targeting giant internet platforms with a child protection measure that could threaten tech companies’ use of encryption and a liability exemption they prize.

How To Cache Images - React Native Expo (Managed)

Feb 04, 2020 by Lane Wagner

Caching images in React Native can be easy, even if you are using Expo’s managed workflow. The problem many devs run into is that React Native only supports caching images on IOS out of the box. Other popular community packages that work on Android contain native code, and as such don’t work with Expo’s managed workflow. For this reason, I open-sourced the code I’m using on my latest project. Behold, react-native-expo-cached-image!

Is Open-Source Cryptography Really Secure?

Jan 30, 2020 by Lane Wagner

The purpose of cryptography is to keep information private, and the purpose of open-source is to make code public… So we shouldn’t open-source our cryptography algorithms right? I’ve been asked this several times by multiple people so I figured it is a subject worth addressing. Many developers seem to be under the impression that crypto and security systems (the application-specific implementation of cryptosystems) are more secure if their details are kept private.

Hashing Passwords - Python Cryptography Examples

Jan 29, 2020 by Lane Wagner

Building a from-scratch server or using a lightweight framework is empowering. With that power comes responsibility, specifically the responsibility to securely store user’s passwords. Not understanding the security implications of password storage can lead to devastating breaches and leaks. If you are building an application and need to store user credentials, learn about hash functions. Can I Store Passwords In Plain Text? To demonstrate the potential dangers, let us assume we DON’T hash passwords on a fake example website, LoveMatchingToday.

Why is Exclusive Or (XOR) Important in Cryptography?

Jan 18, 2020 by Lane Wagner

If you are getting into cryptography, or just trying to understand the fundamentals, you may have noticed that the exclusive-or (XOR) operation is used quite often, especially in ciphers. XOR is a simple bitwise operation that allows cryptographers to create strong encryption systems, and consequently is a fundamental building block of practically all modern ciphers. Let’s dive into the details and see what makes XOR so important. What is XOR (⊕)?

JavaScript With Statement Explained – A Deep Dive

Jan 15, 2020 by Lane Wagner

JavaScript’s built-in with statement specifies the default object for the given property and gives us a shorthand for writing long object references. More precisely, it adds the given object to the head of the scope chain. Note: Use of the with statement is discouraged. It can lead to strange bugs. That said, it’s important to understand how it works because it may exist in legacy code. With Function Syntax Usage with (expression){ statement } expression: An expression that evaluates to an object that will become the default object inside its scope.

JavaScript Map Function Explained - A Deep Dive

Jan 12, 2020 by Lane Wagner

The built-in JavaScript map function returns a new array, where each element in the new array is the result of the corresponding element in the old array after being passed through a callback function. Later in the article, we’ll do a deep dive into some more advanced concepts regarding the map function and its uses. Map Function Syntax Example Usage let newArray = oldArray.map(function callback(currentValue, index, array) { // return element for new_array }, thisArg) The Array object’s built-in map method takes a function definition as its first parameter.

BitBanged SPI in Go, An Explanation

Jan 09, 2020 by Lane Wagner

I’m going to focus mostly on some design decisions and also how I went about writing an SPI interface using Go on a Raspberry Pi. I assume my readers have a basic understanding of what a Raspberry Pi is, and how basic electronics work. If not, read on anyway and I will be sure to include some valuable resources below. Why Go? In a past life, I worked on hardware interfacing software.

Top 8 Online Crypto Communities

Jan 08, 2020 by Lane Wagner

Crypto has been explosive in 2021. The gains have been even better than the memes! While dancing cat videos are fun, the wise will also take advantage of the various communities as an opportunity to learn more about the technology that supports decentralized money. I’ve put together a small list of the top crypto communities for you to check out this year! #1 Bitcointalk Bitcointalk is undoubtedly the gold standard for the crypto community on the web.