## What Is Entropy In Cryptography?

In cryptography, entropy refers to the randomness collected by a system for use in algorithms that require random data. A lack of good entropy can leave a cryptosystem vulnerable and unable to encrypt data securely.

## How to Make a Simple Vue Custom Select Component

Creating a custom select tag with your own styling is notoriously difficult. Sometimes it’s impossible without building your own from scratch using a combination of styled divs and custom JavaScript. In this article, you’ll learn how to build a Vue custom select component that can be easily be styled using your own CSS. In fact, … Read more

## Running Python in the Browser with Web Assembly

We’ve been wanting to expand Qvault’s curriculum, and one of the most requested programming languages has been Python. Because our courses allow students to write and execute code right in the web browser, we decided to look into existing projects that allow a Python interpreter to run in the browser using Web Assembly. We settled … Read more

## Running Go in the Browser with WASM and Web Workers

We’ve recently made big changes to how we execute Go in the browser on Qvault and want to explain the enhancements. Web Workers are the reason we’ve been able to solve some of the serious browser-related coding problems that were holding us back. Consider this article a sequel to Running Go in the Browser with … Read more

## Practical Patterns for Technical Writing

Writing technical documents like API or architectural documentation which exceeds a simple flow diagram can be a daunting task. If you have some experience with technical documents, you will probably agree that there is nothing more frustrating than bad documentation. Lately, technical writing has become a more important part of my job, so I put … Read more

## (Very) Basic Intro To Elliptic Curve Cryptography

Elliptic curve cryptography is a modern public-key encryption technique based on mathematical elliptic curves. Elliptic curve crypto often creates smaller, faster, and more efficient cryptographic keys. In this introduction, our goal will be to focus on the high-level principles of what makes ECC work. For the purposes of keeping this article easy to digest, we’ll omit implementation … Read more

## Go’s Major Versioning Sucks – From a Fanboy

I’m normally a fan of the rigidity within the Go toolchain. In fact, we use Go on the front and backend at Qvault, and we’ve found that it’s wonderful to have standardized formatting, vetting, and testing across the entire language. The first real criticism I’ve had is with the way Go modules handle major versions. … Read more

## “Big-O Algorithms” Course Released

We’ve launched our new Big-O Algorithms course! We wrote this course for engineers who need a refresher on computer science basics or want to learn the fundamentals for the first time. The study of algorithmic complexity is often overlooked by new developers, and we’ve found that get-rich-quick boot camps often skimp on these details. It’s … Read more

## Is AES-256 Quantum Resistant?

With quantum computers getting more powerful each year, many worry about the safety of modern encryption standards. As quantum computers improve in performance and the number of qubits used for calculations increases, current cryptosystems are under threat. AES-256 is one of the most powerful symmetric ciphers, but will it remain secure in a post-quantum world? … Read more

## How to Make Pure Functions (Go)

Pure functions are often hyped up in the JavaScript world, probably because of the abundance of stateful front end applications. While pure functions have their downsides (i.e. inconvenience, potentially large argument lists), they should be used as much as reasonably possible. We’ve made a lot of changes in the Qvault app codebase recently to use … Read more