Encrypt And Decrypt Data In A Golang Application With The Crypto Packages

Being able to encrypt and decrypt data within an application is very useful for a lot of circumstances. Let’s not confuse encryption and decryption with hashing like that found in a bcrypt library, where a hash is only meant to transform data in one direction.

Not too long ago I wrote about in a previous article how to encrypt and decrypt data using Node.js. This was partially inspired by me learning how to build software wallets for cryptocurrencies and encrypting the sensitive information. However, what if we wanted to use Go instead of Node.js?

We’re going to take a look at encrypting data and then decrypting it within a Go application by using the already available crypto packages.

Use Sendy To Build And Maintain An Email List For Cheap

When you’re building a business, the experts all say that you should make your list building strategy a priority. Using social networks like Twitter and Facebook for your marketing is great, but those might not be around forever. Email has been around for a long time and it will likely exist a long time into the future as well.

I’ve briefly mentioned this before, but I’m currently using Sendy to manage my email subscribers and send out my monthly newsletter. However, I wasn’t always using Sendy to accomplish this task. For around a year, I was using Mailchimp, a similar product.

We’re going to see what Sendy is, how to use it, and why I’m using it over the various alternatives that exist.

Tracy Developer Meetup in California

After having thought about it for quite some time, I’ve finally decided to start a developer user group in my home town of Tracy, California. This group titled, The Tracy Developer Meetup, was started to give developers living outside of the Bay Area, a chance to collaborate with other developers in the same position.

If you’re unfamiliar with Tracy, it is a town about 1.5 hours from San Francisco and Mountain View, but significantly more affordable and home to many engineers that commute to the Bay Area for work.

Use Angular To Create A Cross-Platform Stellar XLM Desktop Wallet

With Android and iOS so obtainable and development so easy, people often forget the importance of desktop applications. I have a phone and tablet, but I depend on my desktop applications much more. However, the development of these applications are not difficult.

With frameworks like Electron, developers can create cross-platform desktop applications with JavaScript and HTML. Take the example I wrote about previously in the article titled, Create a Cross-Platform Desktop DigiByte DGB Wallet with Angular and Electron. I demonstrated how to leverage a very popular framework to create a cryptocurrency wallet.

DigiByte isn’t the only popular blockchain on the internet. I’ve also been looking into Stellar because of all the buzz it has been receiving from popular companies like Stripe.

We’re going to see how to create a Stellar XLM wallet for Mac, Windows, and Linux using Angular and Electron.

Create An Email Subscription Popup With jQuery

As you’ll recall, The Polyglot Developer was once using WordPress. Back when I was using WordPress, I was using a plugin called Icegram, which is similar to SumoMe and OptinMonster, but it allowed me to present popups after a period of time to prompt users to subscribe to my newsletter.

I get that not everyone appreciates an annoying popup, but it was great for me because I was getting a lot of new email subscribers very quickly.

Since having dropped WordPress, I haven’t been able to find a plugin that offered similar functionality to what I had. This inspired me to create my own plugin using jQuery that I could use anywhere, including my Hugo powered blog. We’re going to see how to create our own opt-in style popup for collecting email leads.

Scan For BLE iBeacon Devices With Golang On A Raspberry Pi Zero W

Last year I had worked on an interesting project at my day job, Couchbase, where I scanned for BLE iBeacon devices from a few Raspberry Pi IoT devices and uploaded the information to a remote server for analysis. I wrote about this experiment in an article titled, Collecting iBeacon Data with Couchbase and Raspberry Pi IoT Devices.

My first attempt at scanning and analyzing iBeacon data was done with Java and Node.js. The Raspberry Pi devices were using Java, and the data was being offloaded to a Node.js server. The problem with this is that Java is too heavy for the low spec Internet of Things (IoT) devices.

Fast forward to round two of playing with iBeacon devices and a Raspberry Pi. We’re going to see how to use Golang to scan for BLE signals and parse the data to determine if they are iBeacon.

Create Paper Wallets For Stellar XLM Coins With Angular

Continuing down my adventure of learning about and investing in various cryptocurrencies, I thought I’d explore Stellar, which is what I understand to be, a competitor to Ripple. If you’ve been keeping up, you’ll remember that I had written about creating a Ripple XRP paper wallet in a tutorial titled, Generate Cold Storage Paper Wallets for Ripple XRP Coins with Angular.

In this tutorial, we’re going to see how to accomplish the same task of generating a cold storage paper wallet with Angular, but this time we’ll be doing it for Stellar XLM coins.