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title: Talks by Ariejan
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**I'm available for talks and workshops!**
## Gnu Privacy Guard and You
This talk highlights why GPG is more relevant than ever in a modern age where government
spying is the norm and no one on the internet can be trusted. We also take a dive in to
how the RSA public key algorithm works at its core and how you can get started with GPG *today*.
This talk contains (for some audiences complex) math, I've also made a
[MathSanitized™ version](https://speakerdeck.com/ariejan/gnu-privacy-guard-and-you-math-sanitized-version).
## Objective-C Awesomesuace
Ruby and Objective-C seem like programming languages from two different worlds. When
you take a closer look at them, you will start to see similarities. As a Ruby developer,
I want to highlight these similarities in this talks and learn from what Objective-C does
differently from Ruby.
## Software Craftsmanship
A talk I did for about 200 Unit4 developers on june 6th about software craftsmanship and how we do that at Kabisa.
## Introducting Gitlab
Gitlab is an awesome git-repo-tool-project-manager-web-ui-thingy you should know about.