Welcome

My name is Mattias Högström, and I live and work in the south of Sweden. I have worked as a developer and software architect for more than 20 years. The last 5 years I have switched over to security, among many things, security assessment, penetration testing, hardening, and secure development.

As a person both interested in software developement and cybersecurity. It is a perfect combination to create ones own tools for automating security checks, hardening, and testing ideas.

One such adventure was to build my own Password cracker running on a computer rig with 6 GPUs. This feat required learning GPU programming, and thinking about ways to optimize the code to make it run faster. Todays machines are capable of executing more than 4 billion cycles per second, on each and every core. CPUS is also hyper-scalar, meaning it can execute more than one instruction per cycle. However it is a challenge to keep the CPU busy. Only certain jobs can be parallelized to run on multiple cores, and it can be a challenge to keep the cores busy, being CPU or GPU cores.