Category Archives: Computers

Sometimes I write Ruby code. Occasionally, it even works.

Writeup – Old Crypto Server (AeroCTF)

This weekend, I spent a little bit of time doing AeroCTF, but couldn’t maintain focus due to the sheer number of other active projects. I solved one challenge in the time allocated, a fairly straightforward AES padding game that you … Continue reading

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Fault Injection on Linux: Practical KERNELFAULT-Style Attacks

This post will detail my examination of the KERNELFAULT paper, which you can download here. In brief summary, the KERNELFAULT paper describes a methodology for injecting faults into a system running Linux, for the purpose of privilege escalation to root, … Continue reading

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Late Writeup – SimpleMachine (Codegate 2020 Teaser)

This weekend, I participated in the Codegate 2020 Teaser CTF. I started late – in my defence, ctftime’s time reporting was inaccurate, and I was able to solve the SimpleMachine challenge, though far too late to get points. The writeup … Continue reading

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The Z80 Adventure Part III

In my last post on this topic, I discussed improvements to my Z80 computer, which allowed the use of peripherals from within the Z80 OS. I recently rebuilt this computer, to allow for a bit more extensibility (and eventually, LED … Continue reading

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Notes on RF Retroreflectors

Over the past few weeks, I’ve been spending some time learning about RF retroreflectors. The goal of this is to improve my understanding of the theory and application of RF in general. An RF retroreflector is a device which takes … Continue reading

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