Hacking Deterministic Bitcoin Addresses

Bitcoin's almost 10 year lifespan so far has subjected the technology and its' implementation to all kinds of attack and critical inquiry. Meanwhile the value of Bitcoin as a tradable instrument has also fluctuated wildly as I'm sure you already know. I'm not here to speculate on Bitcoin's so-called value, or the unfortunate aspects of … Continue reading Hacking Deterministic Bitcoin Addresses

Hardening SSH on your Ubuntu Server

Secure Shell (SSH) is an amazing cryptographic network protocol, and it undoubtedly helps secure a huge slice of today's Internet - giving sysadmins robust remote access to their servers, but also so much much more. I've been using SSH on Linux Servers for longer than I can remember. Well, not quite. I do remember those "telnet" days when nobody had … Continue reading Hardening SSH on your Ubuntu Server

AusCERT2016 CTF – 10th Place!

I recently finished competing in the AusCERT2016 Capture the Flag (CTF) challenge which ran for 48 hours. Coming in 10th place from dozens of active participants was very rewarding! I entered under the team alias "InsertCoin"- partly to protect myself if I performed terribly(!) but also because I'm currently looking for new work opportunities - and the name subtly describes my current state-of-mind … Continue reading AusCERT2016 CTF – 10th Place!

Huntercoin node on Ubuntu 16.04

Following on from some recent research into Cryptocurrencies, I've been looking at the somewhat unique Huntercoin. It claims to be a so-called "human mine-able" cryptocurrency. I'm not so much interested at the moment in actually playing what I presume is some kind of online game for mining the coins, as I see there is a core … Continue reading Huntercoin node on Ubuntu 16.04