Jamie Scaife - United Kingdom 🇬🇧

Using a Bloom Filter to Anonymize Web Server Logs

Monday 17th December 2018

Since May 2018 when the GDPR came into full effect, I have had web server access logging completely disabled for my site. This is great from a security, privacy and GDPR compliance point of view, however it meant that I had very limited insight into the amount of traffic my site was getting.

In order to solve this problem, I have built an open-source log anonymization tool which will remove personal data from web server access logs, and output a clean version that can be used for statistical purposes. A bloom filter is used to identify unique IP addresses, meaning that the anonymized log files can still be used for counting unique visitor IPs.

I've released the tool under the MIT license, and it's available on my GitLab profile: https://gitlab.com/jamieweb/web-server-log-anonymizer-bloom-filter Continue reading...

Security Apache

Introduction to Reverse Engineering with radare2 Cutter - Part 2: Analysing a Basic Program

Saturday 17th November 2018

I've put together a basic program that takes a number as an input, and outputs whether the number is odd or even.

Enter a Number (or q to quit): 2
2 is even.
Enter a Number (or q to quit): 1
1 is odd.
Enter a Number (or q to quit): 25
25 is odd.
Enter a Number (or q to quit): hello
Invalid Input
Enter a Number (or q to quit): q

If you wish to compile this yourself so that you can follow along with the analysis, I have included the C++ code... Continue reading...

Reverse Engineering Guide

Booting a Physical Windows 10 Disk Using VirtualBox on Linux

Friday 9th November 2018

I recently acquired a computer with an OEM/factory-imaged Windows 10 disk inside. Straight away I took the disk out and replaced it with a Linux SSD, however since I don't own any other Windows systems, this will come in useful for testing my website for browser compatibility in Internet Explorer and Edge. I have put the Windows 10 disk in a USB SATA drive enclosure, and configured VirtualBox to be able to boot the raw disk. Continue reading...

Virtualisation Guide

Introduction to Reverse Engineering with radare2 Cutter - Part 1: Key Terminology and Overview

Tuesday 23rd October 2018

Cutter is an open-source graphical user interface for the radare2 reverse engineering framework. This article contains an introduction to reverse engineering with Cutter, including key terminology and an overview of the Cutter interface and available tools. Cutter can be found on GitHub here: https://github.com/radareorg/cutter Continue reading...

Reverse Engineering Guide