George ChenSharing the last 4 characters of your NRIC? Think twice.“Don’t worry; we’re only collecting the last 4 characters of your NRIC.” — famous last words.Aug 2, 20231Aug 2, 20231
George CheninThe PayPal Technology BlogPurposeful Innovation for Good“To be a company for good, we need to build purpose into the fabric of our business, such that the day-to-day operations and actions we…Jul 20, 2022Jul 20, 2022
George ChenBanks, stop asking for verification when calling customersBank have a practice of asking for verification information when calling customers even while using unrecognised numbers. Should we…Aug 24, 2021Aug 24, 2021
George CheninThe PayPal Technology BlogPut on Your White Hat and Hack for GoodSkills-based volunteering and giving is the intersection where businesses and professionals meet with nonprofit organizations (NPOs) to…Jul 20, 2021Jul 20, 2021
George ChenHack The Box’s Cyber Apocalypse 2021 CTF— AlienPhish — Write-upMy colleagues are I took part in the 5-day CTF by HTB in April ’21, where every challenge solved raises some donation to a good cause.Apr 24, 2021Apr 24, 2021
George ChenFalse PositivesWhat is a False Positive (FP) in security? In working with different analysts and consultants, I realised they each have their definitions…Dec 23, 2020Dec 23, 2020
George ChenREconstrucQHere’s another writeup of another challenge of GovTech CSG’s CTF 2020 competition. This one was the easiest — took three minutes.Dec 9, 2020Dec 9, 2020
George ChenWhere’s the flag?This is a writeup for one of the challenges of GovTech CSG’s CTF competition. While this challenge isn’t eligible for the awesome writeup…Dec 7, 2020Dec 7, 2020
George ChenHunt him down!GovTech CSG did a phenomenal job in organising a 48-hour CTF competition over the weekend. While my team and I only captured 15 flags and…Dec 7, 2020Dec 7, 2020
George ChenMnemonic for Mitre Enterprise TacticsA easy-to-remember acronym for Mitre’s Enterprise Tactics.Jul 18, 2020Jul 18, 2020