George Chen – Medium

George Chen

Sharing 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.

5 min readAug 2, 2023

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Sharing the last 4 characters of your NRIC? Think twice.

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George Chen
in
The PayPal Technology Blog

Purposeful 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…

5 min readJul 20, 2022

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Purposeful Innovation for Good

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George Chen

Banks, stop asking for verification when calling customers

Bank have a practice of asking for verification information when calling customers even while using unrecognised numbers. Should we…

2 min readAug 24, 2021

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Banks, stop asking for verification when calling customers

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George Chen
in
The PayPal Technology Blog

Put on Your White Hat and Hack for Good

Skills-based volunteering and giving is the intersection where businesses and professionals meet with nonprofit organizations (NPOs) to…

7 min readJul 20, 2021

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Put on Your White Hat and Hack for Good

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George Chen

Hack The Box’s Cyber Apocalypse 2021 CTF— AlienPhish — Write-up

My 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.

3 min readApr 24, 2021

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Hack The Box’s Cyber Apocalypse 2021 CTF— AlienPhish — Write-up

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George Chen

False Positives

What is a False Positive (FP) in security? In working with different analysts and consultants, I realised they each have their definitions…

2 min readDec 23, 2020

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George Chen

REconstrucQ

Here’s another writeup of another challenge of GovTech CSG’s CTF 2020 competition. This one was the easiest — took three minutes.

1 min readDec 9, 2020

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REconstrucQ

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George Chen

Where’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…

4 min readDec 7, 2020

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Where’s the flag?

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George Chen

Hunt 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…

4 min readDec 7, 2020

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Hunt him down!

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George Chen

Mnemonic for Mitre Enterprise Tactics

A easy-to-remember acronym for Mitre’s Enterprise Tactics.

2 min readJul 18, 2020

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Mnemonic for Mitre Enterprise Tactics

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George Chen

George Chen

Global Threat Hunting Manager at PayPal. George is a site lead for Innovation Lab & Community Impact. In his spare cycles, he lectures cybersec at a University.

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