George Chen – Medium

George Chen

George Chen

Disabling Microsoft Authenticator’s 1FA Sign-in Flow

I’ve recently noticed an increasing number of malicious sign-in attempts on my Outlook email account. The interesting bit is that I…

Jul 14

Disabling Microsoft Authenticator’s 1FA Sign-in Flow

Jul 14

George Chen

3-Tier Password Management

Using a 3-tier password management structure to manage your password managers.

Jul 5

3-Tier Password Management

Jul 5

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.

Aug 2, 2023

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

Aug 2, 2023

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…

Jul 20, 2022

Purposeful Innovation for Good

Jul 20, 2022

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…

Aug 24, 2021

Banks, stop asking for verification when calling customers

Aug 24, 2021

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…

Jul 20, 2021

Put on Your White Hat and Hack for Good

Jul 20, 2021

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.

Apr 24, 2021

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

Apr 24, 2021

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…

Dec 23, 2020

Dec 23, 2020

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.

Dec 9, 2020

REconstrucQ

Dec 9, 2020

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…

Dec 7, 2020

Where’s the flag?

Dec 7, 2020

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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