George Chen – Medium

George Chen

Penalized for Responsible Disclosure

While researching a new attack vector (presented in BSides SG 2022), my associate and I discovered a misconfiguration in one of the Big…

Oct 24

Penalized for Responsible Disclosure

Oct 24

Automated Allowlisting and Optimization of High-Volume Alerts for SecOps Efficiency

One of the top-ranked problems of SecOps alerting is dealing with the amount of noise generated by false positives (FP) while keeping a…

Oct 13

Automated Allowlisting and Optimization of High-Volume Alerts for SecOps Efficiency

Oct 13

Changed Your PayNow Display Name? Your Mobile Number Still Reveals More Than You Think.

PayNow

Oct 12

Changed Your PayNow Display Name? Your Mobile Number Still Reveals More Than You Think.

Oct 12

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

3-Tier Password Management

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

Jul 5

3-Tier Password Management

Jul 5

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

Published 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

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

Published 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

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

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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