Laravel Tech Community

Sep 26, 2022 · Information Security

Why Mobile Payment Passwords Are Limited to Six Digits: Security, Brute‑Force, and Human Memory Limits

The article explains why popular mobile payment platforms like WeChat and Alipay use six‑digit numeric passwords, discussing brute‑force attack complexity, the rapid growth of computing power, human short‑term memory limits, and additional authentication layers that together make six‑digit passwords a practical balance of security and usability.