Multi-Factor Authentication (MFA) Explained: Types, Bypass Attacks and Best Practices (2026)

By HOC Team  |  Last updated: August 2026  |  Read time: ~22 min In September 2022, Uber suffered a complete network compromise. The attacker purchased a contractor's VPN credentials on the dark web, but those credentials were protected by MFA — specifically, Duo push notifications. The attacker's solution was not to break the cryptography. They...