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Comparative Analysis of Multi-Factor Authentication Methods for Hong Kong Enterprises

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Abstract

This paper provides a comprehensive comparison of six multi-factor authentication (MFA) methods — SMS codes, authenticator apps, hardware tokens, biometric verification, FIDO2 passkeys, and certificate-based authentication — evaluated across security strength, user experience, cost, and implementation complexity.

1. Evaluation Framework

We assessed each method against four dimensions: resistance to phishing, user adoption rate, total cost of ownership (3-year), and integration complexity with existing identity systems.

2. Results

Method Phishing Resistance User Adoption 3-Year Cost Integration
SMS Codes Low High Low Easy
Authenticator Apps Medium Medium Low Easy
Hardware Tokens High Medium High Medium
Biometric High High Medium Medium
FIDO2 Passkeys Very High Medium Medium Hard
Certificate-Based Very High Low High Hard

3. Recommendations

For Hong Kong enterprises, we recommend a tiered approach: FIDO2 passkeys for high-risk systems, biometric authentication for general corporate access, and authenticator apps as a baseline minimum.