Multi-factor authentication (MFA) is one of the most effective security measures available, but not all MFA methods are created equal. If your organization still relies on SMS-based verification codes, it's time to upgrade.
The Problem with SMS-Based MFA
SMS codes were a good first step, but they have several known vulnerabilities:
- SIM swapping: Attackers convince mobile carriers to transfer your phone number to their device
- SS7 vulnerabilities: Flaws in the telecom signaling protocol can allow interception of SMS messages
- Social engineering: Attackers trick users into sharing their SMS codes
- Malware: Mobile malware can intercept SMS messages on compromised devices
Better Alternatives
1. Authenticator Apps
Apps like Microsoft Authenticator, Google Authenticator, or Authy generate time-based one-time passwords (TOTP) directly on your device. Benefits include:
- Codes are generated locally — not transmitted over cellular networks
- Immune to SIM swapping attacks
- Work without cellular service
- Many support push notifications for easier use
2. Hardware Security Keys
Physical keys like YubiKey or Google Titan provide the strongest form of MFA available:
- Phishing-resistant — the key verifies the website's identity
- No codes to intercept or share
- Works via USB, NFC, or Bluetooth
- Virtually impossible to remotely compromise
3. Biometric Authentication
Fingerprint readers, facial recognition, and iris scanning offer convenient and secure authentication:
- Unique to each individual
- Can't be shared or stolen like passwords
- Fast and convenient for users
- Built into all HP EliteBook devices on NPC Data Guard plans
MFA Best Practices
- Require MFA for all accounts, not just email
- Use the strongest MFA method each service supports
- Register backup MFA methods in case primary methods fail
- Train employees on how to use MFA properly
- Never share MFA codes with anyone, even IT support
Making the Switch
Transitioning from SMS to stronger MFA doesn't have to be disruptive. Start by enabling authenticator apps alongside SMS, then gradually phase out SMS as users become comfortable with the new methods.
All NPC Data Guard devices include built-in biometric authentication. Combined with our security policies that enforce MFA across all applications, your team gets strong authentication without the hassle. Learn more about our security features.