A hardware security key is a physical authentication device. Instead of proving identity with a text message or an app code, the user proves possession of a registered device. That matters because many modern attacks are designed to steal or relay temporary codes. Hardware keys are much harder to phish.

What a hardware key is not

A hardware key is not a fingerprint reader. It does not identify the user by scanning a biometric trait. Instead, it uses cryptographic proof. During setup, the site registers a public key associated with that specific device. During login, the device solves a challenge in a way only the matching key can.

Why this matters for lawyers

Email compromise is one of the clearest risks in legal practice. If a lawyer’s inbox is taken over, the attacker may gain access to privileged messages, client documents, password resets, or payment instructions. Hardware keys dramatically improve protection for the accounts that matter most.

What lawyers should do

• Use hardware keys for email, cloud storage, and admin accounts.
• Issue two keys per user: one primary and one backup.
• Store the backup securely and document recovery procedures.
• Reduce or disable weaker fallback methods where possible.

If a law firm wants the strongest mainstream form of login protection available today, hardware security keys belong near the top of the list.