Switch to Protonmail Reason #25: Get a warning when a trusted contact's encryption key changes unexpectedly

A changed key can be legitimate, but it deserves attention before confidential mail goes out.

Why this matters

A changed key can be legitimate, but it deserves attention before confidential mail goes out. Privacy is easier to defend before this information is collected than after it has spread.

The protection

Proton's contact verification and key transparency features help surface unexpected key changes.

Take action

Pause and confirm the change directly with the person. Do not dismiss a warning just to send faster. Email protection depends on the route and settings. Ordinary mail involving outside providers is not automatically end-to-end encrypted, and email metadata is not universally hidden.

Sources

Proton key transparency, Proton encryption lock icons.