Passkey Directory
Proton
Proton allows use of security keys as a multi-factor authentication option; TOTP must be enabled to use a security key.
MFA supportCommunication
Domains
proton.me
Also: proton.me
Last verified
Dec 10, 2025
Date when passkey support was last confirmed
Sign-in mode
MFA Only
Passkeys used as a second factor alongside password
Platforms
web
Notes
TOTP must be enabled to use a security key.
Documentation
Sources