What would you like to do? Thumbnail sketch: Two-factor (Yubikey or Google Authenticator) protected wallets Computer. Shared-secret authenticator (Yubikey/Google Authenticator/etc). Server (possibly shared with millions of other users). Motivating use case setup: User creates a split (2-of-2 multisig) wallet on the computer and server.
Get via App Store Read this post in our app! Which Two-factor authentication methods are available at which exchanges? I see that Mt. Gox now supports the Google Authenticator app (on Android, iOS – iPhone, iPad, iPod Touch, and on Blackberry) for 2-factor authentication (in addition to support for Yubikey, of course).