It would be extremely useful as occurs for example with the Google two-step process, if one could nominate devices as trusted for example my own iPad or my MacBook Air or my iMac desktop computer. Otherwise I am forced to rely completely on my single trusted device, my iPhone 5!
Once they are truted then I should be able to log on from these devices. I already have a Password manager which protects my log on details (LASTPASS)
MacBook Pro (15-inch Mid 2010), OS X Mountain Lion