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I seem to remember Google offering something very similar to this that relied on scanning a QR-code on a known device? (I could be mixing stories though)

• brennenHN 14y ago
  You're right. Google had an "Open Sesame" project a while ago that used a QR code on top of a password to make logging in more secure. Doing both was just an extra pain and users didn't enjoy it, so they gave up on it.
  • angryasian 14y ago
    so based on that information, you're thinking the combination of the two was the major pain point ?
    • brennenHN 14y ago
      We've actually done a lot of consumer research and there are a few things that we think made the Open Sesame project uninteresting to consumers. The first is that it was too early and too few people had smartphones, the second is that it only increased complexity for security, and the third is that it was replaced by the SMS message as second-factor which was more broadly available and more easily understood.