Passwords are past their prime. Users are buried under the weight of too many passwords, and most of us constantly struggle with these password conundrums: Simple passwords are easy to guess, but complex passwords are hard to remember. Writing passwords down means not having to remember them, but it also means they might get stolen. Sharing passwords between accounts means that if one account has a password database spill, all the accounts are compromised.
replaces passwords with mobile phones and replaces typing passwords with
scanning a barcode on that phone. The phone uses two-dimensional
barcodes to make a link between the user’s browser session and the
physical presence of the user, then utilizes the phone’s Internet
connection to send a long and complex shared secret to the web site to
prove the user is who he/she claims to be.
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