One of the obstacles to online engagement is the number of passwords your customers have to remember.
Using popular sites such as Facebook or Google to provide authentication services is one way to avoid forcing your users to create yet another login and password. However, science is looking for even better solutions: this video from Mashable describes a number of alternatives, the most notable being the use of the unique patterns of brain waves each of us has.
This has obvious advantages over fingerprint and retina scanning, as I am sure we've all seen films where the villains remove someone's finger or eyeball to gain access!
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