Abstract: Authentication of a user device, and/or associated user, to a system is a key component of many systems whereby access is restricted to only authorized personnel. Spatial challenges require a user, as determined by at least a sensor of a user device, to perform a particular spatial action. A sensor in the user device provides output signals and, if the output signals are associated with compliance with the spatial challenge, authorization to access a secured asset may then be granted.

Abstract: Social media websites provide a means for individuals and enterprises to sell goods and services. Managing such social media websites is provided whereby a user, a client of the social media website, may post social media content adorned with indicators associated with a transaction for an item identified by the adornment. The adornment comprises human-readable (or perceivable) elements to identify to a viewer of the social media content that the item is available for a transaction and machine-readable elements operable to receive a user's input and initiate a transaction associated with the item. The social media content and adornments may be hosted on the same social media site or distributed across a plurality of resources.