A method of activating content (193, 593), the method comprising: enabling an electronic device (110, 210) to access an authentication agent (180, 580); obtaining, by the device (110, 210), a digital representation (141, 241, 341) of an interaction with a physical environment (100, 200) comprising a plurality of physical objects (120A, 120B, 220, 230, 349A, 349B, 349C); discriminating at least two different objects from the plurality of physical objects (120A, 120B, 220, 230, 349A, 349B, 349C) in the environment (100, 200) as a first valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C) and a second valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C) based on the digital representation (141, 241, 341); and deriving a first set of authentication features (160, 260, 360, 460) from the digital presentation (141, 241, 341) and associated with the first valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C), and a second set of authentication features (160, 260, 360, 460) from the digital presentation (141, 241, 341) and associated with the second valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C); characterized in that the method further comprises: establishing, by the authentication agent (180, 580), a content access level (183, 583) as a function of a juxtaposition (470, 570) of the first set of authentication features (160, 260, 360, 460) with respect to the second set of authentication features (160, 260, 360, 460), wherein the juxtaposition (470, 570) is determined based on at least relative time information; activating, by the authentication agent (180, 580), content (193, 593) based on the content access level (183, 583); and configuring an output device to present the content (193, 593) according to the content access level (183, 583). enabling an electronic device (110, 210) to access an authentication agent (180, 580); obtaining, by the device (110, 210), a digital representation (141, 241, 341) of an interaction with a physical environment (100, 200) comprising a plurality of physical objects (120A, 120B, 220, 230, 349A, 349B, 349C); discriminating at least two different objects from the plurality of physical objects (120A, 120B, 220, 230, 349A, 349B, 349C) in the environment (100, 200) as a first valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C) and a second valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C) based on the digital representation (141, 241, 341); and deriving a first set of authentication features (160, 260, 360, 460) from the digital presentation (141, 241, 341) and associated with the first valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C), and a second set of authentication features (160, 260, 360, 460) from the digital presentation (141, 241, 341) and associated with the second valid authentication object (120A, 120B, 220, 249, 349A, 349B, 349C); characterized in that the method further comprises: establishing, by the authentication agent (180, 580), a content access level (183, 583) as a function of a juxtaposition (470, 570) of the first set of authentication features (160, 260, 360, 460) with respect to the second set of authentication features (160, 260, 360, 460), wherein the juxtaposition (470, 570) is determined based on at least relative time information; activating, by the authentication agent (180, 580), content (193, 593) based on the content access level (183, 583); and configuring an output device to present the content (193, 593) according to the content access level (183, 583). establishing, by the authentication agent (180, 580), a content access level (183, 583) as a function of a juxtaposition (470, 570) of the first set of authentication features (160, 260, 360, 460) with respect to the second set of authentication features (160, 260, 360, 460), wherein the juxtaposition (470, 570) is determined based on at least relative time information; activating, by the authentication agent (180, 580), content (193, 593) based on the content access level (183, 583); and configuring an output device to present the content (193, 593) according to the content access level (183, 583).