However, researchers have found out that it is still not perfect and prone to hack attacks.
Whats more, hackers can use your Facebook profile photos to hack such systems, researchers said.
You cant generally control your online nearness or your online picture.
Some vendors most notably Microsoft with its Windows Hello software already have commercial solutions that leverage alternative hardware.
[In Hellos case, that hardware is Tobiis eye-tracking camera.]
The researchers have explained their method and results in their full paper that was published onWired.
source: www.techworm.net