What kind of information in cryptography is called semantic information? I have been studying cognitive cryptography from this article. Its definition of cognitive cryptography is:


  Cognitive cryptography is a division of cryptography
  within which any information set can be secured using personal
  information contained in the biometric sets of information and
  semantic information unambiguously identifying individual features
  of protocol participants.


What does the following part of the definition mean? 


  ...semantic information unambiguously identifying individual features...


I don't understand what semantic information means. Specifically, what kind of information in cryptography is called semantic information?

I would greatly appreciate your assistance.
I'm not an expert but...

Semantic analysis is a concept not from cryptography but more from machine learning. The goal is for an AI to learn semantic information from some base set of inputs. For example we might train an AI to detect whether a arbitrary image contains a dog. 

For the purposes of encryption an AI might learn to recognize an individual from a camera, microphone, and/or other inputs. In this case the "semantic information" would be the individual's characteristics necessary for an AI to identify that person from such external data.