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.