Panorama
To be frank, the category term Tertiary is a little inexact here.
Miscellaneous would have made a much better description; but ...
it's just a name.
Here, we will be teaching algorithms for Combination, Permutation, Selection with Repetition, Selection with Conditioned Repetition, Two Way Encryptions: Single Key Encryption and Private/Public Key Encryptions; and One Way Encryptions - Hashes.