Cryptographic primitives are well-established, low-level cryptographic algorithms that are frequently used to build computer security systems. These routines include, but are not limited to, one-way hash functions and encryption functions.

Anthropology. of or pertaining to a preliterate or tribal people having cultural or physical similarities with their early ancestors: no longer in technical use.

Primitive can also be defined as simple, unsophisticated.

I need a separate category for efforts that are inspired by and may be predecessors of accepted cryptographic methods but are distinct in that they are intellectual exercises at best and are therefore a separate kind of animal than my predominately traditional cryptanalysis.