Probably, that's the first result I got when googling "crystallographic primitive", my comment problem makes more sense reading it as "cryptographic primitive"

Probably, that's the first result I got when googling "crystallographic primitive", my comment problem makes more sense reading it as "cryptographic primitive" :). Unfortunately, primitive cells seem mathy enough to be plausibly to cryptography for that to be a confusing mistake (especially given the existence of lattice based cryptography).