Kodex automatically generates and manages all relevant transformation parameters (e.g. cryptographic keys for the pseudonymization) for you. It can vary these parameters based on attributes of data items or external values (e.g. the current time) and rotate them automatically based on a fixed or dynamic schedule. Parameters are linked to data items and stored with their transformation configurations in an append-only fashion so that every single transformation can be tracked, audited and possibly reverted (which is only possible for reversible transformations like cryptographic pseudonymization).
Kodex also supports different parameter stores and even enables you to write your own, making it possible to e.g. keep parameters locally in a file or store them in a central database.