Engage is not limited to only printable characters for baseline key material. Rather, the software supports the full 256-bit range of binary data for BKM. For example, many encryption systems utilize passwords, passphrases, or PIN codes. This generally means that they need to be human-readable in some form and, therefore, printable. As Engage is not interacting directly with humans in this regard, the application using the Engage Engine can use any method appropriate to its use-case to obtain BKM from a user or from non-human entities such as provisioning systems.