It can refer to a Key Transformation Function (KTF) , where a master key or passphrase is mathematically modified (transformed) into a specific session key. In Eastern European regulatory standards (like DSTU), these "instructions" define exactly how bit-shifting and XOR operations must be performed to meet legal security requirements.
Linking the new key to a specific user identity within a state or corporate registry. DIGITAL TECHNOLOGIES IN OPTIMIZATION OF THE ... - OUCI instruktsiia key transformation
Formatting the initial "raw" key according to specific padding rules. It can refer to a Key Transformation Function
If you are following a technical manual with this title, it likely details these phases: it likely details these phases: