Instruktsiia Key Transformation -

Applying a cryptographic hash or a cipher-based transformation (e.g., using a salt or a specific constant).

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. instruktsiia key transformation

If you are following a technical manual with this title, it likely details these phases: this topic generally covers:

Formatting the initial "raw" key according to specific padding rules. instruktsiia key transformation

Depending on the specific field, this topic generally covers: