DES null key token
Table 1 shows the format for a fixed length DES null key token.
| Bytes | Description |
|---|---|
| 0 | X'00' (flag indicating this is a null key token). |
| 1–15 | Reserved (set to binary zeros). |
| 16–23 | Single-length encrypted key, or left half of double-length encrypted key, or Part A of triple-length encrypted key. |
| 24–31 | X'0000000000000000' if a single-length encrypted key, the right half of double-length encrypted key, or Part B of triple-length encrypted key. |
| 32–39 | X'0000000000000000' if a single-length encrypted key or double-length encrypted key. |
| 40–47 | Reserved (set to binary zeros). |
| 48–55 | Part C of a triple-length encrypted key. |
| 56–63 | Reserved (set to binary zeros). |