The following table describes the AMD Zynq™ 7000 SoC Authentication Certificate Header.
| Bit Offset | Field Name | Description |
|---|---|---|
| 31:16 | Reserved | 0 |
| 15:14 | Authentication Certificate Format | 00: PKCS #1 v1.5 |
| 13:12 | Authentication Certificate Version | 00: Current AC |
| 11 | PPK Key Type | 0: Hash Key |
| 10:9 | PPK Key Source | 0: eFUSE |
| 8 | SPK Enable | 1: SPK Enable |
| 7:4 | Public Strength | 0:2048 |
| 3:2 | Hash Algorithm | 0: SHA256 |