AccessData Custom Content Image (Encrypted)
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The AccessData Custom Content Image (AD1) file format is a file-level disk image format created by AccessData's proprietary forensic software, such as FTK Imager. AD1 images may be encrypted or unencrypted. Encrypted images have only a small unencrypted chunk at the beginning of the file, beginning with the magic bytes "ADCRYPT" at byte 0.
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| Extensions | .ad1.ad2.ad3.ad4.ad5 |
|---|---|
| Signatures | 41444352595054 at byte 0 (AD1 (encrypted)) |
| PRONOM | fmt/843 |
| Wikidata | Q62484762 |
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From PRONOM, Wikidata. Updated 2026-10-20.