Microsoft Access Encrypted Database File 1.0
Unknowndatabase
Microsoft Access Database File, formerly known as Jet MDB Database format, is propriatory file format developed and used by Microsoft as a native format for its Microsoft Access (formerly Microsoft Jet Database Engine) desktop database management system. First released in 1992, starting with version 1.0 the earlier versions of the database used the Jet Database Engine, with version 1.0 having a maximum size of 128 megabytes, then increasing to 1 gigabyte with versions 1.1 and 2.0. Microsoft Access also allowed for "encrypting" a database, described as: "Encrypting a database compacts the database file and makes it indecipherable by a utility program or word processor. Decrypting a database reverses the encryption." Encrypted files have a common header with a version byte at the same offset as unencrypted files. This entry records the encrypted files of version 1.0 of MDB file format. For a full list of versions please follow the links provided in the Notes section.
Identify it
| Extensions | .mdb.mda |
|---|---|
| Signatures | 772c5320 at byte 0 (Microsoft Access Encrypted Database File v1.0) |
| PRONOM | fmt/1807 |
| Wikidata | Q117456796 |
| Library of Congress | fdd000462 |
Not sure your file is this? Identify it from its first bytes, in your browser.
Open it
- PhotoRecOpen source
Convert it
No conversion recorded. One of the tools above may export it; search for a chain.
0Sources
From PRONOM, Wikidata. Updated 2026-10-20.