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BDOC 1

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BDOC is a digital signature format developed in 2014 to replace the old DDOC (DigiDoc) digital signature format in Estonia. Compared to DDOC, an important modification is that a .bdoc file is in fact a ZIP container with the signed files, the signatures and the protocol control information and can be opened by any program that recognises the ZIP format.

Identify it

Extensions	`.bdoc`
MIME types	`application/vnd.bdoc-1.0`
PRONOM	`fmt/1340`
Wikidata	`Q28446959`

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Sources

From PRONOM, Wikidata. Updated 2026-10-20.

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