ADOC is a document file created by application developed by Authentica for securing documents generated with Microsoft Office tools. ADOC format was popular business solution during the first decade of 21st century, but later replaced by more modern solutions.

ADOC files were fully compatible with Microsoftu Office. User with enough access privilege can track all the changes made to given document, including content modifications, change access permissions for selected users, or add custom watermarks to documents.