File Content Extraction 26.3
Filter SDK C++ Programming Guide

# secure

Returns whether the subfile is secured and credentials (such as a password) are required to extract it.

This information is available only for subfiles of ZIP, RAR, and PDF containers, and subfiles of containers handled by the `multiarcsr` reader.

## Syntax

    bool secure() const;

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Version 26.3 | Last updated July 2026

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Product: File Content Extraction 26.3

Topic Title: secure