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Commit b4edd6d2 authored by jvoisin's avatar jvoisin
Browse files

Document that MAT2 not being able to detect metadata doesn't mean that the file is clean

parent bd357b85
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......@@ -44,7 +44,7 @@ $ python3 -m unittest discover -v
# How to use MAT2
usage: mat2 [-h] [-v] [-l] [-c | -s | -L] [files [files ...]]
usage: mat2 [-h] [-v] [-l] [-s | -L] [files [files ...]]
Metadata anonymisation toolkit 2
......@@ -55,15 +55,24 @@ optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-l, --list list all supported fileformats
-c, --check check if a file is free of harmful metadatas
-s, --show list all the harmful metadata of a file without removing
-L, --lightweight remove SOME metadata
# Notes about detecting metadata
While MAT2 is doing its very best to display metadata when the `--show` flag is
passed, it doesn't mean that a file is clean from any metadata if MAT2 doesn't
show any. There is no reliable way to detect every single possible metadata for
complex file formats.
This is why you shouldn't rely on metadata's presence to decide if your file must
be cleaned or not.
# Related software
- The first iteration of [MAT](http://mat.boum.org)
- The first iteration of [MAT](https://mat.boum.org)
- [Exiftool](https://sno.phy.queensu.ca/~phil/exiftool/mat)
- [pdf-redact-tools](https://github.com/firstlookmedia/pdf-redact-tools), that
tries to deal with *printer dots* too.
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