MS Office XML rsid information leaks metadata about how a particular document was edited

https://msdn.microsoft.com/en-us/library/office/documentformat.openxml.wordprocessing.previoussectionproperties.rsidrpr.aspx

Microsoft's documentation (linked above) describes the rsidrpr as:

a unique identifier used to track the editing session when the physical character representing this section mark was last formatted.

see also Brian Jones' blog about RSIDs: https://blogs.msdn.microsoft.com/brian_jones/2006/12/11/whats-up-with-all-those-rsids/.

It appears that these "revision session IDs" are contained in word/document.xml as attributes of the form w:rsidP, w:rsidRPr, and w:rsidRDefault

This leaks information about how the document was created, and which things came from which authors. These references should probably be stripped.

changed the description

note that these revision session ids also show up in several other member files, sometimes in different ways. searching through the unpacked file for rsid gives pointers.

assigned to @jvoisin

added information leak label

changed milestone to %0.4.0 - Dolphin

Can you share any file having those markers/properties?

added good first issue label

I've attached testing.docx, which contains these rsids. the first line ("monkey monkey") was made in one editing session, and the second line ("bananas") was made in a second editing session.

both editing sessions were done with a clean, up-to-date installation of MS Word from Office 2010.

This should be implemented in !14 (closed)

Done in 174d4a0a

closed