Do I need '_DataSpaces' in Excel's file encryption process?

jh.ryu 0

→ The picture above shows the result of unpacking after performing integrated encryption through the Office program.

→ The picture above is the result of unpacked after encrypting through the source I wrote.

In the above two cases, there was a difference of _DataSpaces, what is the role of the file and is it necessary?Also, how can I implement it if necessary?

Viorel 117K Reputation points

2024-08-07T07:57:47.02+00:00

It looks like a folder. Is it empty?
jh.ryu 0 Reputation points

2024-08-07T08:00:18.32+00:00

Oh sorry for the lack of explanation, the screenshot is the result of decompressing the .xlsx file by changing it to .zip, but it's actually structured like the picture below

Attaching related documents

https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-offcrypto/51a47a05-73a2-4e2b-b7ee-f7b4bcb8876d
jh.ryu 0 Reputation points

2024-08-07T08:00:45.84+00:00

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Tom Jebo 1,996 Reputation points Microsoft Employee

2024-08-08T18:15:17.9266667+00:00

Hi jh.ryu,

Thanks for your question about Excel encryption. One of the Open Specifications team members will respond shortly to assist you.

Best regards,
Tom Jebo
Microsoft Open Specifications Support
Mike Bowen 1,781 Reputation points Microsoft Employee

2024-08-08T23:09:40.7366667+00:00

Hi jh.ryu,

When you encrypt a file with your source, does Excel have any problems with the file?

Best regards,

Michael Bowen

Microsoft Open Specifications

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Do I need '_DataSpaces' in Excel's file encryption process?

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