Can I prevent users from updating attachments?

[Tuelle]

Hi,

I am working in a regulated environment where I have to prevent unnoticed changes to Confluence pages. If I use an attached image in a page and the page has been officially approved, it must not be possible to change the content of the page by updating the attachment. 

Can I prevent updates to attachments through the permission scheme?

Or can I write a Java plugin that hooks into the upload process and cancels it if an attachment with the same name is already present? If yes, how?

Thanks

Thorsten

[AnnWorley]

You may prevent updates to attachments on approved pages by using page restrictions on the pages to restrict editing altogether, including the addition or deletion of attachments.

You may use space permissions to prevent deleting of attachments but as long as they have the Add attachments space permission, users may add updated versions of existing attachments.