Ability to add attachments and set access permissions per Project's Release

Currently it's only possible to attach files to individual JIRA issues.
It would be quite helpful it if were possible to add (attach) files also to individual Releases of a Project.
This would be good for archiving of product's binaries (executables, DLLs etc), source code, various release-related files etc.
Attachment security would be necessary as we want only certain groups of users access only certain attachments.