I noticed that if you update the index (either via apt-get update or aptitude update) on Raspbian it looks like it doesn't download just the diff. but the whole index literally each time. Debian went about fixing it via having InRelease files which not only has diffs. as shared here https://wiki.debian.org/RepositoryFormat it also does the work of having a hash signature so you know that it's coming from Debian. Is something similar planned for this or not ?
Looking forward for info.