After xyz and proxima investigated more into the f00d processor and its tasks, they 'stumbled' upon a neat trick with which they were basically able to bruteforce the secret key used for backup crypto operations! Of course said key is different for each individual (for each PSN account to be exact) and couldn't just be shared. So you will still need a hacked Vita to first obtain your personal key and this is where yifanlu's tools come in handy.
If you are interested in cryptography and AES-256 rings a bell, you definitely should read yifanlu's blog post where he was kind enough to share the way it was done in every detail. https://yifan.lu/2017/02/19/psvimgtools-decrypt-vita-backups/
Once again, for the more technical interested readers here is the detailed explanation for what each tool does but in the short version we will be able to extract, modify, repack and reinstall backups on every firmware and probably most firmwares to come!
For end users this will once again allow some neat tricks like enabling the whitelist hack for PSTVs, X/O button swapping, ePSP Homebrew, PackageInstaller, Custom Themes and probably even more in the future. Furthermore, and what is interesting for all researchers and exploit hunters out there, this is a great thing as this will allow some new attack points to tamper with regarding the filesystem.
Downloads & more
Key Generator: http://cma.henkaku.xyz/
Tutorials & Guides Compilation
[Tutorial] How to install an ARK-2 eCFW bubble on PS Vita 3.63 (video)
Frequently Asked Questions
Can I get banned for this?!