Guardrails: secure Rails apps by source translation (guardrails.cs.virginia.edu)

Guardrails is a nice technique for adding security to Rails apps. You tag data items with access conditions and guardrails does a source translation in the background to ensure the data is protected accordingly.

Alpha version of the code is now on github:

https://github.com/guardrails/guardrails

Slides describing its design (paper to be presented later this year at USENIX WebApps 2011):

http://www.owasp.org/images/c/cd/Guardrails_owasp_final.pdf

Seems a little overkill, when you can do the same things with: https://github.com/stffn/declarative_authorization