I found this on ubuntu documentation, community help wiki.
As much as I support any move to a much needed method of secure BIOS handover to OS, and have recently adopted UEFI SecureBoot on Win8.1 myself, It's clear the whole implementation has been a mess the whole way through, almost reflective of the partially abandon TPM technology.
It's sad because like many others, I want to see these technologies to be as awesome as they should and could be ..but due to the underdeveloped and poorly executed implementation (of these two technologies in particular), due to many contributing factors such as market share power struggles, "higher powers" with their own agenda's, plain old communication breakdown and cooperation between hardware vendors and software developers, and uncertainty about how different OEMs will implement SecureBoot with different Linux distributions taking distinctly different approaches to supporting the technology. These technologies are nowhere at they standard they were intend to be at and not nearly as effective as they ought to be! Both have documented vulnerabilities and proof of concept exploits and it is everybody who uses and relies on modern technology who has to accept the sub-quality produce for what it currently is.
UEFI+SecureBoot (and TPM technology) have so much potential and I truly hope something much more effective and useable can come of them... but I digress, and unfortunately to use UEFI+SecureBoot with Win 8 and Linux it seems it may be complicated road to travel with so far limited testing, compatibility/stability and support.
All in all, I hope OP can derive the desired outcome
