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Thanks for asking.
RBIOKitHelper.kext has a valid Developer ID signature and is therefore, in Apple's terms "from a recognized developer".
Any change to the kext will, of course, render the code signature invalid and make the kext appear not to be "from a recognized developer".
[rant]
There's, unfortunately, a growing number of heavily advertised applications out there that promise "space savings" on one's harddrive/SSD by "removing unneeded 32 Bit code" or "removing unneeded files" when all they do is run free developer tools to strip binaries or simply delete folders inside application bundles that contain localizations for languages not used by the user. This, however, will break the signature of any code signed application, including the ones signed with an Apple Developer ID. Which in turn can make it impossible for a user to start or use an application. And even if one can still start an application following such "optimization", that application is no longer able to access items in one's keychain or offer network services, no matter what one sets in Keychain Access.app or in System Preferences.
My best advice, therefore is to simply stay away from any software that makes any such claims about "optimizing" one's software or harddrive. That software, in my book, is worse than anti-virus software and it wouldn't, in fact, surprise me in the least if their next step is try selling people software that helps "find defective software" on their system, charging premium dollars for a glorified user interface to running OS X' own codesign tool.
[/end of rant]
Here's how you can verify the integrity of RBIOKitHelper.kext on your system in Terminal.app (output on my system below).
1) Show details about the signature by entering
codesign -dvvv /System/Library/Extensions/RBIOKitHelper.kext
2) Check validity of the signature by entering
codesign -vvv /System/Library/Extensions/RBIOKitHelper.kext
$ codesign -dvvv /System/Library/Extensions/RBIOKitHelper.kext
Executable=/Volumes/Remote Buddy/Remote Buddy.app/Contents/Resources/Candelair.prefPane/Contents/Resources/RBIOKitHelper.kext/Contents/MacOS/RBIOKitHelper
Identifier=com.iospirit.driver.rbiokithelper
Format=bundle with generic
CodeDirectory v=20100 size=162 flags=0x0(none) hashes=1+3 location=embedded
Hash type=sha1 size=20
CDHash=51674fb0081050b6dd4187ee27778db81f3a599d
Signature size=4220
Authority=Developer ID Application: IOSPIRIT GmbH
Authority=Developer ID Certification Authority
Authority=Apple Root CA
Signed Time=26.11.2013 11:50:40
Info.plist entries=19
Sealed Resources version=1 rules=4 files=0
Internal requirements count=1 size=228
$ codesign -vvv /System/Library/Extensions/RBIOKitHelper.kext
RBIOKitHelper.kext: valid on disk
RBIOKitHelper.kext: satisfies its Designated Requirement
Best regards,
Felix Schwarz
