Rails - Mar 2006 - validating code for security issues

I am having a few RoR apps developed by a programmer. They deal with 
private information and I want them to be very secure.

I have confidence in my programmer but nobody is perfect. :)

Is there any company that specialises in checking this type of code for 
stuff that could be a security leaks?

They are not very complex apps.

Thanks,
NK

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