@divVerent When closed source software is assessed for security by respectable bodies, the source code is provided to them for the assessment.
Security is nothing more than an illusion. Safes are rated by the amount of time it takes for a professional safecracker to get in. I would be tempted to say that the same idea should be used for software but that implies that the hardware doesn't come with God Mode for governments.
Security is only better with FLOSS in theory. I do have to admit that making all the source code available to the public and still having the reputation for being more secure would imply something. This is mostly irrelevant in an age where it is known that the USA had hardware backdoors in most of the world's computers and it wasn't detected.