The page you linked to doesn't contradict what I wrote. It does suggest that a common usage of the term "security by obscurity" can mean security ONLY by obscu

The page you linked to doesn't contradict what I wrote. It does suggest that a common usage of the term "security by obscurity" can mean security ONLY by obscurity. Which I made clear was not my usage. The other mis-use of the term is the opposite overreaction is to forget that obscurity does remain an indispensable component of practical security. Its most common form being as a password (or biometric) used to unlock an otherwise impenetrable (for practical purposes) system. Without an obscured backdoor (password, biometric, ...) the an otherwise completely secure system would not even be accessible to its owner.