You probably meant "this is tantamount". Otherwise, I don't understand what you're saying. Are you claiming the backdoor already exists, or that it does not?
Parent was asking a question, "is this not tantamount to x?" With the expected answer being "no, this is not not tantamount to x" which reduces to "yes, this is tantamount to x."
In this case, the intended answer/conclusion/implication is "yes, this is."
