== Let's decide on the fundamental definition.. == 

 I agree with the user above ("How Trojans Work") in that this article contradicts itself on the basic characteristics of a trojan. I would like to offer a discussion before any significant edits are made. 

 Basically, it's unclear whether or not a trojan must include a backdoor as part of its payload. I would argue that the backdoor element would be one possible payload out of the many suggested, and malware which had an effect other than planting a backdoor or vulnerability (e.g. deleting files) would still be a trojan if it did so by misleading the user (appearing to have a desirable function). 

 As such, I suggest that the opening definition be clarified to at least make it clear that the backdoor element is not mandatory. 

 Anyone disagree?