Cybercrime: Hidden backdoors to enterprise data

The word “backdoor” is regularly used in conversation between enterprise IT security folk. Generally, this will involve speculation about the US Government calling on Linus Torvalds to code one into the Linux OS, for example. Occasionally, though, talk will turn to developer tools left in firmware or clever hackers finding unlikely routes into corporate networks via a printer or some other peripheral. But just how much of a threat are backdoors to your data, and what should you be doing to mitigate the risk?