Deception, concealment, camouflage. Nature's numerous examples of disguising as a strategy to survive have provided humankind with plenty of inspiration for military unobtrusiveness throughout history. Today, disguise appeals as a way to protect one's private life in the City with Eyes. In a time when monitoring and surveillance systems are increasingly pervasive, Monica Hutton reflects on concealment strategies that are being developed, and which agencies they can deploy as part of complex urban ecologies.