The rise of brain-reading technology

Prototype brain–computer interfaces have helped paralysed people to speak in their own voices, type at unprecedented speeds and walk smoothly. And companies are working on wearable brain-reading products that aim to help users to control their mental state or to interact with computers. Beyond the hype, researchers are well-aware of the risks: from the spectre of big-brother brain surveillance to the commodification of “the sanctuary of our identity”.