Neural Noise- Secure wireless communication between brain–computer interface and smart devices can be enabled by space-time-coding metasurfaces.1
- Mind control of smart devices via such a link is of high relevance for near-term BCI user experience and security (Nature, implementation-oriented).1 1
Gardner updates
- Secure wireless communication between brain–computer interface and smart devices and mind control of devices are enabled by a space-time-coding metasurface (Nature). 1
Weekly enrichment (2026-07-20)
- The system is a brain space-time-coding metasurface (BSTCM) that deeply fuses SSVEP-based BCI visual-stimulation coding with programmable metasurface space-time coding at the physical layer, published in Nature Communications (DOI 10.1038/s41467-025-63326-0).2
- The metasurface is camouflaged as an LED stimulator, so the SSVEP flicker doubles as both the BCI visual stimulus and the electromagnetic information carrier, improving system compactness and reliability.2
- Security combines physical-layer security with cryptographic encryption: a message is split into two ciphertexts (visual stimulation keys) sent to two users over two independent harmonic-frequency channels, so neither channel alone reveals the secret.2
- In experiments, eavesdroppers (“Eve”) saw a bit error rate near 50% (no better than random guessing), and the system achieved a secrecy capacity of about 1.9 dB, validating the encrypted wireless link.2
- A proof-of-principle prototype demonstrated brain-intention control of multiple smart devices (LED/MCU-driven modules) without any physical interaction by the user.2
- The authors position BSTCM as a paradigm for secure human–machine interaction relevant to future 6G wireless communications and metaverse applications.2 3
- Clinical/BCI implication: encrypting BCI command channels at the physical layer addresses brain-data privacy and spoofing risks for assistive device control, especially for users who depend on hands-free operation.2