Why Walmart filed a patent for blockchain, wearables and EHR data

Walmart’s ongoing investigation of blockchain technologies seems to have intersected with its growing interest in joining the healthcare space, according to a patent application released earlier this week by the US Patent and Trademark Office. According to the document, which was filed in December, the retail giant is seeking to protect a method that allows a patient���s EHR to be obtained from a blockchain database even if they are unable to communicate. Doing so would require verification from two different keys: a public key stored in a wearable that would be scanned by emergency responders via RFID, and a private key that is obtained by scanning a biometric signature from the patient.