Linking Patient Data Without Sharing Identities with HMAC, KMAC and Tokenisation. Keyed hashing lets a GP system, an acute trust and a community provider join their records on the same patient without any of them, or the analysts downstream, ever seeing each other's NHS numbers. That is the quiet workhorse behind most pseudonymised linkage in… Continue reading Return of the HMAC
The UK is trialling its Covid-19 contact tracing application which tracks human interactions. The app uses Bluetooth Low Energy (BLE) communications between smartphones for registering handshakes' duration and distance. This data is then uploaded to a centralised database so that if a user self-registers as Covid-19 positive, the centralised service can push notifications to all… Continue reading How do Covid-19 tracing apps work and how do they comply with EU-GDPR?