BioPassport Technical Implementation — DID, DPHR
Oct 6, 2023
DID in BioPassport uses one time pseudo-anonymous identifier for the user. Each DID is secured by a private key derived from HD key derivation. Public keys are stored into the BioPassport subchain, but the private keys are not. And SHA3–512 of the public key (with salt) will be used as a DID.
To provide DPHR to third parties, we provide “information transfer transaction(ITT)” in the BioPassport network. A User can tag the parts of her personal record/data set to provide, and those parts will be encoded using mECDH with the receiver, so only the receiver can check the data. We may provide any means of de-identification in the middle of this process. And if it is very sensitive data, we may add digital watermark to the data.
- DID:Decentralized identity
- DPHR:Decentralized personal health records
