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Table 1 Method of operation

From: A proposed architecture and method of operation for improving the protection of privacy and confidentiality in disease registers

Notation
PTj Patient j
HCPi Health Care Provider i
ITA Identifier Translation Agency
PR Population Register
DRi Disease Register i
NHEPID Personal identifying deatils for a Notifiable Health Event
NHEMED Medical details for a Notifiable Health Event
{NHEPID}KPR NHEPID encrypted with the public key of PR
{NHEMED}KDRi NHEMED encrypted with the public key of DRi
N A nonce (number-used-once)
prlu() Population Register look-up, returns a PRID
PRID Population Register ID number
italu() Identifier Translation Agency look-up, returns a PDRID
drlu() Returns the name of a Disease Register, given a nonce
PDRID person/Disease Register-specific ID number
drup() Updates a Disease Register database with the NHEMED for a particular PDRID.
Protocol
1. PTj → HCPi : NHEPID,NHEMED
2. HCP → ITA : {{NHEPID}KPR,{NHEMED}KDRi }KITA
3. ITA → PR : {{NHEPID}KPR, N}KPR
4. PR : PRID = prlu(NHEPID)
5. PR → ITA : {PRID,N}KITA
6. ITA : PDRID = italu(PRID, drlu(N))
7. ITA → DRi : { PDRID,N,{NHEMED}KDRi }KDRi
8. DRi : drup(PDRID,N,NHEMED)
  1. This table should be read in conjunction with the commentary provided in the text.