Summary
Objectives:
Compiling individual records coming from different sources is necessary for multi-center
studies. Legal aspects can be satisfied by implementing anonymization procedures.
When using these procedures with a different key for each study it becomes almost
impossible to link records from separate data collections.
Methods:
The originality of the method relies on the way the combination of hashing and enciphering
techniques is performed: like in asymmetric encryption, two keys are used but the
private key depends on the patient’s identity.
Results:
The combination of hashing and enciphering techniques provides a great improvement
in the overall security of the proposed scheme.
Conclusion:
This methodology makes stored data available for use in the field of public health,
while respecting legal security requirements.
Keywords
Security - patient identification - encryption - hashing
