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An optimal code for patient identifiers.

Andreas Faldum1, Klaus Pommerening

  • 1Institut für Medizinische Biometrie, Epidemiologie und Informatik der Johannes-Gutenberg-Universität, D-55101 Mainz, Germany. faldum@imbei.uni-mainz.de

Computer Methods and Programs in Biomedicine
|May 13, 2005
PubMed
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This study introduces an optimal 8-character code using a 32-character alphabet to uniquely identify 1 billion individuals. The code offers robust error detection and correction, including adjacent character transpositions, enhancing data integrity.

Area of Science:

  • Computer Science
  • Information Theory
  • Data Security

Background:

  • Distinguishing large populations requires unique, error-resilient identifiers.
  • Existing identification systems may lack sufficient error detection/correction capabilities for sensitive data.
  • The German telematics platform for health research networks (TMF) requires robust pseudonymization services.

Purpose of the Study:

  • To develop an optimal identifier system capable of distinguishing 1 billion individuals.
  • To implement error detection and correction mechanisms within a short identifier.
  • To integrate this system into the TMF's pseudonymization service.

Main Methods:

  • Design of an optimal code over a 32-character alphabet.
  • Development of encoding and error-checking algorithms.

Related Experiment Videos

  • Implementation of algorithms within a pseudonymization service.

    • Main Results:

    • An 8-character identifier capable of distinguishing 1 billion unique individuals.
    • The code detects up to two errors and corrects single errors.
    • The code also corrects transpositions of adjacent characters.
    • Algorithms are freely available and integrated into the TMF pseudonymization service.

    Conclusions:

    • The proposed optimal code provides a highly efficient and reliable method for large-scale individual identification.
    • The error-correction capabilities enhance data integrity, crucial for health research networks.
    • The free availability and integration into TMF promote its adoption and utility.