Authenticity techniques for PACS images and records

Stephen T. Wong, Marco Abundo, H. K. Huang

Research output: Contribution to journalConference articlepeer-review

19 Scopus citations


Along with the digital radiology environment supported by picture archiving and communication systems (PACS) comes a new problem: How to establish trust in multimedia medical data that exist only in the easily altered memory of a computer. Trust is characterized in terms of integrity and privacy of digital data. Two major self-enforcing techniques can be used to assure the authenticity of electronic images and text - key-based cryptography and digital time stamping. Key-based cryptography associates the content of an image with the originator using one or two distinct keys and prevents alteration of the document by anyone other than the originator. A digital time stamping algorithm generates a characteristic "digital fingerprint" for the original document using a mathematical hash function, and checks that it has not been modified. This paper discusses these cryptographic algorithms and their appropriateness for a PACS environment. It also presents experimental results of cryptographic algorithms on several imaging modalities.

Original languageEnglish (US)
Pages (from-to)68-79
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - May 12 1995
EventMedical Imaging 1995: PACS Design and Evaluation: Engineering and Clinical Issues - San Diego, United States
Duration: Feb 26 1995Mar 2 1995

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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