Secure transcoding of internet content

Yuan-Chi Chang, Richard Han, Chung-Sheng Li, John R. Smith

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

7 Citations (Scopus)


In this paper, we introduce a secure transcoding framework that enables network intermediaries such as proxies to transcode multimedia data without violating end-to-end security guarantees. In our approach, an encoder decomposes a data stream at the source into multiple streams, encrypts each stream independently, and annotates each stream with clear-text metadata. An intermediary performs transcoding by prioritizing the data streams based only on the clear-text metadata, and then dropping lower priority streams. The destination can then decrypt the remaining received streams and recombine them into the transcoded output stream. Our solution offers true end-to-end security since there is no decryption and re-encryption of the data stream midway. As a result, the proxy/intermediary may employ compression-based transcoding of encrypted multimedia data to improve speed of delivery over slow access links without having to decrypt the data.
Original languageEnglish
Title of host publicationProceedings of the 6th Joint Conference on Information Science
EditorsH. John Caulfield
Place of PublicationNew York, NY
PublisherAssociation for Computing Machinery, Inc
Number of pages4
ISBN (Print)0970789017, 9780970789013
Publication statusPublished - 2002
Externally publishedYes
EventJoint Conference on Information Sciences (6th : 2002) - Research Triangle Park, United States
Duration: 8 Mar 200213 Mar 2002


ConferenceJoint Conference on Information Sciences (6th : 2002)
Country/TerritoryUnited States
CityResearch Triangle Park


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