DocumentCode :
1228778
Title :
End-to-end security in the presence of intelligent data adapting proxies: the case of authenticating transcoded streaming media
Author :
Gentry, Craig ; Hevia, Alejandro ; Jain, Ravi ; Kawahara, Toshiro ; Ramzan, Zulfikar
Author_Institution :
DoCoMo Commun. Labs., San Jose, CA, USA
Volume :
23
Issue :
2
fYear :
2005
Firstpage :
464
Lastpage :
473
Abstract :
We consider the problem of maintaining end-to-end security in the presence of intelligent proxies that may adaptively modify data being transmitted across a network. The video coding community considers this problem in the context of transcoding media streams, but their approaches either fail to address authentication or fail to provide meaningful security guarantees. We present two provably-secure schemes, LISSA and TRESSA, that allow an intelligent network intermediary to intercept a stream signed by a content provider, and adapt it dynamically, while preserving the ultimate receiver´s ability to securely verify the content provider´s signature (and, hence, authenticity and integrity of the data received). Our schemes allow the intermediary to selectively remove portions of the stream and, thus, permit common media transcoding techniques such as scalable compression and multiple file switching. Moreover, a content provider only has to encode and sign its entire data stream once, as opposed to nondynamically encoding and signing different versions for each anticipated combination of device, network configuration, and channel condition. Our implementation results demonstrate efficiency.
Keywords :
digital signatures; intelligent networks; telecommunication security; transcoding; video coding; video streaming; LISSA; TRESSA; adaptive security; content providers signature; digital signatures; end-to-end security; intelligent network; intelligent proxies; linear multiplex scheme for simulcast authentication; media transcoding technique; multiple file switching; scalable coding; transcoded streaming media authentication; tree scheme for simulcast authentication; video coding community; Authentication; Communication switching; Computer aided software engineering; Data security; Digital signatures; Intelligent networks; Laboratories; Streaming media; Transcoding; Video coding;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.2004.839391
Filename :
1391050
Link To Document :
بازگشت