Robust and efficient authentication of video stream broadcasting

Gabriele Oligeri, Stefano Chessa, Roberto Di Pietro, Gaetano Giunta

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We present a novel video stream authentication scheme which combines signature amortization by means of hash chains and an advanced watermarking technique. We propose a new hash chain construction, the Duplex Hash Chain, which allows us to achieve bit-by-bit authentication that is robust to low bit error rates. This construction is well suited for wireless broadcast communications characterized by low packet losses such as in satellite networks. Moreover, neither hardware upgrades nor specific end-user equipment are needed to enjoy the authentication services. The computation overhead experienced on the receiver only sums to two hashes per block of pictures and one digital signature verification for the whole received stream. This overhead introduces a provably negligible decrease in video quality. A thorough analysis of the proposed solution is provided in conjunction with extensive simulations. © 2011.
Original languageEnglish (US)
JournalACM Transactions on Information and System Security
Issue number1
StatePublished - May 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • General Computer Science


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