Traitor Tracing with Optimal Transmission Rate.
Nelly Fazio, Antonio Nicolosi and Duong Hieu Phan
Abstract:
We present the first traitor tracing scheme with efficient black-box traitor tracing in which the ratio of the
ciphertext and plaintext lengths (the transmission rate) is asymptotically 1, which is optimal. Previous constructions
in this setting either obtained constant (but not optimal) transmission rate [KY02b], or did not support black-box
tracing [CPP05]. Our treatment improves the standard modeling of black-box tracing by additionally accounting
for pirate strategies that attempt to escape tracing by purposedly rendering the transmitted content at lower quality.
Our construction relies on the decisional bilinear Diffie-Hellman assumption, and attains the same features of
public traceability as (a repaired variant of) [CPP05], which is less efficient and requires non-standard assumptions
for bilinear groups.
Ref: Proceeding of ISC '07 - 10th International Conference on Information Security, Lecture Notes in Computer Science Vol. 4779, pages 71-88, Springer-Verlag, 2008.
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