Questions tagged [traitor-tracing]

Traitor tracing describes an ability of specific cryptographic schemes that helps trace the source of leaks.

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Amazon's anti-piracy: how many movies can $m$ conspirators leak?

Is there any existing academic literature about this application of traitor tracing? A video streaming service has a new anti-piracy technique to identify customers who capture and share their ...
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Is it possible to convert a selective secure broadcast encryption scheme to an adaptive secure broadcast encryption scheme?

I was reading the paper, entitled "Multiparty Key Exchange, Efficient Traitor Tracing, and More from Indistinguishability Obfuscation", by Boneh et al. On page 23, the authors have claimed ...
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Asymmetric encryption, multiple recipients, traitor must share private key

Is there an asymmetric encryption scheme, or public-key encryption, where multiple recipients can access the data, but in order for one of the recipients to leak the key to the data, they would need ...
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1answer
134 views

Traitor tracing - codeword properties

Let $c ≥ 2$. A code $C ⊂ Q^n$ is a $c$-frameproof code if for any set $X ⊂ C$ with $|X| ≤ c$ we have desc$(X) ∩ C = X$. Thus the only codewords that a coalition of up to $c$ pirates is capable of ...
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1answer
82 views

Traitor tracing - determining a set of codewords

I am reading some notes and having trouble understanding the following example: Let $F$ be a finite set of size $q$, where $q ≥ 2$. Let $n$ be an integer, where $n ≥ 2$. For a subset $X ⊆ F^n$ of ...
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How do I prove the tracing part in a ring signature model?

I have a question about the article “efficient and multi-level privacy-preserving communication protocol for VANET” by H. Xiong et al. I need the ID of malicious vehicle, but I could not prove how I ...
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1answer
320 views

Traitor-tracing PRF

I'm looking for a pseudorandom function (PRF) with "traitor-tracing" properties. More specifically, I'd like there to be multiple equivalent keys, so I can give different parties different keys, but ...