Cryptography

Questions tagged [traitor-tracing]

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

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Generating traceable passwords

I'm new to cryptography, so please bear with me as I try to explain what's going in my head. I have an idea to write a program to generate one-time passwords for online conferences that are although ...
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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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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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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 ...