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What are some Threat Vectors / Attack Vectors of Zero Knowledge Proof (ZKP)?

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    $\begingroup$ This question seems unclear and overly broad. $\endgroup$
    – Maeher
    Nov 20, 2018 at 8:47
  • $\begingroup$ it is not broad. I wish to understand if there are any attack mechanisms $\endgroup$
    – Nathan Aw
    Nov 20, 2018 at 10:32
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    $\begingroup$ attack mechanisms on what? On arbitrary zero knowledge proofs? By definition, an arbitrary zero-knowledge proof is a generic one that does satisfy the appropriate security property - hence, one for which, by definition, there is no attack. Do you want a list of common attack on possible strategies for building ZKP? A list of the things one must be careful about when designing a ZKP? In both case, I agree with @Maeher that this is a very broad question, and it's not obvious to guess what exactly you want to know. Can you reformulate and give us more details about what you have in mind? $\endgroup$ Nov 21, 2018 at 1:01
  • $\begingroup$ stop marking down guys. this is an excellent qns. those who mark the question down is not helpful to a beginner like myself $\endgroup$
    – Nathan Aw
    Nov 21, 2018 at 9:22
  • $\begingroup$ Please, provide a bit more context, what you've looked at, what kind of zero knowledge proofs you're interested in, etc. $\endgroup$
    – Lery
    Nov 22, 2018 at 14:55

1 Answer 1

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In general there are different types of Threat Vectors or Attack Vectors like Brute-Force and Dictionary Attacks, etc. But regarding the Zero-Knowledge Proof, I got some information that are given below:

Attacks of Zero-Knowledge Proof:

  1. Impersonation – One entity pretends to be another.

  2. Replay – uses an impersonation involving use of information from a single previous protocol execution on the same or different verifier.

  3. Interleaving – an impersonation involving a selective combination of information from one or more previous protocol executions.

  4. Reflection – an interleaving attack involving sending information from an ongoing protocol execution back to the originator.

  5. Forced Delay – an adversary that intercepts a message and relays it later.

  6. Chosen-text – when an adversary chooses specific challenges in an attempt to gain information about the secret.

  7. The Grandmaster Problem (MitM attack)

  8. The Mafia problem

Disadvantages of Zero-Knowledge Proof:

  1. Limited – Translation might be necessary if secret is not a number.

  2. Lengthy – As it has almost 2k entity, it takes a lot of time to compute.

  3. Imperfect – The Intruder can still intercept the message (i.e. messages to the Verifier might be modified or destroyed)

  4. A zero-knowledge proof is only as good as the secret it is trying to conceal.

  5. Zero-knowledge proofs of identities in particular are problematic.

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  • $\begingroup$ @ Nathan : two more attacks are there: The Grandmaster Problem (MiM attack) and the Mafia problem which I now included in my answer. $\endgroup$
    – Anu Davis
    Nov 23, 2018 at 6:19

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