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Episode 250: What's the Deal with Hash Functions?
Zero Knowledge
Poseidon - Is There a Risky Parameter Choice?
Poseidon is a framework working with arbitrary finite fields and they implemented for a known instance of Poseidon this specific finite field is number of rounds. Some people do customize their new design to work with different parameters which gives them some assurance that they're doing the right thing but we've seen some even in Poseidon some small mistakes like you know getting the matrix vector product incorrectly or things like this.
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