Enhance random source

[kim201212]

Random Spec.

• Link : https://github.com/ethereum/kzg-ceremony-specs/blob/master/docs/participant/participant.md#generating-randomness

Generating randomness

The randomness that each participant contributes to a set of Powers of Tau is in the form of an integer in the range (1, bls.r).

The participant MUST generate 4 different secrets from a cryptographically-secure pseudo-random number generator (CSPRNG) of their choosing.

Each secret MUST meet the following requirements:

• Sourced from a CSPRNG
• Contain at least 255 bits of entropy
• Be different from the other 3 secrets used in the other sub-ceremonies
• Be cleared from memory after the contribution is complete

Furthermore, each secret SHOULD meet the following requirements:

• Be uniformly distributed across $\mathbb{F}_r$. (i.e. avoid modulo bias with respect to bls.r).

KeyGen

A good method for meeting the above requirements would be to make use of the KeyGen function offered by all compliant BLS libraries. This function takes in a seed of at least 32 bytes and returns a uniformly sampled integer of $\mathbb{F}_r$.

Task

• [x] Generate randomness for each contribution
• [x] Receive seed words with a flag
• [ ] Apply mnemonic words

[rootwarp]

@kim201212 Please describe the spec of the random source. It could be helpful to debug together.

[rootwarp]

@kim201212 I know you have already done this issue, but what do you think expanding this issue by doing below?

https://github.com/dsrvlabs/czg-keremony/blob/f49341086590fed830d4b141c3785611c208a9f8/index.js#L142-L146

[kim201212]

@kim201212 I know you have already done this issue, but what do you think expanding this issue by doing below?

https://github.com/dsrvlabs/czg-keremony/blob/f49341086590fed830d4b141c3785611c208a9f8/index.js#L142-L146

That's a great idea!