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

• Generate randomness for each contribution
• 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?

czg-keremony/index.js

Lines 142 to 146 in f493410

	// TODO: Entropy
	// Some ideas.
	// Read standard mnemonic words and make users to choose some words.
	// Words that will provided on questions should be choosen randomly.
	// This function will gather answers and create entropy.

[kim201212]

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

czg-keremony/index.js

Lines 142 to 146 in f493410

	// TODO: Entropy
	// Some ideas.
	// Read standard mnemonic words and make users to choose some words.
	// Words that will provided on questions should be choosen randomly.
	// This function will gather answers and create entropy.

That's a great idea!