Review RAND seeding on BLS batch verify

[dapplion]

If producing safe random seeds in NodeJS is proven to be expensive consider this approach from Nimbus:

Each verify calls is seeded with a CSPRNG.
Then for all points included in the verify call we SHA256 the current blinding state and use the low 64 bits as a random blinding scalar ( ctx.secureBlinding.bls_sha256_digest(ctx.secureBlinding))

https://github.com/status-im/nim-blscurve/blob/fd4956f5d65129e9b475e654903a84303395eb92/blscurve/blst/blst_min_pubkey_sig_core.nim#L517

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 15 days if no further activity occurs. Thank you for your contributions.

[dapplion]

Not observed to be a performance issue