iris

Great question! The short answer is no. However, FROSTR is a very interesting way to have multi-sig for Nostr signing. However, each key shard is still kept hot. These are not child-keys so much as portions of a full key that are split apart so that it takes a quorum of the parts in order to sign. This is being used in Njump's new onboarding tool announced here: nostr:
The way it is implemented, signing requests are sent to the key-shard custodians via NIP-46 and are automatically approved. Pretty cool idea, but not an answer to the key management problem entirely.
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