Patent ID: 11943350
Assignee: COINBASE, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The method of claim 2, further comprising, before receiving the blockchain transaction to be signed:
generating the prior ciphertext from which the signing key shards were derived by encrypting the signing private key of the RuCK pair using the ceremony key;
splitting the prior ciphertext into a set of key shards that has a greater number of key shards than the key shard threshold, the set of key shards comprising the signing key shards and one or more other key shards;
encrypting each key shard of the set of key shards to a respective account manager;
generating at least a portion of the RuCK information;
providing the generated RuCK information and a public key of the RuCK pair to the online computer system operating within the online computing environment; and
deleting the signing private key of the RuCK pair, the prior ciphertext, and the signing key shards from the offline computer system (i) after providing the generated RuCK information and the public key of the RuCK pair to the online computer system and (ii) before receiving the blockchain transaction to be signed.