My query is what occurs if ECC is damaged or a cryptographically related quantum laptop arrives, will it be capable of uncover relationships between addresses in a pockets given a number of handle belonging to a pockets?
If totally different public keys are kids derived from a sure dad or mum public key (BIP-32 fashion), then given the dad or mum private and non-private key and its chain code you possibly can calculate youngster private and non-private keys. Nonetheless, with out the chain code it might be unattainable to calculate as a result of the chain code is the HMAC key utilized in BIP-32.
However even if you happen to get the chaincode for some cause, doing it the opposite approach round (recovering the dad or mum key from its kids) wouldn’t be doable with simply the youngsters private and non-private key since it might have to reverse a HMAC-SHA512 (BIP-32)
For instance, will probably be capable of receive the non-public keys of any revealed public key belonging to a specific pockets, wouldn’t it then be capable of derive the grasp non-public key of the pockets? Wouldn’t it be capable of attribute different public keys to the identical pockets?
If a quantum laptop can derive the non-public key from a given public key, it might nonetheless not be doable to derive the grasp non-public key, since—as defined earlier—it’s unattainable to calculate the dad or mum keys. All the youngsters keys would even be safe so long as the attacker doesn’t have the chaincode to calculate the youngsters.
