My query is what occurs if ECC is damaged or a cryptographically related quantum laptop arrives, will it be capable to uncover relationships between addresses in a pockets given a number of tackle belonging to a pockets?
If totally different public keys are youngsters derived from a sure father or mother public key (BIP-32 model), then given the father or mother private and non-private key and its chain code you possibly can calculate baby private and non-private keys. Nonetheless, with out the chain code it might be inconceivable to calculate as a result of the chain code is the HMAC key utilized in BIP-32.
However even should you get the chaincode for some motive, doing it the opposite approach round (recovering the father or mother key from its youngsters) wouldn’t be attainable with simply the youngsters private and non-private key since it might must reverse a HMAC-SHA512 (BIP-32)
For instance, will probably be capable of acquire the non-public keys of any revealed public key belonging to a selected pockets, would it not then be capable to derive the grasp non-public key of the pockets? Would it not be capable to 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 attainable to derive the grasp non-public key, since—as defined earlier—it’s inconceivable to calculate the father or mother keys. All the youngsters keys would even be safe so long as the attacker doesn’t have the chaincode to calculate the youngsters.
