My query is what occurs if ECC is damaged or a cryptographically related quantum pc arrives, will it be capable to uncover relationships between addresses in a pockets given a number of deal with belonging to a pockets?
If completely different public keys are youngsters derived from a sure guardian public key (BIP-32 model), then given the guardian private and non-private key and its chain code you’ll be able to calculate youngster private and non-private keys. Nonetheless, with out the chain code it could be inconceivable 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 motive, doing it the opposite approach round (recovering the guardian key from its youngsters) wouldn’t be potential with simply the kids private and non-private key since it could must reverse a HMAC-SHA512 (BIP-32)
For instance, it is going to be in a position to acquire the personal keys of any revealed public key belonging to a selected pockets, wouldn’t it then be capable to derive the grasp personal key of the pockets? Would it not be capable to attribute different public keys to the identical pockets?
If a quantum pc can derive the personal key from a given public key, it could nonetheless not be potential to derive the grasp personal key, since—as defined earlier—it’s inconceivable to calculate the guardian keys. All the kids keys would even be safe so long as the attacker doesn’t have the chaincode to calculate the kids.
