Is it possible to determine the index of a bip32 address? Let's assume that we only have the bip32 derived btc address, no private or public key. Is it possible to find out its index used for the bip32 generation?
One of the privacy properties of BIP32 is that given two public keys (or even private keys), you cannot even tell whether they were generated from the same xpub or two distinct xpubs. This implies you certainly can't tell their index.