Depending on the compatibility of the new chain to the old one, there are two types of forks: soft and hard. A soft fork is a blockchain fork in which the newly forked blockchain is compatible with the old one. In this case, the old nodes are still able to process blocks mined by the new nodes, even though the blockchain code has changed as a result of the upgrade. With a soft fork, nodes can still operate on the same chain, even if they don't verify or process certain blocks.

Taint/flow tracking: Dust is followed to see where it’s co-spent. Off-chain anchors: Deposits to exchanges (with identity verification), public donation addresses, or leaks can tie a cluster to a real person.How do I counter a dusting attack? For most cryptocurrency users, being a victim of a dusting attack is unlikely. Hackers tend to target wallets that own a substantial amount of crypto. Even so, everyone should take steps to protect themselves from such an attack.