Say FBI arrested a guy who bought some drugs using bitcoin. Then, is it possible for FBI to trace a drug dealer using the arrested guy’s PrivateKey and his transaction histories?
If my understanding of bitcoin algorithm is correct, this is impossible since PublicKey only shows that “there is a user with this public key” and it does not give any more information about a user who owns that PublicKey.
Moreover, transaction that the dealer and the arrested guy made only shows public keys.
Can one trace someone using past trasactions?