all funds received to addresses generated after the most recent backup. Private keys can be kept on computer files, but in meilleur forex ligne some cases are also short enough that they can be printed on paper. As mentioned, there is also a public key. Current standards for message signatures are only compatible with "version zero" bitcoin addresses (that begin with the number 1). Therefore, it can safely recover all addresses, and all funds sent to those addresses.
Private key - Bitcoin Wiki
Bitcoin Public and Private Keys - dummies