to lock, to make read-only, to prevent further changes. Using the keyword
final seals a variable’s value. This is
analogous to sealing a letter with wax and a signet ring imprint. If somebody
tampers with the letter, the seal will be broken.
to encapsulate a serialised object in a cryptographic covering so that its
confidentiality is preserved. An object is serialised, encrypted and made a field
of a carrier object.