Demo.java:13: warning: [cast.unsafe] cast from "@PossiblyUnencrypted String" to "@Encrypted String" cannot be statically verified
        return (@Encrypted String) new String(b);
               ^
Demo.java:36: error: [argument.type.incompatible] incompatible types in argument.
        sendOverTheInternet(password); // invalid
                            ^
  found   : @PossiblyUnencrypted String
  required: @Encrypted String
1 error
1 warning