carrying a meaning determined by a new, superseding, or additionally-clarified partnership agreement that (i) came into force later than the beginning of current deal and (ii) is based on information that may have become available to some players but not others. [For examples, see Encrypted call and Encrypted signal. Most common bidding and defensive card-play agreements are not encrypted, even though their interpretations may benefit from knowledge available to only some players, because the governing partnership agreement does not change. Suppose, for instance, that a defender makes a lead from equal cards that establishes a suit at notrump. It is often agreed that the card chosen is a suit-preference signal--high card suggests entry, strength or interest in a relatively high-ranking suit; low card refers to a low-ranking suit. Even though the partner of a player giving such a signal could sometimes better interpret it because on knowledge that the defense but not the declarer possesses, the signal is not encrypted because the agreement in force, high card means high suit etc., does not change during the deal.