Surgical staple cartridges with movable authentication key arrangements

A surgical stapling assembly, comprising:

• a surgical stapling device, comprising:
• a first jaw;
• a second jaw supported relative to said first jaw, wherein said second jaw is movable relative to said first jaw between an open position and a closed position;
• a firing member movable between a starting position and an ending position during a staple firing stroke;
• and
• a lockout movable between a locked position wherein said lockout prevents operation of said surgical stapling device and an unlocked position wherein said surgical stapling device is operable, and wherein said surgical stapling assembly further comprises:
• a staple cartridge assembly configured to be seated in said first jaw, wherein said staple cartridge assembly comprises a movable authentication key, wherein said authentication key is movable from a first state to a second state upon contact with a portion of said surgical stapling device when said staple cartridge assembly is seated in said surgical stapling device, and wherein said authentication key moves said lockout from said locked position to said unlocked position when said authentication key moves from said first state to said second state.