Provided is a content distribution system that prevents different keys to be derived between an encryption apparatus and a decryption apparatus. The antireflective compositions of the invention in general comprise a resin binder component that contains a high molecular weight polymer, e. The timeslot is a time for a corresponding node to receive messages transmitted by other nodes. An aperture extends entirely through the grip member first and second sides such that the pick surface is exposed through the aperture when the grip member is adhesively connected to the pick surface permitting the user’s finger to contact both the abrasive particles and the pick surface through the aperture.