A conditional access apparatus receives a filter condition from another conditional access apparatus to set the filter condition to a filter unit 1 thereof. The compression function layer 60 adds a function of being compressed by receiving pressure in the direction of the board thickness to the resin board 10 which includes this layer. The angle between the central axis of the upper leg is approximately sixty degrees relative to the central axis of the lower leg. A decoder architecture is also disclosed for decoding a code that can be described using a bipartite graph having interconnected bit nodes and check nodes.