A parameter generation apparatus for generating parameters causing no decryption error for an NTRU cryptosystem so that an encrypted communication can be carried out between an encryption apparatus and a decryption apparatus in a secure and reliable manner. A second varnish film forming cylinder has a second supply surface to which varnish is supplied. The cell coupling member is coupled to the unit cell and includes a coupling member. In an implementation, the sampling point of the data path is optimized for better horizontal eye opening using a Gardner detector’s output for centering the average crossing point of different paths.