In order to provide an information concealing apparatus, an information reconfiguring apparatus, an information concealing system, an information concealing method, an information reconfiguring method, an information concealing program, and an information reconfiguring program to reduce information leakage risks, an information concealing system includes an information concealing apparatus, and an information reconfiguring apparatus. The information concealing apparatus generates a codeword capable of error-correcting concealment-side input information, generates noise including a predetermined error, and generates concealment information capable to reconfigure the concealment-side input information, by adding the concealment-side input information and the noise to the codeword. The information reconfiguring apparatus reconfigures the codeword from the concealment information, based on reconfiguration-side input information and the concealment information.