PARAMETER GENERATION APPARATUS, ENCRYPTION SYSTEM, DECRYPTION SYSTEM, ENCRYPTION APPARATUS, DECRYPTION APPARATUS, ENCRYPTION METHOD, DECRYPTION METHOD, AND PROGRAM THEREOF

摘要

password and the decoder to reliably and securely encrypted communication between the run to make the NTRU cryptosystem in parameter generating device for generating a parameter that does not cause the decoding error denotes a condition that does not cause the decoding error , based on a given error condition in advance information temporary parameter generating portion which generates a temporary parameter set that does not cause the decoding error ; And on the basis of the lattice constant calculated from the temporary set of parameters by using the temporary parameter set , a parameter generating an output for outputting an output parameter does not cause the decoding error .