Niederreiter public-key cryptosystem based on QC-LDPC
DU Wei-zhang · Journal of Computer Applications · 2011
A Niederreiter public-key cryptosystem based on Quasi-Cyclic Low-Density Parity Check(QC-LDPC) Code was proposed.As the check matrix of QC-LDPC is sparse,and has the structure of circulative blocks and high error correction capability,compared with other public-key cryptosystem,the key sizes of the new cryptosystem were reduced and transmission rate was improved.A new parity-check matrix was mapped by invertible transformation matrix Q with diagonal form.The sparse characteristic of H′ is countervailed.Through analyzing the existing attacking methods,security of the cryptosystem has been confirmed.