CAJ | 학술논문

在多跳的认知系统中,由于不存在可信实体作为服务器控制密钥分发,安全性将面临更大挑战,需要建立完善的加密体系结构来解决这一问题.将高级加密标准AES和在通信纠错领域性能优异的低密度奇偶校验码(low-density parity-check, LDPC)结合,设计出了分组长度为128 bit的六轮宽轨迹加密策略、密钥由128 bit AES密钥和LDPC生成矩阵组成的LDPC纠错加密器.由于LDPC生成矩阵具有更好的扩散性能,使得这种新设计的LDPC纠错加密器能在更少的轮数下具有较好的安全性.最后,通过实验结果验证了AES-LDPC纠错加密器的性能.
재다도적인지계통중,유우불존재가신실체작위복무기공제밀약분발,안전성장면림경대도전,수요건립완선적가밀체계결구래해결저일문제.장고급가밀표준AES화재통신규착영역성능우이적저밀도기우교험마(low-density parity-check, LDPC)결합,설계출료분조장도위128 bit적륙륜관궤적가밀책략、밀약유128 bit AES밀약화LDPC생성구진조성적LDPC규착가밀기.유우LDPC생성구진구유경호적확산성능,사득저충신설계적LDPC규착가밀기능재경소적륜수하구유교호적안전성.최후,통과실험결과험증료AES-LDPC규착가밀기적성능.
In the hopping cognitive radio (CR) system, the security is facing a challenge because there does not exist that a server as the credible entity to display the keyboard. So it is necessary to enhance the encrypting system to solve the problem. The paper presents an LDPC error correcting cipher by combining the advanced encryption standard (AES) and LDPC code. The LDPC error correcting cipher, which is based on wide trail strategy, is a six round block cipher that encrypts 128 bit plaintexts, and the key is composed of 128 bit AES secret keys and an LDPC generator matrix. By using the LDPC generator matrix with high performance in the property of diffusion, the LDPC error correcting cipher has a fairly good property in security in fewer rounds. Simulation results show that the processes of encrypting/decrypting have the better performance.