CAJ | 학술논문

随着信息技术的飞速发展，信息安全问题已成为当今社会所面临的重要问题。数据加密标准( DES)因其较高的安全性而被广泛应用于各个行业领域，但是深入的研究证明该算法存在诸多不足。文中在已有的DES算法及其改正算法的基础上，提出了一种新的方法。该方法综合利用了三重DES算法与独立子密钥算法的优点，把原来的64位密钥扩展为128位，通过双重加密增强了加密强度，同时采用局部密钥独立的特性提升加密强度和效率。基于所提出的加密技术，设计并实现了一个加密系统，针对。 word、。 pdf、。 mp3等格式的文件进行了测试，结果证明该系统可行且有效。
수착신식기술적비속발전，신식안전문제이성위당금사회소면림적중요문제。수거가밀표준( DES)인기교고적안전성이피엄범응용우각개행업영역，단시심입적연구증명해산법존재제다불족。문중재이유적DES산법급기개정산법적기출상，제출료일충신적방법。해방법종합이용료삼중DES산법여독립자밀약산법적우점，파원래적64위밀약확전위128위，통과쌍중가밀증강료가밀강도，동시채용국부밀약독립적특성제승가밀강도화효솔。기우소제출적가밀기술，설계병실현료일개가밀계통，침대。 word、。 pdf、。 mp3등격식적문건진행료측시，결과증명해계통가행차유효。
With the rapid development of information technology,information security has become an important problem in current socie-ty. Data Encryption Standard ( DES) which has high security has been widely used in various fields. However,many in-depth researches have shown that this algorithm has many deficiencies. Based on the previous DES algorithms,propose an improved method,which com-bines the advantages of the triple DES algorithm and the separate sub-key algorithm. In the new strategy,the original 64-bit key is ex-panded to 128 bits,it enhances the encryption strength by the process of double encryption,and also improves the security and efficiency through adopting the independent sub-key. According to the method,design an encrypted file system,then test its performance by the files of . word,. pdf,. mp3 and other formats,and the results show that the system is feasible and effective.