期刊名称：International Journal on Computer Science and Engineering
印刷版ISSN：2229-5631
电子版ISSN：0975-3397
出版年度：2013
卷号：5
期号：06
页码：553-560
出版社：Engg Journals Publications
摘要：Data encryption standard in spite of being a great algorithm in terms of a good combination of confusion and diffusion steps, doesn�t largely used because of a weak key concept. The key used in DES is only 64 bits (or 56 bits) long. This paper introduces a concept of pre distributed powerful key for DES. In this for every round of DES a new key is getting used which makes cryptanalyst to attack not 56 bits but 16 keys of 56 bits each which makes it a much stronger algorithm.
关键词：Encryption algorithms; Data encryption standard; Key pool; Pre distributed keys; Weak key; Powerful key; Key pool.
