A CRYPTOGRAPHIC STUDY ON S—BOXES OF DES TYPE Ⅱ——AN ENTROPY LEAKAGE ANALYSIS FOR THE KEY  

作　　者：曾肯成 戴宗铎 杨君辉 

机构地区：[1]Graduate School of Academia Sinica,Beijing 100039,China [2]Computing Center of Academia Sinica,Beijing 100080,China

出　　处：《Systems Science and Mathematical Sciences》1991年第4期302-308,共7页

基　　金：Research supported by National Natural Science Fundation of China

摘　　要：The concept of key-entropy drop in an S-box is introduced.It is established that theoutput functions of the permutations composing an S-box belong to three patterns of key-entropydrop.An analysis of the distribution of the key-entropy drop patterns in the 8 S-boxes in the DEShas been made.The concept of key-entropy drop in an S-box is introduced.It is established that the output functions of the permutations composing an S-box belong to three patterns of key-entropydrop.An analysis of the distribution of the key-entropy drop patterns in the 8 S-boxes in the DEShas been made.

关 键 词：DES S-BOX ENTROPY 

分 类 号：N94[自然科学总论—系统科学]