RISC微处理器S盒替换指令扩展  

S-box Substitution Instruction Extension of RISC Microprocessor

作　　者：郭怡惠 李森森[1] 戴紫彬[1] 张立朝[1] 

机构地区：[1]解放军信息工程大学,河南郑州450000

出　　处：《微电子学与计算机》2014年第5期53-57,共5页Microelectronics & Computer

摘　　要：为解决RISC微处理器实现S盒替换操作效率低下这一问题,提出一种通过设计S盒替换专用模块和指令进行指令扩展的方法,使得微处理器在执行S盒替换操作时具有较高性能.根据分组密码算法S盒替换的操作特征,设计支持8-32、8-8、6-4、4-4四种常用模式的S盒替换模块和操作指令,最后采用布尔函数的方法完成S盒替换模块的电路设计.用EDA软件进行验证,实验结果表明处理器能够正确执行S盒替换操作且能够显著提升性能.Low efficiency is a main problem when the RISC microprocessors implement S-box substitution operation . In order to attack it ,an approach is proposed in this paper ,which is done by extending instructions through designing special module and instruction for S-box substitution ,thus raising the performance of it .A new kind of S-box substitution module and operation instruction is designed based on the characteristics of S-box substitution operation of block cipher algorithm ,which can support the four common modes of S-box substitution module ,i .e ., 8-32 ,8-8 ,6-4 ,4-4 mode .The circuit implementing S-box substitution module is then designed adopting the Boolean function method .The concept is finally verified in EDA software ,which shows the validity of the method and reveals the significant improved performance .

关 键 词：RISC 微处理器 S盒 指令扩展 布尔函数 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]