分组密码S盒的可重构设计方案

Design for reconfigurable S-box of block ciphers

对两种可行的S盒可重构设计方案进行了分析与比较,在此基础上提出采用查找表方式来对可重构S盒进行设计。以6×4模式的S盒为基础,对6×4和8×8的S盒的可重构设计进行了详细讨论。通过分析,该设计模型能对4×4和8×32的S盒进行很好的重构支持。从而便完成了对4×4、6×4、8×8、8×32这4种模式的S盒的可重构设计。设计结果表明,该模型能灵活地实现4种不同模式的S盒变换,并能使资源得到充分利用,减少资源的消耗。

Two designs for reconfigurable s-box are analyzed and compared,based on this,a design for reconfigurable s-box using look up table is given.The reconfigurable design about s-box with the mode of 6× 4 and 8× 8 is discussed in detail based on the s-box with the mode of 6× 4.After analysis,the s-box with the mode of 4× 4 and 8× 32 is supported well by this design model.So the reconfigurable s-box with the mode of 4× 4,6× 4,8× 8,8× 32 is designed.The outcome of the design shows that the model implement s-box of 4 modes flexibly,and the resource is used to the full,the resource consuming is reduced.