DBST:a lightweight block cipher based on dynamic S-box  

作　　者：Liuyan YAN Lang LI Ying GUO 

机构地区：[1]College of Computer Science and Technology,Hengyang Normal University,Hengyang 421002,China [2]Hunan Provincial Key Laboratory of Intelligent Information Processing and Application,Hengyang Normal University,Hengyang 421002,China

出　　处：《Frontiers of Computer Science》2023年第3期177-185,共9页中国计算机科学前沿（英文版）

摘　　要：IoT devices have been widely used with the advent of 5G.These devices contain a large amount of private data during transmission.It is primely important for ensuring their security.Therefore,we proposed a lightweight block cipher based on dynamic S-box named DBST.It is introduced for devices with limited hardware resources and high throughput requirements.DBST is a 128-bit block cipher supporting 64-bit key,which is based on a new generalized Feistel variant structure.It retains the consistency and significantly boosts the diffusion of the traditional Feistel structure.The SubColumns of round function is implemented by combining bit-slice technology with subkeys.The S-box is dynamically associated with the key.It has been demonstrated that DBST has a good avalanche effect,low hardware area,and high throughput.Our S-box has been proven to have fewer differential features than RECTANGLE S-box.The security analysis of DBST reveals that it can against impossible differential attack,differential attack,linear attack,and other types of attacks.

关 键 词：internet of things 5G dynamic S-box bit-slice technology lightweight block cipher 

分 类 号：TN91[电子电信—通信与信息系统]