通过上机操作，使学生对有限域的概念、性质及运算有一个充分的认识，为接下来现代密码学的学习打好基础。(Through the operation of the machine, the students have a full understanding of the concept, nature and operation of the limited domain, so as to lay a good foundation for the study of the next modern

通过上机操作，使学生对高级加密标准AES算法的执行过程、密钥编排方案和加密算法的实现过程等有一个更加清晰地认识。通过本次实验，加深学生对分组密码的认识。(Through the operation of the computer, we have a clearer understanding of the implementation process of the AES algorithm, the key arrangement scheme and the implementation