Abstract: According to some existent issues in the current teaching of cryptography,a cryptography aided teaching system is designed and implemented.The system uses Canvas to dynamically display the workflow diagram and the inner data changes during the execution of the algorithm.The comparison with the similar software and the concurrent performance tests show that the cryptography assisted teaching system can not only help students understand the abstract cryptography algorithm principles and the intuitive workflow,but also have a competitive edge in structure,application size and the number of experiments;furthermore,it can still perform well in the high-concurrency environment.

Key words: cryptography, aided instruction, dynamical display, Canvas