A study on encryption strength of advanced encryption standard

Abstract

With the popularity of the Internet, information transmission speed and convenience has been a substantial increase. In the transmission of sensitive or confidential information, you can encrypt them in order to prevent the leakage or intercept of the information. There are many kind of mainstream encryption functions. In our study, the Advanced Encryption Standard(AES) is used to encrypt several common file types by changing the encryption key or plaintext in different encryption modes to examine its encryption strength. The comparisons of ciphertexts have significant differences in the ECB encryption mode for some file types. Therefore, we suggest that the CBC, CFB, OFB encryption modes are suitable for the AES method.