改进轻量级AES算法的充电桩数据加密研究OA

In view of the problems of malicious attacks and data leakage in the data transmission process of charging piles and the limited resources of their embedded devices,an improved lightweight AES(Advanced En-cryption Standard)data encryption method for charging piles is proposed.Based on the standard AES,improve-ments have been made in two aspects:simplifying the S-box and enhancing column obfuscation efficiency,reduc-ing device resource occupation and improving encryption efficiency.Logistic mapping is introduced to generate cha-otic keys with higher security,avoiding the brute-force cracking of fixed keys in a short period of time.The test re-sults of the charging pile show that the lightweight AES performs well in terms of encryption time,memory consump-tion and avalanche effect.The encryption time of lightweight AES is 25.19 percentage points lower than that of stan-dard AES and 36.92 percentage points lower than that of 3DES(Triple Data Encryption Standard).The space occu-pied by the program memory is 24.24 percentage points less than that of standard AES and 29.61 percentage points less than that of 3DES.The space occupied by dynamic memory is 54.83 percentage points lower than that of stan-dard AES and 56.59 percentage points lower than that of 3DES.The avalanche effect,balance standard and key se-curity have all been improved.The results show that lightweight AES has good performance and security in the data encryption of charging piles.