A data encryption scheme combined symmetric encryption algorithm with asymmetric encryption algorithm

In order to explore the research of computer network data security encryption technology. The author proposes a data encryption scheme that combines symmetric encryption algorithms with asymmetric encryption algorithms, by combining AES algorithm with RSA algorithm and ECC algorithm, improved hybrid encryption algorithms AES-RSA and AES-ECC are obtained. In order to verify the correctness of the scheme, a Hadoop experimental platform was built and tested using Hadoop Eclipse, the time required for different algorithms to encrypt the same size of data was measured. Through the analysis of the obtained experimental data and the safety of the experimental plan, the experimental results indicate that, the AES-RSA algorithm takes slightly longer to encrypt the same data than the AES-ECC algorithm, this is because in these two hybrid encryption algorithms, the RSA algorithm defaults to using a 1024 bit key, while the ECC algorithm selects a key length of 160 bits. A 160 bit ECC key can provide security equivalent to a 1024 bit RSA key, so based on the advantage of small key bits, under the same security strength, the AES-ECC algorithm has higher encryption efficiency than the AES-RSA algorithm. It has been proven that the improved encryption algorithm has the advantages of efficiency and high security, and can achieve secure storage of data in cloud computing environments.