Efficient and Secure File Transfer in Cloud Through Double Encryption Using AES and RSA Algorithm

With recent advances in Cloud computing, information is being contracted by cloud services. Dropbox and Google Drive provide cloud services to users with low-cost storage. Here we present a protection method by encrypting and decrypting the files which offer an enhanced level of protection. To encrypt the file that we upload in cloud, we make use of Double encryption technique. The file is being encrypted twice using the two algorithms one after the other. The file is first encrypted using AES algorithm and then by RSA algorithm. The corresponding keys are being generated during the execution of the algorithm. This technique increases the security level. The various parameters that we have considered here are security level, speed, data confidentiality, data integrity and cipher text size. Our method is more efficient as it satisfies all the parameters where the conventional methods failed to do so. The cloud we used to store the content of the file is DropBox, which is in the encrypted format using AES and RSA algorithms.