• Anushree Krishnamurthy
• Shilpa V
• Bindu S
• Aman Mani G
• Balaji Reddy D

Nowadays clouds have become a very common plot form in the internet world. Cloud computing provides many services in that storage as a service is one. When you are storing your data in a public cloud, securing your data becomes a big challenge. Our data will be stored in remote cloud servers. We can access our cloud remotely. In this case, we have obeyed the provider license agreements. We need to trust providers blindly. So it is very important to secure our data with encryption. We are implementing a secure cloud storage system with AES, Triple DES, and Blowfish algorithms by applying fragmentation. Secret agencies can use our systems to share information. In our project, we have modules named Administrator, Data Owner, Data User, and Cloud Server. The administrator will manage the data owner accounts, data user accounts, and file access permissions. The administrator can monitor uploads and downloads. The data owner will upload the files into the system. We are applying double encryption on the file. The generated cipher text is going to be divided into seven fragments. These fragments will upload into the Firebase cloud. The user can download the files by requesting the file key. The user will receive the key through email after a request is processed by the data owner. If the key is valid the file will download. while downloading the seven fragments will combine as a single fragment and a double description will apply to the file. The plain text will download as a text file. The cloud can track the upload and downloads, the cloud can view data owners' and data users' details.

Encryption, AES Algorithm, DES Algorithm, Blowfish Algorithm, Cloud

"Secure Data Transfer Using Cryptography", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 5, page no.e205-e207, May-2023, Available :http://www.jetir.org/papers/JETIR2305431.pdf

"Secure Data Transfer Using Cryptography", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 5, page no. ppe205-e207, May-2023, Available at : http://www.jetir.org/papers/JETIR2305431.pdf