• Atiya R Kazi
• Sayali Ramdas Ghag
• Rucha Sanjay Hardikar
• Tejal Avdhut Sapte

: Encryption is the technique of hiding private or sensitive information within something that appears to be nothing be a usual. If a person views that cipher text, he or she will have no idea that there is any secret information. Encryption performs a major role to intelligently misguide humans by not actually making the data visible to them but wrap it in the form that humans cannot detect the inside data. This system enables the user to send their secret text on cloud by providing a key to them. This key encrypts the data so that even if the data is grabbed by the hacker, it won’t be disclosed. The receiver uses the shared secret key which was used by the sender, to decrypt the received message. For providing more security comparison of Diffie-Hellman key exchange, Data Encryption standard (DES) and Blowfish is done. This will offer the better algorithm for providing security of both as it uses public key techniques to allow the exchange of a private encryption key. This method ensures that the secret message is sent over cloud securely. If sender sends this cipher text in public others will not know what is it, and it will be received by receiver. The cloud data storage is used to store the required information. The project will be primarily accessing the output stored on cloud for comparing purpose.

- Diffie-Hellman, DES (Data Encryption Standard), Blowfish, Cloud Computing

"COMPARISON OF SECURITY ALGORITHMS USING SYMMETRIC KEY CRYPTOGRAPHY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.407-409, April-2019, Available :http://www.jetir.org/papers/JETIR1904361.pdf

"COMPARISON OF SECURITY ALGORITHMS USING SYMMETRIC KEY CRYPTOGRAPHY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp407-409, April-2019, Available at : http://www.jetir.org/papers/JETIR1904361.pdf