ADV MATH SCI JOURNAL Advances in Mathematics: Scientific Journal 9 (2020), no.9, 6667–6678 ISSN: 1857-8365 (printed); 1857-8438 (electronic) https://doi.org/10.37418/amsj.9.9.24 Spec. Issue on CAMM-2020 DUAL ENCRYPTION MODEL FOR PRESERVING PRIVACY IN CLOUD COMPUTING OM PRAKASH JENA 1 , ALAKANANDA TRIPATHY 2 , SAMBIT SWAGATAM 3 , SMITA RATH 4 , AND ALOK RANJAN TRIPATHY 5 ABSTRACT. Secure data transmission is an essential prerequisite of every cloud- based structures. Various networks such as e-commerce, online banking and even software applications operate with cloud infrastructure and transfer the tremendous amount of crucial data daily. Fundamentally, this paper deals with risk factors that are security issues faced during cloud data management. This paper addresses a hybrid encryption technique to protect cloud privacy and se- curity. Elliptic Curve Cryptosystem (ECC) and Advanced Encryption Standard (AES) are the two best asymmetric encryption algorithms and symmetric en- cryption technology, respectively. The AES-ECC hybrid cryptosystem merges the benefits of AES algorithm to speed up data encryption with ECC algorithm based on symmetrical session key exchange. In the proposed method the delay factor is minimized and is computationally efficient, robust and secure. 1. I NTRODUCTION In recent years, computing resources are more affordable, more powerful and more widely available than ever before because of the proliferation and rapid growth of processing and storage technology and the increase on the Internet. Such software advancement is generally referred to as cloud storage. Cloud 5 corresponding author 2010 Mathematics Subject Classification. 68W99. Key words and phrases. AES, ECC, Hybrid Cryptography, Delay Timing. 6667