Abstract

The proposed of this paper is for the security needs of the cloud data center. Blowfish is used to convert encrypt file cuts, takes the minimum amount of time, and has the extreme throughput for encryption and decryption from other compatible algorithms. The idea of spreading and mixing meets the principle of information security. The hybrid approach makes the remote servers more secure when deployed in a cloud environment and, thus helps cloud providers gain more trust from their users. Used for data safety and privacy issues, the basic challenge of separating sensitive data and access control has been met. Cryptography techniques translate original data into an unreadable format. The encryption technique is divided into private key encryption and public-key encryption. Here we will use AES 128-algorithm, DES, RC, and LSB encryption techniques. This technique uses keys to translate data into an unreadable format. Therefore only authorized persons can access data from the cloud server. Ciphertext data is visible to all.

Introduction

I. INTRODUCTION

Cloud computing is used in various areas like industry, military, colleges, etc. To store a huge amount of data. We can retrieve data from the cloud and requests of users. But the security of files stored on cloud servers is very less to provide a solution to these issues. There are multiple ways of cryptography and steganography techniques are the most popular nowadays for data to security. The use of single and problem is not effective for a high level of security to data in cloud computing. So using multiple layers of the algorithm is very problematic as it increases the security but also increases the time for uploading and downloading. So in this, we are using an asymmetric key cryptography algorithm and steganography. Here we will be using AES, DES, and RC6 encryption techniques to encapsulate by dividing the file into three separate files and then encryption along with it we also are using the LSB technique to enhance security and file sharing.

II. LITERATURE SURVEY

A. Problem and Formation Design

Many of the benefits of using cloud storage include:

1. It removes the need for physical storage Tools.
2. Data can be saved in any format using cloud storage.
3. Cloud storage provides secure backup, as opposed to. Physical storage devices, data loss computer virus corruption, and natural disasters, among other reasons, can lead to data loss.
4. Cloud storage is more cost-effective because it eliminates. Need to invest in hardware.
5. Cloud storage also helps developers work together and share their work more efficiently and fast.

Another benefit of cloud storage can be added. The future security system’s main aim is to make cloud storage. Secure the system using data encryption. Thus, the purpose of to enhance the security of the data uploaded to the proposed system. Cloud uses encryption algorithms to create systems more secure.

III. ALGORITHM USED

A. Advanced Encryption Standard (AES):

The AES algorithm is related to Rijndael's encryption. Rijndael is a family of encryption algorithms with different keys and blocks size it consists of ongoing serial operations, some of which include the input of certain output (substitutions) and others Bits mix (permutations).

Altogether AES calculation algorithms are executed in bytes instead of bits. Therefore, for the advanced encryption standard, 128 bits is simple data is treated as a block of 16 bytes. These 16 bytes are organized in 4x4 matrixes for processing.

There are the three types of AES algorithms: AES-128bit, AES-192bit, and AES-256bit each iteration encrypt and decrypts the data blocks using 128 bits or 192 bits or 256 bits keys, respectively. The Rijndael method was extended to accept extras. Block size and more key length, but for AES, those functions were not inherited. 

B. Triple Data Encryption Standard (3DES):

In encryption, 3DES is an inherited better-quality version of DES (Data Encryption Standard). In the triple DES algorithm, DES is used twice to increase the security level. Triple DES is also known as TDES or Triple Data Encryption Algorithm (TDEA).

TDES has the following key:-

1. All the keys are different.
2. Key 1 and key 2 are different and key 1 and key 3 are identical.
3. All keys are the same.

TDES is slowly disappearing from use; it is increasingly being replaced by AES (Advanced Encryption Standard). There is a far-reaching anomaly in the digital payments industry, which still uses 2TDES and scatter standards on this basis (eg:- EMV, "chip cards" and IC compatible POS terminals, and ATM collaboration standards). This security that TDES will continue to act as the standard of future cryptography.

C. Rivest Cipher 6 (RC6)

RC6 is a compatible key block cipher. RC6 (Rivest Cipher 6) is an enhanced better quality version of the old RC5 algorithm. RC6 - means w / r / b that four w-bit-word plaintexts are encrypted with r-rounds via b-bytes keys. This is a proprietary algorithm unproved by RSA security. RC6 operators use five basic operations as a unit of W-bit words such as increment, subtraction, slightly specific-or, a Multiplying, and shifting depending on the data. The block size of the RC6 algorithm is 128 bits and it also works with key sizes 128 bits, 192 bits, and up to 256 bits and 2040 bits dissimilar features of the RC6 include the use of four working registers instead of adding numerical multiplication as two and one additional initial processes. Significant use of multiplication increases spread per round, allowing more security, fewer laps, and more efficiency. Furthermore, like the RC5, it can also support different word lengths, key sizes, and a number of rounds. The RC6 algorithm is very similar in structure to the RC5 algorithm In fact, RC6 can be thought of as two parallel RC5 encryption processes, although RC6 uses additional multiple operations that are not used in the RC5 algorithm to make the rotation of each bit in a word dependent, not just the least important bits. 

D. Blowfish

Blowfish is a powerful cipher that uses 16 rounds of  Fiesta network, difficult encryption, and decryption functional design the size of the design used is 64 bits and the key size can be up to 448 of any length. Blowfish Cipher uses 18 subs each of the 32 bits is commonly known as a P-Box and four alternatives to each of the 32 bits, 25 entries in each algorithm design is merged into the shape. It consists of two phases: a key extension phase and data encryption in step key extensions, the key is converted to multiple levels of keys, and in data encryption, through encryption. 16 round networks each round has a key council and an alternate selection on a key and data.

Conclusion

The main purpose of this system is to securely store and retrieve data in the cloud which is only under the control of the data owner. Data security cloud storage issues are solved by using encryption and steganography techniques. Data security is achieved by RC6, 3DES and AES algorithms. Key information is securely stored using LSB technique (steganography). It takes less time for the process of encryption and decryption using multi-threading techniques. And so help of the proposed security mechanism, we improved data integrity, high security, low latency, authentication and confidentiality. We may add in the future public key encryption to avoid any attack during data transfer from client to server.

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Copyright

Copyright © 2022 Chetan Vijaykumar Dalave, Anushka Alok Lodh, Tushar Vijaykumar Dalave. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.