i have done this works to demonstrate the data security by the help of cloud storage.It determines many algorithm including so many tools and many more..

1. FINAL REVIEW
Storage Technologies
Under guidance of: Prof. S Bhavani
Paper topic – Ensuring Data security and Access to Data in Cloud
Storage
Arnab Saikia 15BIT0072
Kedar Kumar 15BIT0268
Abstract
Cloud Storage is a straightforward and
versatile approach to store, access, and
offer information over the Internet.
Distributed storage suppliers, for example,
Amazon Web Services claim and keep up
the system associated equipment and
programming, while you arrangement and
utilize what you require through a web
application.
Cloud storage is effective for information
storage. Clients' information are sent to the
cloud is to be put away in the open cloud
condition. Information put away in the cloud
storage may blend with other clients'
information. This will prompt the information
insurance issue in cloud storage. In the event
that the privacy of cloud information is
broken, at that point it will make loss of
information. Security of cloud storage is
guaranteed through privacy parameter. To
guarantee the privacy, the most well-known
utilized system is encryption. However,
encryption alone doesn't give greatest security
to the information in the cloud storage. To
have proficient cloud storage secrecy, this
paper utilizes encryption furthermore,
obfuscation as two unique systems to secure
the information in the cloud storage.
Encryption is the way toward changing over
the discernable content into garbled shape
utilizing a calculation and a key. Jumbling is
same like encryption. Jumbling is a procedure
which camouflages illicit clients by actualizing
a specific numerical capacity or utilizing
programming strategies. Based on the sort of
information, encryption and jumbling can be
connected. Encryption can be connected to
letter sets and alphanumeric sort of
information and jumbling can be connected to
a numeric sort of information. Applying
encryption and jumbling strategies on the

2. cloud information will give more insurance
against unapproved utilization. Classification
could be accomplished with a blend of
encryption and obfuscation
This paper proposes a proficient cloud storage
secrecy procedure by utilizing encryption and
obscurity strategy . Ordinarily, privacy is
guaranteed by encryption strategy, however
for the cloud condition encryption alone isn't
sufficient for information security. Encryption
is incorporated with obscurity procedure.
Obscurity strategy alone is likewise
insufficient to receive for finish classification
of information in cloud storage in light of the
fact that the client can discover values through
figuring out or by utilizing animal constrain
system, which may trade off cloud information
security
Introduction
Cloud computing provides scalable computing
resources as a service with Internet based
technologies. Assets are shared among
countless considering a lower cost of IT
proprietorship. At introduce, cloud computing
is generally talked about in the scholarly
community and industry. Virtualization,
disseminated processing innovation and so on,
cloud computing coordinates the registering,
storage, organizing and other computing
assets, and after that leases to clients. The
Cloud storage is intended for virtualized PC
condition. The cloud storage is executed
utilizing cloud processing that implies using
the product and equipment assets of the cloud
processing specialist co-op While there are
many points of interest of cloud processing,
the endeavours are as yet holding up to utilize
cloud processing, in view of the information
security issue of cloud processing isn't
comprehended totally. Cloud Storage gives a
virtual space to store mass information. Be that
as it may, the information proprietors have no
influence over their information. The cloud
supplier has full control on the client's
information. This influences the client's psyche
to thing about the information security in the
cloud. Information insurance in the cloud

3. storage is the center security issues.
Information security is worried about
information secrecy, honesty, confirmation,
accessibility thus on. Information secrecy
implies that exclusive approved people can
utilize the information. Information
uprightness alludes to data that has not been
altered or stays untouched. Verification alludes
to the way toward checking whether the
approaching client is approved or not.
Information accessibility alludes to the
capacity to certification to utilize information
in time when required and furthermore alludes
to the accessibility of cloud specialist co-op
on-request.
This paper proposes an effective cloud storage
secrecy method by utilizing encryption and
obfuscation technique. Typically, privacy is
guaranteed by encryption method, yet for the
cloud condition encryption alone isn't
sufficient for information security. Encryption
is incorporated with obfuscation technique.
Obscurity method alone is additionally
insufficient to receive for finish privacy of
information in cloud storage in light of the fact
that the client can discover values through
reverse engineering or by using brute force
technique, which may trade off cloud
information security. This paper utilizes
encryption and obfuscation in a coordinated
way to shield the information from the
attackers. In the proposed system, clients
ought to encode and jumble the information
whatever they need to send to the cloud
storage. Encryption and obfuscation could be
done from client's side.
ISSUES REGARDING CLOUD STORAGE
The greater part of the issues are with security
of the information in the cloud. Guaranteeing
this issue in the cloud storage is most huge for
the cloud utilization organizations. The
information is classified and accessible when it
is required.
TRUST
Information, when put away in the cloud,
needs not exclusively to be Secret yet in
addition ought to be exact each time it
recovered after transferred or an alteration.
There ought not be lost uprightness of the
information. This is a legitimate situation
when outsider Sadministrations are traded off
by the vindictive operators This can be here
and there hard to identify and can in some
cases prompt extensive data spillage before
being found.
Cloud Service supplier understandings.
Utilization of the cloud storage administration
will turn out to be even more a item advertise,
security would be required and be important to
separate specialist co-ops and frameworks.
Information history
One of the critical highlights with nearby
information storage is the nearness of metadata
highlights which enable clients to see the
history of an information question. This
enables the frameworks to give information
uprightness checks and rollback abilities when
a debasement or trade off is identified in the
framework.
Information Possession
This issue is around related to one of substitute
issues examined how to trust the data set away
on the organization provider. Exactly when
data is recouped from the authority center on
playing out a trustworthiness check, it is hard
to choose how the data was secured in the
master communities system

4. PROPOSED CONFIDENTIALLY
TECHNIQUE
Cloud figuring gives an effective storage
setting to store and recover the cloud clients
basic information. Guaranteeing information
security is an imperative part to cloud clients
and in addition cloud suppliers. This paper
utilizes the classification parameter to address
the information security problems. Encryption
and obscurity of cloud information is done in
the client side. The key utilized for encryption
calculation is produced in the client condition.
Some Basic Terminology of Encryption
plaintext - original message
ciphertext - coded message
cipher - algorithm for transforming plaintext to ciphertext
key - info used in cipher known only to sender/receiver
encipher (encrypt) - converting plaintext to ciphertext

5. ALGORITHM1
Ceaser cipher
This mathematical description uses modulo
(clock) arithmetic. Here, when you reach Z
you go back to A and start again. Mod 26
implies that when you reach 26, you use 0
instead (ie the letter after Z, or 25 + 1 goes to
A or 0).
Example: howdy (7,14,22,3,24) encrypted
using key f (ie a shift of 5) is MTBID
Formula used here
Encryption:c = E(p) = (p + k) mod (26)
Decryption :p = D(c) = (c – k) mod (26)
ALGORITHM2
Playfair cipher
One way to deal with enhancing security was
to encode different letters. The best-known
various letter encryption figure is the Playfair,
which regards digrams in the plaintext as
single units and makes an interpretation of
these units into ciphertext digrams. The
Playfair calculation depends on the utilization
of a 5x5 network of letters developed utilizing
a catchphrase. The tenets for filling in this 5x5
lattice are: L to R, through and through, first
with catchphrase after copy letters have been
evacuated, and after that with the remain
letters, with I/J utilized as a solitary letter
Here monarchy word is taken as example to demonstrate
Plaintext is scrambled two letters at a time,according to the principles as appeared. Note how you
wrap from right side back to left, or from base back to top.

6. 1. if a couple is a rehashed letter, embed a filler like 'X', eg. "swell" encodes as "ba lx lo on"
2. if the two letters fall in a similar column, supplant each with letter to right (wrapping back to
begin from end), eg. "ar" scrambles as "RM"
3. if the two letters fall in a similar segment, supplant each with the letter beneath it (again
wrapping to top from base), eg. "mu" encodes to "CM"
4. generally each letter is supplanted by the one in its line in the segment of the other letter of
the match, eg. "hs" scrambles to "BP", and "ea" to "IM" or "JM" (as wanted)
Decoding obviously works precisely in turn around.

7. ALGORITHM3
Vignere cipher
The best known, and one of the least difficult,
such calculations is alluded to as the Vigenère
figure, where the arrangement of related
monoalphabetic substitution rules comprises of
the 26 Caesar figures, with movements of 0
through 25. Each figure is indicated by a key
letter, which is the ciphertext letter that
substitutes for the plaintext letter 'an', and
which are each utilized as a part of turn, as
appeared next.
CODES FOR ENCRYPTION:
DESCRIPTION:
The Vigenere Cipher which was proposed
by Blaise Vigenere in sixteenth century, is
a polyalphabetic substitution where every
section of table analyses to a Caesar
Cipher. The main push is a move of 0, the
second line is a move of 1, and the last line
is a move of 25. The Vigenere Cipher uses
the table together with watchword to
encipher message.

8. OUTPUT SCREENSHOT:
CODE (C++):
#include <iostream>
#include <string>
using namespace std;
class Vigenere
{
public:
string key;
Vigenere(string key)
{
for(int i = 0; i < key.size(); i++)
{
if(key[i] >= 'A' && key[i] <= 'Z')

9. this->key += key[i];
else if(key[i] >= 'a' && key[i] <= 'z')
this->key += key[i] + 'A' - 'a';
}
}
string encrypt(string text)
{
string out;
for(int i = 0, j = 0; i<text.length(); i++)
{
char c = text[i];
if(c >= 'a' && c <= 'z')
c += 'A' - 'a';
else if(c < 'A' || c > 'Z')
continue;
out += (c + key[j] - 2*'A') % 26 + 'A';
j = (j+1) % key.length();
}
return out;
}
string decrypt(string text)
{
string out;
for(int i = 0, j = 0; i < text.length(); i++)
{
char c = text[i];

10. if(c >= 'a' && c <= 'z')
c += 'A' - 'a';
else if(c < 'A' || c > 'Z')
continue;
out += (c - key[j] + 26) % 26 + 'A';
j = (j+1) % key.length();
}
return out;
}
};
int main()
{
Vigenere cipher("VIGENERECIPHER");
string original = "The quick brown fox jumps over the lazy dog";
string encrypted = cipher.encrypt(original);
string decrypted = cipher.decrypt(encrypted);
cout<<original<<endl;
cout<<"Encrypted: "<<encrypted<<endl;
cout<<"Decrypted: "<<decrypted<<endl;
}
CEASER CIPHER ENCRYPTION CODE

11. OUTPUT SCREENSHOT
CODE FOR CAESAR CIPHER:
#include <iostream>
#include <string>
using namespace std;
char cipher(char);
char decipher(char);
int main()
{
int x;
string input;
cout<<"Select 1 for Cipher, 2 for Decipher"<<endl;
cin>>x;
do
{
if (x=1)
{
getline(cin,input);
string output = "";
for (int i= 0; i < input.length(); i++)
{
output += cipher(input[i]);
}
cout<<output<<endl;
}
else if (x=2)
{

12. getline(cin,input);
string output = "";
for (int i= 0; i < input.length(); i++)
{
output += decipher(input[i]);
}
cout<<output<<endl;
}
}
while (input.length() ==0);
}
char cipher(char c)
{
if(isalpha(c))
{
c=(c+3);
}
return c;
}
char decipher(char d)
{
if(isalpha(d))
{
d=(d-3);
}
return d;
CONCLUSION
Cloud processing is gainful registering
administrations to an individual and venture
clients. In any case, because of some of
security issue in it, individuals may be hesitant
to utilize it. Once the issues are settled, cloud
figuring will be the trillion dollar business in
the processing scene. The Data storage on un-
trusted cloud makes information security as a
testing issue. Information security in the cloud
is guaranteed by the classification of touchy
information ought to be upheld on Cloud
storage benefit suppliers. This paper proposed
a cryptographic procedure which is connected
to address this issue. Scrambled information
are put away on storage servers while mystery
key(s) are held by information proprietor;
access to the client is allowed by issuing the
comparing information decoding keys.
So all in all we have shown how to
encapsulate data in cloud storage. This
security problem is one of the most
problematic issue in todays time. Hence it is
really very important to secure data in cloud
.

13. References
1 Minimum-Cost Cloud Storage Service Across Multiple Cloud Providers
Guoxin Liu; Haiying Shen
IEEE/ACM Transactions on Networking
Year: 2017, Volume: 25, Issue: 4
Pages: 2498 - 2513
IEEE Journals & Magazines
2.Location Privacy Attacks and Defenses in Cloud-Enabled Internet of Vehicles.Jiawen Kang, Rong
Yu, Xumin Huang, Magnus Jonsson, Hanna Bogucka, Stein Gjessing, and Yan Zhang. IEEE
Journals & Magazines
3. DATA ATTACKS ON CLOUD STORAGE
High Performance Computing and Communications; IEEE 14th International Conference on Smart
City; IEEE 2nd International Conference on Data Science and Systems (HPCC/SmartCity/DSS)
4. Data Security Enhancement in Public Cloud Storage Using Data Obfuscation and Steganography
B Fathima Mary, DI George Amalarethinam
5. A Server Side Encryption for Cloud Storage with Federation Sharing in Hybrid Cloud Environment
C. Gopinaath, C.Kiruthika
6 Accelerated encryption algorithms for secure storage and processing in the cloud

14. Atta Badii; Ryan Faulkner; Rajkumar Raval; Cornelius Glackin; Gérard Chollet
2017 International Conference on Advanced Technologies for Signal and Image Processing (ATSIP)
7.Decentralized Server-aided Encryption for Secure Deduplication in Cloud Storage
Youngjoo Shin; Dongyoung Koo; Joobeom Yun; Junbeom Hur
IEEE Transactions on Services Computing