The document discusses avoiding vulnerability in web applications due to SQL injection attacks. It proposes using encryption techniques like AES encryption and secure hashing to encrypt SQL queries before sending them to the database. The proposed system architecture encrypts the username and password during registration using AES encryption, and then hashes the encrypted value for storage in the database. This makes unauthorized access and SQL injection attacks more difficult. Screenshots show the protected login page working to help prevent SQL injection attacks.

1. LOYOLA – ICAM
COLLEGE OF ENGINEERING AND TECHNOLOGY (LICET)
Loyola College Campus, Nungambakkam , Chennai – 34
AVOIDING VULNERABILITY IN DATAADMITTANCE OF WEB APPLICATIONS
BASED ON ENCRYPTION TECHNIQUES
Done by
Guide
L.DIVYA [32810104013] Mr L REMEGIUS PRAVEEN SAHAYARAJ
V.PAVITHRA [32810104042]
P.SHANTHI PRIYA [32810104054]
Area Of Reasearch: Database Security

2. INTRODUCTION
• Area Of Research:
Database Security
• A less secure Web application design may allow crafted injection and malicious
update on the backend database. This trend can cause lots of damages and thefts of
trusted users sensitive data by unauthorized users
• Motivation of this Research
1. Encryption & hashing will provide more security in database.
2. SQL query is generated and encrypted by using AES technique which is further
hashed by a secure hashing technique.
• Web Application is a Three Tier Architecture with Client, Server & DataBase.
•

3. AGENDA
• Abstract.
• Existing system.
• Proposed system and its limitations.
• System Architecture and its advantages.
• Screenshots.
• Conclusion.
• References.

4. ABSTRACT
Web applications are steadily increasing in our daily routines activities and continue
to integrate them. Online Banking, On-line reservations, on-line shopping expect these web
applications to be secure and reliable the terror of SQL– Injection Attacks has become
increasingly frequent and serious. SQL Injection Attacks are one of the topmost threats for
web application security. Using SQL Injection attackers can leak confidential information:
such as credit card numbers, ATM pins, User credentials from web applications and even
corrupt the database. In this paper, some predefined methods are discussed and integrated
approach of encryption method with secure hashing is applied in the database to avoid
attack on each and every phase.

5. EXISTING SYSTEM
• Tame-card detection and prevention
• Functionality of temporary authentication
• Vulnerability detection
-Static analysis
-Dynamic analysis
• Predefined method and hybrid encryption methods applied
• Hash value approach with SQLIPA prototype
• Runtime attack prevention
- Client side prevention
- Server side prevention

6. LIMITATIONS
• SQL Injection has become a common issue with database-driven web sites. The
flaw is easily detected, and easily exploited, and as such, any site or software
package with even a minimal user base is likely to be subject to an attempted
attack of this kind.
• Essentially, the attack is accomplished by placing a meta character into data input
to then place SQL commands in the control plane, which did not exist there
before. This flaw depends on the fact that SQL makes no real distinction between
the control and data planes.

7. Literature survey
Title Work done Inference
Detection of SQL Injection Attack
and Various Prevention Strategies.
This paper presents a security methods we are able to
reduce the total number of alerts from four to zero alert
by scanning the website using vulnerability tool. SQL
Injection attack occurs due to vulnerabilities present in
the website that allows the hacker to by passes the
SQL statements and hence enters into the database
queries directly. SQL Injection is the first step in entry
to exploiting or hacking any website available on
internet.
Got Clear Idea about Attacks
and this algorithm is like
mutation based so it takes
plenty of time to identify the
attacks
Protection of Web Application
againstSql Injection Attacks
In this paper, various types of SQL injection attacks as
well as predefined prevention methods are discussed.
Then the hybrid encryption method is used which
includes AES encryption and Rabin’s cryptosystem.
The reason behind the use of two layer of encryption is
that it will be more secured. SQL query is generated
and encrypted by Rabin’s cryptosystem because even
if hackers hack the information and decode the AES
encryption part, it will still be more difficult for them
to know about the encrypted query
Add some more security to
databases to avoid SQL
injection attack.

8. Cont..
SQL INJECTION Attacks
in Web Application
In this paper, we have presented the rst formal
definition of command injection attacks in web
applications. Based on this definition, we have
developed a sound and complete runtime checking
algorithm for preventing command injection attacks
and produced a working implementation of the
algorithm.
SQLCIAs precisely and
incurred low runtime overhead.
Review of SQL Injection
Attack and Proposed
Method for Detection and
Prevention of SQLIA
This paper also contains strengths and weaknesses
of various SQL injection attacks. At last we also
proposed the scheme to handle the SQLIA and
strong enough to prevent them. The use of internet
increases day by day. As the number of computer
users increases, the number reported cases of
cybercrime increases. While, on the other side, the
organization increases the use of office automation
software & services, that helps them to maintain the
confidential information with less efforts.
A new approach that is
completely based on the hash
method of using the SQL
queries in the web-based
environment, which is much
secure and provide the
prevention from the attackers
SQL.

9. PROPOSED SYSTEM
• AES encryption and combined approach of secure hashing on encryption.
• By applying encryption technique, database attacks can be prevented.
Encryption of data basically helps to change the data into a form that is not
readable. Without the correct key, this format can’t be deciphered even if
attacker hacks the information. Application of encryption in login phase
makes it difficult for unauthorized users to access the database.

10. ADVANTAGES
• Confidentiality: Since SQL databases generally hold sensitive data, loss of
confidentiality is a frequent problem with SQL Injection vulnerabilities.
• Authentication: If poor SQL commands are used to check user names and
passwords, it may be possible to connect to a system as another user with no
previous knowledge of the password.
• Authorization: If authorization information is held in a SQL database, it may be
possible to change this information through the successful exploitation of a SQL
Injection vulnerability.
• Integrity: Just as it may be possible to read sensitive information, it is also
possible to make changes or even delete this information with a SQL Injection
attack.

11. OVERALL SYSTEM ARCHITECTURE
Username
Password
Encrypted AES
Code
AES SHA1
SHA(AES)
Username &
Password
Registration Encrypted
string of
Username &
Password
Data
Base
Access
Permitted
Value
check
in DB
No Access SQL
Injection Attack
Authentication
Schemes
Login
Interface

12. OVERALL SYSTEM ARCHITECTURE
• SQL injection attacks are nothing but injecting malicious queries by the hackers into the
application projected queries to get the desired outputs from the database. SQL Injection
allows an attacker to create, read, update, modify, or delete data stored in the back-end
database.
• While Typing SQL keywords and control signs an intruder is able to modify the structure
of SQL query developed by a Web designer.
• SQL Injection attacks can take place when a web application utilizes user-supplied data
without proper validation or encoding as part of a command or query

13. RESULTS
Registering the username and password in the login
page
Username and Password stored in the
login table

14. Unprotected login page Protected Login

15. Exit page

16. CONCLUSION
• SQL query is generated and encrypted by using AES technique which is further hashed by a secure hashing
technique and as we know hashed codes is a one way encryption technique thus it is not possible to decode it.
This proposed integrated approach is an effort to add some more security measures to databases to avoid SQL
injection attack.
• The web-application code perfectly contains a policy that allows distinguishing lawful and malicious queries.
• This area is in need of more research, mainly because of various reasons: SQL injection attacks are most
probable to change and new vulnerabilities will be found, collectively with new countermeasures to deal with
them. As many hacking sites are existing on the web, and since attack methods are well described and
circulated between hackers, we believe that information about new attack methods must be constantly
surveyed and new counter measures should be developed.
• So, in future, a new technique can be developed so that it is capable for other varieties of SQL Injection
Attacks also. Due to which, this technique will be able to prevent SQL Injection Attack totally.

17. REFERENCES
[1] Priyanka, Vijay Kumar Bohat, (April 2013) ’Detection of SQL Injection Attack and Various Prevention Strategies’, International
Journaand Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-2, Issue-4.
[2] Sonam Panda, 1 Ramani S2,(Jan-Feb.2013),’Protection of Web Application against Sql Injection Attacks ‘, International Journal of
Modern Engineering Research (IJMER) Vol.3, Issue.1, pp-166-168 ISSN: 2249-6645.
[3] Mihir Gandhi, JwalantBaria,( January 2013)’SQL INJECTION Attacks in Web Application’International Journal of Soft Computing
and Engineering (IJSCE) ISSN: 2231-2307, Volume-2, Issue-6.
[4] By Mayank Namdev*, Fehreen Hasan, Gaurav Shrivastav(July 2012) ‘Review of SQL Injection Attack and Proposed Method for
Detection and Prevention of SQLIA”Volume 2, Issue 7.
[5] Shubham Srivastava1, Rajeev Ranjan Kumar Tripathi, ‘Attacks Dueto SQL Injection & Their Prevention Method for Web-Application
(IJCSIT) International Journal of Computer Science and InformationTechnologies, Vol. 3 (2) , 2012,3615-3618.
[6] Indrani Balasundaram, E.Ramaraj,’An Authentication Scheme forPreventing SQL injection Attack using Hybrid Encryption’ (ISSN
1450-216,2011, Vol.53,pp.359-368.
[7] AtefehTajpour et al. ‘Evaluation of SQL Injection Detetion andPrevention Techniques’ Second International Conference
onComputational Intelligence, 2010.
[8] Shaukat Ali, Azhar Rauf, Huma Javed,’SQLIPA: An Authentication Mechanism Against SQL Injection’, European Journal of
Scientific
Research ISSN 1450-216X Vol.38 No.4 (2009), pp 604-611.
[9] Sayyed Mohammad Sadegh Sajjadi and Bahare Tajalli Pour,( September 2013) ‘Study of SQL Injection Attacks and
Countermeasures’, International Journal of Computer and Communication Engineering, Vol. 2, No. 5.
[10] W. G. Halfond, J. Viegas, and A. Orso , ‘A Classification of SQLInjection Attacks and Countermeasures,’ in Proc. the International
Symposium on Secure Software Engineering 2006.

18. THANK YOU