database management system

1. Database Security And
Authentication
Submitted To:
Dr. Mohammad Arifuzzaman

2. PRESENTED BY:-
• Md. Shakhawat Hossain
– 2012-2-55-067
• Jisan Ahmed Limon
– 2014-3-55-010
• Sudeb Das
– 2014-2-55-023

3. 3
Database Security
• Database Security - protection from
malicious attempts to steal (view) or
modify data.

4. What is Security And Authentication
Security definition: Data security refers to
protective digital privacy measures that are
applied to prevent unauthorized access to
computers, databases and websites.
Authentication Definition: Authentication is
the process of recognizing a user's identity. It is
the mechanism of associating an incoming
request with a set of identifying credentials

5. 4 Keys of Authentication
Data security is also known as information
security (IS) or computer security.
Introduction to User Authentication: A
basic security requirement is that you must
know your users. You must identify them
before you can determine their privileges
and access rights, and so that you can audit
their actions upon the data.

6. Passwords for Authentication
Passwords are one
of the basic forms of
authentication.
A user must provide
the correct
password when
establishing a
connection to
prevent
unauthorized use of
the database.

7. Strong Authentication
Strong authentication has important
advantages:
More choices of authentication mechanism
are available, such as smart cards,
Kerberos, or the operating system.
Many network authentication services, such
as Kerberos and DCE, support single sign-
on.

8. Proxy Authentication and Authorization
It enables the database administrator to regulate
which users are allowed to access the database
server through a given application.
It enables the administrator to audit actions of the
application acting on behalf of a given user.

9. DATA PRIVACY

11. The security of the location
where the database is stored
 Even if you know that the
contents of a database file
are safe, if the file is stored
in a location that is not fully
secure.
 Someone might introduce
unsafe content into the
database.
 You should be careful when
deciding to trust database
files that are stored in
locations that might not be
secure.

12. WHY NEED DATABASE SECURITY

13. Level of data security
 Human level
 Corrupt/careless user
 Network/user interface
 Database application program
 Database system
 operating system
 Physical level

14. 14
Physical/OS Security
• Physical level
– Traditional lock-and-key security
– Protection from floods, fire, etc.
• E.g. WTC (9/11), fires in IITM, WWW conf website, etc.
– Protection from administrator error
• E.g. delete critical files
– Solution
• Remote backup for disaster recovery
• Plus archival backup (e.g. DVDs/tapes)
• Operating system level
– Protection from virus/worm attacks critic

15. Database and Application Security, Nov 2006
15
Security at the Database
• Authentication and
authorization
mechanisms to allow
specific users access
only to required data
• Authentication: who
are you? Prove it!
• Authorization: what
you are allowed to do

16. SECURITY Policies
Database security officer secures the
system and data
 Work with the database administrator.
Security policy
 Collection of standards, policies, procedures to guarantee security.
 Ensures auditing and compliance
 Security audit process identifies security vulnerabilities.

17. Security Pearls
Back up key files
Use encryption on sensitive data
Use good passwords
Network security requires expertise
 authentication
 encryption
 firewalls

18. 18
User Authentication
• Password
– Most users abuse passwords. For e.g.
• Easy to guess password
• Share passwords with others
• Smartcards
– Need smartcard
– + a PIN or password
Bill Gates

19. Conclusion
 The goal of database security is to protect your critical
and confidential data from unauthorized access.
 Each organization should have a data security policy,
which is a set of high level guidelines determined by
 User requirements.
 Environmental aspects.
 Internal regulations
 Governmental law

20. Any Question???