2. What is security?
The quality or state of being secure to be
free from danger
Security is achieved using several strategies
simultaneously or used in combination with
one another
Security is recognized as essential to protect
vital processes and the systems that provide
those processes
Security is not something you buy, it is
something you do
3. OBJECTIVES
• Explain why information systems need
special protection from destruction,
error, and abuse
• Assess the business value of security
and control
• Evaluate elements of an organizational
and managerial framework for security
and control
4. OBJECTIVES
Identify the challenges posed by
information systems security and control
and management solutions
Why are information systems so
vulnerable to destruction, error, abuse,
and system quality problems?
What types of controls are available for
information systems?
5. Vulnerability, Threat and Attack
A vulnerability:- is a weakness in security
system
◦ Can be in design, implementation, etc.
◦ Can be hardware, or software
A threat:- is a set of circumstances that has the
potential to cause loss or harm
◦ Or it’s a potential violation of security
◦ Threat can be:
Accidental (natural disasters, human error,
…)
Malicious (attackers, insider fraud, …)
An attack:- is the actual violation of security
6. Why Systems are Vulnerable?
Hardware problems-
• Breakdowns, configuration errors, damage
from improper use or crime
Software problems-
• Programming errors, installation errors,
unauthorized changes)
Disasters-
• Power failures, flood, fires, etc.
Use of networks and computers outside of
firm’s control -
• E.g. with domestic or offshore outsourcing
vendors
7. SYSTEM VULNERABILITY
AND ABUSE
Concerns for System Builders and Users
Disaster
Destroys computer hardware, programs, data
files, and other equipment
Security
Prevents unauthorized access, alteration, theft,
or physical damage
8. SYSTEM VULNERABILITY
AND ABUSE
Concerns for System Builders and Users
Errors-
Cause computers to disrupt or destroy
organization’s record-keeping and
operations
Bugs-
Program code defects or errors
Maintenance Nightmare-
Maintenance costs high due to
organizational change, software complexity,
and faulty system analysis and design
9. RISKS & THREATS
Theft, Virus Attacks Systems &
High User Network
Knowledge Sabotage,
Misuse Failure
of IT
Systems
Natural
Lack Of Lapse in Physical Security Calamities & Fire
Documentation
11. BUSINESS VALUE OF
SECURITY AND CONTROL
• Inadequate security and control may create
serious legal liability.
• Businesses must protect not only their own
information assets but also those of
customers, employees, and business
partners. Failure to do so can lead to costly
litigation for data exposure or theft.
• A sound security and control framework that
protects business information assets can thus
produce a high return on investment.
12. ESTABLISHING A MANAGEMENT
FRAMEWORK FOR SECURITY AND
CONTROL
General controls:
Establish framework for controlling
design, security, and use of computer
programs
• Software controls
• Hardware controls
• Computer operations controls
• Data security controls
• Implementation controls
13. ESTABLISHING A MANAGEMENT
FRAMEWORK FOR SECURITY AND
CONTROL
Application controls:
Unique to each computerized
application
• Input
• Processing
• Output
14. CREATING A CONTROL
ENVIRONMENT
Controls:-
• Methods, policies, and procedures
• Ensures protection of organization’s
assets
• Ensures accuracy and reliability of
records, and operational adherence to
management standards
16. CREATING A CONTROL
ENVIRONMENT
Disaster recovery plan:
Runs business in event of
computer outage
Load balancing:
Distributes large number of
requests for access among multiple
servers
17. CREATING A CONTROL
ENVIRONMENT
• Mirroring:
Duplicating all processes and transactions of
server on backup server to prevent any
interruption
• Clustering:
Linking two computers together so that a
second computer can act as a backup to the
primary computer or speed up processing
18. CREATING A CONTROL
ENVIRONMENT
Internet Security Challenges
Firewalls:-
• Hardware and software controlling flow of incoming
and outgoing network traffic
• Prevent unauthorized users from accessing private
networks
• Two types: proxies and stateful inspection
Intrusion Detection System:-
• Monitors vulnerable points in network to detect and
deter unauthorized intruders
20. CREATING A CONTROL
ENVIRONMENT
Internet Security
• Challenges
Encryption: -
Coding and scrambling of messages to prevent
their access without authorization
• Authentication: -
Ability of each party in a transaction to
ascertain identity of other party
• Message integrity: -
Ability to ascertain that transmitted message has
not been copied or altered
21. CREATING A CONTROL
ENVIRONMENT
Internet Security Challenges
Digital signature: -Digital code attached to
electronically transmitted message to uniquely
identify contents and sender
Digital certificate: -Attachment to electronic
message to verify the sender and to provide
receiver with means to encode reply
Secure Electronic Transaction (SET): -
Standard for securing credit card transactions over
Internet and other networks
22. USER RESPONSIBILITIES
Access Control - Physical
• Follow Security Procedures
• Wear Identity Cards
• Ask unauthorized visitor his
credentials
• Attend visitors in Reception and
Conference Room only
• Bring visitors in operations area without prior
permission
• Bring hazardous and combustible material in
secure area
• Practice “Piggybacking”
• Bring and use pen drives, zip drives, ipods,
other storage devices unless and otherwise
authorized to do so
23. USER RESPONSIBILITIES
Password Guidelines
Always use at least 8 character password with
combination of alphabets, numbers and special
characters (*, %, @, #, $, ^)
Use passwords that can be easily remembered by
you
Change password regularly as per policy
Use password that is significantly different from
earlier passwords
Use passwords which reveals your personal
information or words found in dictionary
Write down or Store passwords
Share passwords over phone or Email
Use passwords which do not match above complexity
criteria
24. USER RESPONSIBILITIES
Internet Usage
Use internet services for business purposes only
Do not access internet through dial-up
connectivity
Do not use internet for accessing auction sites
Do not use internet for hacking other computer
systems
Do not use internet to download / upload
commercial software / copyrighted material
Technology Department is continuously
monitoring Internet Usage. Any illegal use of
internet and other assets shall call for
Disciplinary Action.
25. CREATING A CONTROL
ENVIRONMENT
Antivirus Software
Antivirus software: -
Software that checks computer
systems and drives for the presence of
computer viruses and can eliminate the
virus from the infected area
• Wi-Fi Protected Access specification
26. This NEC PC
has a biometric
fingerprint
reader for fast
yet secure
access to files
and networks.
New models of
PCs are starting
to use biometric
identification to
authenticate
27. MANAGEMENT OPPORTUNITIES,
CHALLENGES AND SOLUTIONS
oManagement Opportunities: -
Creation of secure, reliable Web sites and
systems that can support e-commerce and e-
business strategies
28. MANAGEMENT
CHALLENGES
Designing systems that are neither over-controlled
nor under-controlled
provide network and infrastructure security to a
financial services firm in a Web-enabled high-threat
environment
29. MANAGEMENT
CHALLENGES
Implementing an effective security policy
Applying quality assurance standards in large
systems projects
What are the most important software quality
assurance techniques?
Why are auditing information systems and
safeguarding data quality so important?
30. Solution Guidelines
• Security and control must become a more visible and
explicit priority and area of information systems
investment.
• Support and commitment from top management is
required to show that security is indeed a corporate
priority and vital to all aspects of the business.
• Security and control should be the responsibility of
everyone in the organization.
31. Human Wall Is Always
Better Than A Firewall
. . . LET US BUILD A HUMAN WALL ALONG WITH FIREWALL