www.chennaiuniversity.
net
Elective II CS 1014 INFORMATION SECURITY VII Sem CSE
QUESTION BANK - UNIT-IV
1) What is a policy?
A policy is
A plan or course of action, as of a government, political party, or business,
intended to influence and determine decisions, actions, and other matters
Policies are organizational laws
Standards, on the other hand, are more detailed statements of what must be
ChennaiUniversity.net
done to comply with policy
Practices, procedures, and guidelines effectively explain how to comply with
policy
For a policy to be effective it must be properly disseminated, read, understood
and agreed to by all members of the organization
2) Explain how information security policy is implemented as procedure?
3) What are the three types of security policies? Explain.
Types of Policy
Management defines three types of security policy:
• General or security program policy
• Issue-specific security policies
• Systems-specific security policies
Security Program Policy
A security program policy (SPP) is also known as
• A general security policy
www.chennaiuniversity.net
www.chennaiuniversity.net
• IT security policy
• Information security policy
Sets the strategic direction, scope, and tone for all security efforts within the
organization
An executive-level document, usually drafted by or with, the CIO of the
organization and is usually 2 to 10 pages long
Issue-Specific Security Policy (ISSP)
As various technologies and processes are implemented, certain guidelines are
needed to use them properly
The ISSP:
ChennaiUniversity.net
• addresses specific areas of technology
• requires frequent updates
• contains an issue statement on the organization’s position on an issue
Three approaches:
• Create a number of independent ISSP documents
• Create a single comprehensive ISSP document
• Create a modular ISSP document
Systems-Specific Policy (SysSP)
SysSPs are frequently codified as standards and procedures used
when configuring or maintaining systems
Systems-specific policies fall into two groups:
Access control lists (ACLs) consist of the access control lists,
matrices, and capability tables governing the rights and privileges
of a particular user to a particular system
Configuration rules comprise the specific configuration codes
entered into security systems to guide the execution of the system
4) What are ACL Policies?
ACL Policies
Both Microsoft Windows NT/2000 and Novell Netware
5.x/6.x families of systems translate ACLs into sets of
configurations that administrators use to control access to their
respective systems
ACLs allow configuration to restrict access from anyone and
anywhere
ACLs regulate:
o Who can use the system
o What authorized users can access
o When authorized users can access the system
o Where authorized users can access the system from
o How authorized users can access the system
4) What is Information Security Blueprint?
www.chennaiuniversity.net
www.chennaiuniversity.net
The Security Blue Print is the basis for Design,Selection and Implementation of
Security Policies,education and training programs,and technology controls.
The security blueprint is a more detailed version of the Security Framework,which
is an outline of the overall information security strategy for the organization and a
road map for the planned changes to the information security environment of the
organization.
The blueprint should specify the tasks to be accomplished and the order in which
they are to be realized.
It should serve as a scaleable,upgradable,and comprehensive paln for the
information security needs for coming years.
ChennaiUniversity.net
One approach to selecting methodology to develop an information security
bluepring is to adapt or adopt a published model or framework for information
security.
5) Define ISO 17799/BS 7799 Standards and their drawbacks
ISO 17799/BS 7799
One of the most widely referenced and often discussed security models is the
Information Technology – Code of Practice for Information Security
Management, which was originally published as British Standard BS 7799
This Code of Practice was adopted as an international standard by the
International Organization for Standardization (ISO) and the International
Electrotechnical Commission (IEC) as ISO/IEC 17799 in 2000 as a
framework for information security
Drawbacks of ISO 17799/BS 7799
Several countries have not adopted 17799 claiming there are fundamental
problems:
o The global information security community has not defined any
justification for a code of practice as identified in the ISO/IEC 17799
o 17799 lacks “the necessary measurement precision of a technical
standard”
o There is no reason to believe that 17799 is more useful than any other
approach currently available
o 17799 is not as complete as other frameworks available
o 17799 is perceived to have been hurriedly prepared given the
tremendous impact its adoption could have on industry information
security controls
6) What are the objectives of ISO 17799?
Organizational Security Policy is needed to provide management direction and
support
Objectives:
a. Operational Security Policy
b. Organizational Security Infrastructure
c. Asset Classification and Control
d. Personnel Security
e. Physical and Environmental Security
f. Communications and Operations Management
g. System Access Control
www.chennaiuniversity.net
www.chennaiuniversity.net
h. System Development and Maintenance
i. Business Continuity Planning
j. Compliance
7) What is the alternate Security Models available other than ISO 17799/BS
7799?
Another approach available is described in the many documents available from
the Computer Security Resource Center of the National Institute for Standards
and Technology (csrc.nist.gov) – Including:
NIST SP 800-12 - The Computer Security Handbook
ChennaiUniversity.net
NIST SP 800-14 - Generally Accepted Principles and Practices for Securing IT
Systems
NIST SP 800-18 - The Guide for Developing Security Plans for IT Systems
8) Explain NIST SP 800-14
Generally accepted Principles and practices for Security Inf Tech Sys
Provides best practices and security principles that can direct the security team in
the development of Security Blue Print.as given below:
o Security Supports the Mission of the Organization
o Security is an Integral Element of Sound Management
o Security Should Be Cost-Effective
o Systems Owners Have Security Responsibilities Outside Their Own
Organizations
o Security Responsibilities and Accountability Should Be Made Explicit
o Security Requires a Comprehensive and Integrated Approach
o Security Should Be Periodically Reassessed
o Security is Constrained by Societal Factors
o 33 Principles enumerated
9) Explain NIST SP 800-26
It serves as a Security Self Assesment Guide comprising of
Management Controls
– Risk Management
– Review of Security Controls
– Life Cycle Maintenance
– Authorization of Processing (Certification and Accreditation)
– System Security Plan
Operational Controls
– Personnel Security
– Physical Security
– Production, Input/Output Controls
– Contingency Planning
– Hardware and Systems Software
– Data Integrity
– Documentation
www.chennaiuniversity.net
www.chennaiuniversity.net
– Security Awareness, Training, and Education
– Incident Response Capability
Technical Controls
– Identification and Authentication
– Logical Access Controls
– Audit Trails
10) What is Sphere of protection?
Sphere of Protection
The “sphere of protection” overlays each of the levels of the “sphere of use” with
a layer of security, protecting that layer from direct or indirect use through the
ChennaiUniversity.net
next layer
The people must become a layer of security, a human firewall that protects the
information from unauthorized access and use
Information security is therefore designed and implemented in three layers
o policies
o people (education, training, and awareness programs)
o technology
11) What is Defense in Depth?
Defense in Depth
www.chennaiuniversity.net
www.chennaiuniversity.net
a. One of the foundations of security architectures is the requirement to
implement security in layers
b. Defense in depth requires that the organization establish sufficient security
controls and safeguards, so that an intruder faces multiple layers of
controls
ChennaiUniversity.net
12) What is Security perimeter?
Security Perimeter
– The point at which an organization’s security protection ends, and the
outside world begins
– Referred to as the security perimeter
– Unfortunately the perimeter does not apply to internal attacks from
employee threats, or on-site physical threats
www.chennaiuniversity.net
www.chennaiuniversity.net
ChennaiUniversity.net
13) What are the key technological components used for security
implementation?
Key Technology Components
Other key technology components
o A firewall is a device that selectively discriminates against information
flowing into or out of the organization
o The DMZ (demilitarized zone) is a no-man’s land, between the inside and
outside networks, where some organizations place Web servers
o In an effort to detect unauthorized activity within the inner network, or on
individual machines, an organization may wish to implement Intrusion
Detection Systems or IDS
www.chennaiuniversity.net
www.chennaiuniversity.net
ChennaiUniversity.net
www.chennaiuniversity.net
