SECURITY POLICIES Indu Ramachandran Outline n n n

SECURITY POLICIES Indu Ramachandran

Outline n n n n General idea/Importance of security policies When security policies should be developed Who should be involved in this process Cost of security policies Available resources Security policies in detail Failure of Security policies After Security policy is written

About Security Policies n n n Increased level of threats Organization’s attitude towards security policies Establishing Standards More than just “Keeping the bad guys out”! Management and Security policy Policies Not Procedures!!

Importance of Security Policies n Establishes Standards n Provides basic guidelines n Defines appropriate behavior n Helps against being sued

Aspects of Security n Traditional Ideas of Security n Revised Security aspects n Confidentiality n Protect info n objects from unauthorized release/use of Integrity n Preserve objects / avoid unauthorized modification

When should Policies be developed n Ideal Scenario n n n Often not the case After a Security Breach To mitigate Liability For document compliance To demonstrate quality control processes Customers/Clients requirements

Who should be involved n n n Basically EVERYONE!!!!! System users System support personnel Managers Business lawyers

Importance of Involving Management n Funding and Commitment n Leadership n Authority n Responsibility/Support

Do you need Sec. Policies? ? Questions to answer this question… Ø Ø Ø Do workers at your organization handle information that is confidential? Do workers at your organization access the internet? Does your organization have trade secrets? Custom questions to suit you!!

The Security Cost Function n n Cost for security Exponential increase Trade off between cost for security and cost of violations Formula for calculating cost : Total cost for Violations = Cost for a single Violation X frequency of the violation

GOOD NEWS!!!! You are not on your own !!! v Internet Resources v v The SANS institute NIST (National Inst. Of Stds. And Technology) RFC Universities

Resources (cont’d) v Books v v Guide for Developing Security Policies for Information Technology Systems Information Security Policies made easy v v v around 1360+ security templates used by several large organizations Training Sessions v SANS Institute

Types of security policies n Administrative Security Policy n Examples of Administrative sec policies: Users must change password each quarter n Employees must not use dial out modems from their desktops. n n Technical sec policies n Examples n Server will be configured to expire password each quarter n Accounts must initiate a lockout after four unsuccessful attempts to login

What is in a security policy Three Categories First category – Parameters Section Ø Ø Ø Introduction Audience Definitions

What is in a security policy (cont’d) The Second category Ø Risk assessments Ø When this should be done Ø Benefits Ø Who should do this Ø Ø Identifying Assets Threats to assets

What is in a security policy (cont’d) The Third Category Ø Actual Policies Examples of policies n Physical security

Examples of policies (cont’d) n Authentication n Password policy n Remote Access Policy n The Modem Issue

Examples of policies (cont’d) n Acceptable Use Policy Examples of AU Policy at http: //www. eff. org/pub/CAF/policies n Other Policies Examples of policies as well as their templates on the SANS website. http: //www. sans. org/resources/policies/

What makes a good security policy n n n Must be usable Must communicate clearly Must not impede/interfere with business Enforceable Update regularly Other factors n n Interests Laws

Problems with Sec. Policies n Increase in tension level n Security needs viewed differently n Too restrictive/hard to implement n Impediments productivity

Conflict and Politics n Management concentrates on goals for company n Technical Personnel’s agenda So what happens? ? ? What do you do? ? ?

Information Security Management Committee n Bridge the gap n Committee Composition n Responsibilities of the committee

Real world problems caused by missing policies n At A Government Agency. . . n At A Local Newspaper. . .

Why Security Policies Fail n Security is a barrier to Progress n n n Perceived to have zero benefit Obstacles/Impediment productivity Security is a learned behavior n n n Not instinct Value of assets Not taken seriously

Why Security Policies Fail (cont’d) n n Complexity Security work is never finished n n Failure to review Other reasons n n Lack of stake holder support Organizational Politics

Compliance & Enforcement n Training n Testing and effectiveness of the policy n Monitoring n Taking Action

Review The Policy n Review Committee n n Good representation Frequency of review meetings Responsibilities What to Review

References n n n n Barham, Scott - Writing information security policies http: //dmoz. org/Computers/Security/Policy/Sample_Poli cies/ http: //www. netiq. com/products/pub/ispme_realproblems. asp http: //www. sans. org/rr/policy. php http: //www. networknews. co. uk/Features/1138373 http: //irm. cit. nih. gov/security/sec_policy. html http: //www. cisco. com/warp/public/126/secpol. html