Office of Campus Information Security

Driving a Security Architecture by Assessing Risk

Stefan Wahe (smwahe@wisc.edu)

Sr. Information Security Analyst

Realizing our Principles

• Answering the question, “Why?”

• To have a common understanding of building a secure architecture.

• Developed based on NIST 800-27,, ISO 20071, CIC schools, and other publications.

OCIS IT Security Principles

4. Security is a Common Understanding– Due Diligence; Manage Threats, Risks, and Costs;

and Incident Management.

3. Security is Asset Management– Classify Information; Least Privilege; and

Separation of Duties.

2. Security is Part of the Development Life Cycle– Information Privacy and Assurance; Usability; and

Defense in Depth.

1. Security is Everyone’s Responsibility

Risk Assessment Process

Step 1: Letter of Engagement

Step 2: Conduct the Assessment

Step 3: Draft Report on Findings

Step 4: Communicate Findings

Step 5: Re-Assess

Building a Common Understanding: Managing Risk

RiskImpact

Mitigation Controls$ Care $

$

Example Question

• Does the system maintain Configuration Management methodology that includes:1. A documented process for

reviewing, approving and implementing changes

2. Version control for software system components

3. Timely identification and installation of all applicable patches for any software used in the provisioning of the CS.

Common Gaps

• Common Security Gaps (examples)– The system infrastructure needs to be

segmented with robust firewall controls.

– Encryption controls and key management procedures should be implemented for data at rest.

– Restricted data needs to be sanitized in non-production environments.

– Intrusion detection, prevention and log management devices should be installed and maintained with appropriate alerting processes.

Integrating a Security Culture

• Awareness and Training– SANS Secure Web Development

• Policy Development and Best Practices– Restricted Information Management Practices– Desktop Encryption Policy

• Centralized Resources– Security Event Management– Network Management– Desktop Tools– PKI

Questions

• How can we help you?