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Risk Methodology for UOCAVA Voting Systems. TGDC Presentation Matt Scholl NIST, Information Technology Laboratory, Computer Security Division http://vote.nist.gov. Purpose Tutorial on Risk Methodology Definition of Terms Categorization Process Risk Decisions

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Risk methodology for uocava voting systems

Risk Methodology for UOCAVA Voting Systems

TGDC Presentation

Matt Scholl

NIST, Information Technology Laboratory,

Computer Security Division

http://vote.nist.gov


Agenda

Purpose

Tutorial on Risk Methodology

Definition of Terms

Categorization Process

Risk Decisions

Applying Risk Methodology to Voting

Agenda


Purpose
Purpose

  • Present a methodology to solicit decisions and drive requirements for voting systems.

  • The methodology is based on the NIST Risk Management Framework.

    • A foundational approach for information system security used throughout U.S., state and local Governments, private industry, and other governments world-wide.

    • Use terms and definitions found in NIST information system security publications, standards and Federal laws.


Goal

  • The process will result in a set of security, auditability, human factors (usability, accessibility) mitigations molded to fit various voting architectures with varying levels of assurance and capabilities.

  • NIST will assist the TGDC in identifying and applying a risk methodology to UOCAVA voting systems.

  • The Risk Management Framework is used to make specific risk based decisions.

Security

Auditability

Accessibility/

Usability


Risk methodology tutorial
Risk Methodology Tutorial

  • Brief the TGDC on NIST risk methodology for developing security controls.

  • Ensure the TGDC understands the information needed by NIST to develop the controls.

  • Define key terms.


Security objectives
Security Objectives

  • Confidentiality

    • Preserving authorized restrictions on information access and disclosure, including means for protection of personal privacy and proprietary information.

  • Integrity

    • Guarding against improper information modification or destruction, and include ensuring information non-repudiation and authenticity.

  • Availability

    • Ensuring timely and reliable access to and use of information.

      Source: 44 U.S.C Sec. 3542


Risk approach
Risk Approach

  • Risk is a function of the following:

    • Likelihood

    • Threat

    • Vulnerability

    • Impact

  • The NIST Risk Management Framework begins with assessing the potential impact on an organization should events occur to jeopardize the information and information system.


Examples of voting information types
Examples of Voting Information Types

  • Example types of voting information:

    • Voted Ballot

    • Blank Ballot

    • Tabulation Reports

  • Example threats:

    • Loss of ballot secrecy

    • Incorrect ballot received by voter

    • Tabulation Reports cannot be accessed by voting officials



Impact levels
Impact Levels

  • High Impact – severe or catastrophic adverse effect

  • Moderate Impact – serious adverse effect

  • Low Impact – limited adverse effect

  • Why is this important?

    • Common framework for expressing security needs.

    • Aids in selection of appropriate security controls.

    • TGDC identifies possible criteria for determining voting-specific impact.

      Source: FIPS 199




Voting categorization step 3

Confidentiality

Voted Ballot

Loss of Ballot Secrecy

Low Impact

Moderate Impact

High Impact

Voting Categorization – Step 3


Voting categorization step 31

Confidentiality

Voted Ballot

Loss of Ballot Secrecy

Low Impact

Moderate Impact

High Impact

Voting Categorization – Step 3


Security control identification

Moderate Impact

Level

Examples of Architecture Types

Electronic Delivery/Mail Return

Kiosk

PC-based

Security Controls

Security Controls

Security Controls

Security Control Identification


Security control identification1
Security Control Identification

  • Use the NIST SP 800-53 “NIST Recommended Security Controls for Federal Information Systems”.




Next steps for security
Next Steps for Security

  • TGDC identifies possible:

    • Information types

    • Voting threats

    • Voting-specific impact criteria

  • NIST assists the TGDC in identifying and tailoring security controls for all impact levels and all architectures.

  • Refine security controls as architectures mature.

  • An impact level can be selected for each information type.

  • Using risk assessment – refine security controls as threats and vulnerabilities become known.


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