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Authentication Policy

Document ID: AUTH-001
Version: 1.0
Effective Date: ____________________
Approved By: ____________________
Last Review Date: ____________________
Next Review Date: ____________________

1. Purpose

The purpose of this Authentication Policy is to establish requirements for verifying the identity of users, devices, applications, and services before granting access to organizational resources.

Strong authentication protects organizational systems and data from unauthorized access, supports Zero Trust security principles, and helps ensure compliance with applicable legal, regulatory, and contractual requirements.

2. Scope

This policy applies to:

  • Employees
  • Contractors
  • Consultants
  • Temporary workers
  • Interns
  • Volunteers
  • Board members
  • Vendors
  • Third-party service providers
  • Managed Service Providers (MSPs)

This policy also applies to:

  • Service accounts
  • Application identities
  • API identities
  • Device identities
  • Cloud workload identities

The policy applies to authentication for:

  • Directory services
  • Cloud identity providers
  • Business applications
  • Email systems
  • Collaboration platforms
  • Databases
  • VPNs
  • Remote access systems
  • Network devices
  • Cloud services
  • Web applications
  • Mobile applications
  • Administrative interfaces

3. Policy Statement

All users, devices, applications, and services shall be authenticated using approved methods before access to organizational resources is granted.

Authentication mechanisms shall be appropriate for the sensitivity of the information, the risk associated with the resource being accessed, and applicable regulatory or contractual requirements.

4. Guiding Principles

The organization follows these principles:

  • Verify Explicitly
  • Least Privilege
  • Zero Trust
  • Defense in Depth
  • Strong Authentication
  • Individual Accountability
  • Secure by Default
  • Continuous Verification

5. Authentication Factors

Authentication may use one or more of the following factors:

Knowledge Factors (Something You Know)

  • Passwords
  • Passphrases
  • Personal Identification Numbers (PINs)

Possession Factors (Something You Have)

  • Hardware security keys
  • Authenticator applications
  • Smart cards
  • One-time password (OTP) tokens
  • Digital certificates

Inherence Factors (Something You Are)

  • Fingerprints
  • Facial recognition
  • Iris recognition
  • Other approved biometric methods

Authentication should use the strongest practical combination of factors based on risk.

6. Multi-Factor Authentication (MFA)

Multi-Factor Authentication (MFA) shall be required for:

  • Administrative accounts
  • Remote access
  • VPN connections
  • Cloud administration
  • Privileged systems
  • Financial systems
  • Human Resources systems
  • Remote management tools
  • High-risk applications
  • Other systems identified through risk assessment

Where technically feasible, MFA should also be enabled for all standard user accounts.

7. Password and Passphrase Requirements

Passwords and passphrases shall comply with the organization’s Password Policy.

Authentication systems shall:

  • Protect stored credentials using approved cryptographic methods.
  • Prevent transmission of passwords in clear text.
  • Support secure password changes.
  • Prevent unauthorized credential disclosure.

8. Passwordless Authentication

Where technically supported, passwordless authentication methods are encouraged.

Approved methods may include:

  • Passkeys
  • Hardware security keys
  • Smart cards
  • Certificate-based authentication
  • Biometric authentication used in combination with approved security controls

Passwordless authentication should provide security equal to or greater than traditional password-based methods.

9. Risk-Based Authentication

Authentication systems should evaluate contextual factors before granting access.

Risk indicators may include:

  • Geographic location
  • Device health
  • IP address reputation
  • Network location
  • Time of access
  • User behavior
  • Impossible travel detection
  • Threat intelligence
  • Known malicious activity

Higher-risk authentication attempts may require additional verification or be denied.

10. Single Sign-On (SSO)

Where appropriate, Single Sign-On (SSO) may be used to improve both security and user experience.

SSO implementations shall:

  • Integrate with approved identity providers
  • Support Multi-Factor Authentication
  • Follow secure federation standards
  • Be centrally managed
  • Be monitored for security events

11. Federated Authentication

Federated authentication may be used with trusted identity providers.

Federation relationships shall:

  • Be approved
  • Be documented
  • Be periodically reviewed
  • Follow organizational trust requirements

12. Device Authentication

Devices connecting to organizational resources should be authenticated where technically feasible.

Device authentication may include:

  • Device certificates
  • Trusted Platform Modules (TPMs)
  • Endpoint management enrollment
  • Device compliance verification
  • Hardware identifiers

Untrusted or non-compliant devices may receive restricted access.

13. Service and Application Authentication

Applications, services, APIs, and automation processes shall authenticate using approved methods.

Authentication mechanisms may include:

  • Managed identities
  • Service accounts
  • Mutual TLS (mTLS)
  • API keys
  • OAuth tokens
  • Certificates

Hard-coded credentials shall be avoided whenever technically feasible.

14. Session Management

Authenticated sessions shall be managed securely.

Controls should include:

  • Session timeouts
  • Automatic session expiration after inactivity
  • Session termination upon logout
  • Secure session identifiers
  • Protection against session hijacking
  • Reauthentication for high-risk actions where appropriate

Session duration standards shall be defined in supporting technical documentation.

15. Failed Authentication

Authentication systems shall detect repeated failed authentication attempts.

Protective controls may include:

  • Account lockout
  • Authentication throttling
  • Progressive delays
  • CAPTCHA
  • Risk-based authentication
  • Administrative alerting

Authentication failures shall be logged and monitored.

16. Credential Recovery

Credential recovery processes shall:

  • Verify user identity
  • Protect against social engineering
  • Require secure recovery methods
  • Be documented
  • Be logged where appropriate

Temporary credentials shall be changed immediately after first use where applicable.

17. Monitoring and Logging

Authentication systems shall log, where technically feasible:

  • Successful authentication
  • Failed authentication
  • Multi-Factor Authentication events
  • Password changes
  • Credential recovery events
  • Privileged logins
  • Authentication policy changes
  • Session terminations
  • Administrative actions

Logs shall be protected from unauthorized modification.

18. Authentication Exceptions

Exceptions to authentication requirements require:

  • Documented business justification
  • Risk assessment
  • Management approval
  • Information Security approval where applicable
  • Compensating security controls
  • Periodic review

19. Responsibilities

Executive Management

  • Support secure authentication practices
  • Allocate appropriate resources
  • Approve governance requirements

Managers

  • Approve authentication-related access requests
  • Support enforcement of authentication requirements

IT Department

  • Implement authentication systems
  • Configure authentication controls
  • Maintain identity infrastructure
  • Monitor authentication services
  • Respond to authentication issues

Information Security

  • Define authentication standards
  • Review authentication technologies
  • Monitor authentication events
  • Investigate authentication-related incidents
  • Assess compliance

System Owners

  • Ensure applications support approved authentication methods
  • Participate in authentication reviews

Users

  • Protect authentication credentials
  • Use approved authentication methods
  • Report suspected credential compromise immediately
  • Comply with organizational authentication requirements

20. Compliance

Compliance with this policy is mandatory.

Violations may result in:

  • Removal of access
  • Suspension of privileges
  • Disciplinary action
  • Contract termination
  • Legal action where applicable

21. Policy Review

This policy shall be reviewed at least annually or following:

  • Significant technology changes
  • Authentication system upgrades
  • Security incidents
  • Regulatory updates
  • Audit findings

22. Related Policies

  • Information Security Policy
  • Access Control Policy
  • Identity Lifecycle Management Policy
  • Directory Services Policy
  • Password Policy
  • Multi-Factor Authentication (MFA) Policy
  • Least Privilege Policy
  • Privileged Access Management (PAM) Policy
  • Remote Access Policy
  • Account Lockout Policy
  • Logging and Monitoring Policy
  • Incident Response Policy

Document Objective

This policy establishes the organization’s requirements for securely authenticating users, devices, applications, and services before granting access to organizational resources. It provides a vendor-neutral framework for implementing modern authentication practices across on-premises, cloud, and hybrid environments while supporting Zero Trust principles, reducing the risk of unauthorized access, and promoting secure identity verification. This policy aligns with recognized security frameworks, including NIST CSF, ISO/IEC 27001, CIS Controls, SOC 2, HIPAA, PCI DSS, CMMC, and the FTC Safeguards Rule.