High School AdvancedA19.8Cybersecurity Portfolio Projects

Lesson A19.8

Cloud Security Review Project

A cloud security review asks whether identity, data, services, dependencies, visibility, recovery, and governance work together to protect the organization's goals. It also asks whether security responsibilities are actually understood and owned.

This project is provider-neutral, fictional, and non-operational. You will review supplied Northbridge architecture and synthetic evidence. You will not sign in to, scan, configure, test, or investigate any real cloud account or environment.

Lesson Progress

Cloud Security Review Project

High School AdvancedA19: Cybersecurity Portfolio Projects • Lesson 8 of 10

80% complete

Readiness Check

Before You Start

0/4 ready

Professional Hook

Moving to the Cloud Does Not Move Every Security Decision to the Provider

Cloud services can reduce the amount of infrastructure an organization must operate directly, but they do not eliminate the need for security design. Someone still decides who receives access, which data is stored, how services communicate, which logs matter, how exceptions work, and what happens when an important dependency is unavailable.

A professional cloud review therefore begins with responsibility. The reviewer asks which platform capabilities the provider supplies and which outcomes still depend on customer decisions. That prevents two common mistakes: assuming the provider handles everything, or assuming the customer must operate every layer itself.

Learning Objectives

Five Outcomes for A19.8

1

Explain how a cloud security review evaluates shared responsibility, identity, data, network boundaries, logging, resilience, configuration governance, and ownership without assuming the cloud provider manages every security decision.

2

Review fictional cloud architecture and evidence by separating confirmed design facts, policy requirements, control evidence, assumptions, exceptions, and unknowns.

3

Identify defensible cloud findings involving least privilege, storage exposure, workload identity, telemetry, recovery, dependency concentration, and lifecycle governance without teaching exploitation or real-system testing.

4

Prioritize cloud security recommendations using business impact, control strength, evidence confidence, operational dependencies, residual risk, ownership, and validation needs.

5

Create a portfolio-ready Cloud Security Review Project that demonstrates provider-neutral architecture reasoning, evidence discipline, safe recommendations, governance, and professional communication.

Core Teaching

Eight Domains of a Cloud Security Review

Cloud reviews should not be reduced to checking whether storage is public or whether a firewall exists. Modern cloud environments are identity-centered, service-dependent, heavily automated, and built from managed capabilities. A review therefore needs several connected perspectives.

Shared responsibility

Clarify which security responsibilities belong to the fictional cloud provider and which remain with the customer organization.

Review question: Which control outcomes depend on provider capabilities, and which still require Northbridge configuration, ownership, review, or policy?

Identity and access

Review workforce identities, service identities, privileged roles, temporary access, role ownership, and lifecycle decisions.

Review question: Who or what can act, why is the access needed, how much privilege exists, and when should that privilege change or end?

Data protection

Understand where fictional information is stored, how it is classified, who can access it, how it moves, and how its lifecycle is governed.

Review question: Is the data protected according to its sensitivity, purpose, retention, sharing, recovery, and access requirements?

Network and trust boundaries

Review how cloud services communicate, where trust contexts change, and which paths require stronger validation, filtering, segmentation, or ownership.

Review question: Where does identity, data, authority, or responsibility cross a boundary that deserves explicit control?

Logging and monitoring

Confirm that important cloud identity, storage, workload, network, administrative, and service-health events produce enough evidence for defensive decisions.

Review question: Which events must be observable, who owns the telemetry, and what happens when coverage or freshness is reduced?

Resilience and recovery

Review backups, dependencies, recovery ownership, service restoration, and evidence that critical workflows can return to trusted operation.

Review question: Which failures matter most, what must be restored first, and what evidence is needed before declaring recovery complete?

Configuration governance

Keep cloud configuration changes approved, attributable, reviewable, and aligned with policy rather than depending on informal one-time fixes.

Review question: Who owns the control, how is change approved, how is drift detected conceptually, and how are exceptions governed?

Third-party and service dependencies

Identify managed services, identity providers, integrations, and external services whose failure or lifecycle can affect security outcomes.

Review question: What responsibility, evidence, recovery, and exit assumptions exist around each important dependency?

Shared Responsibility

Provider Capability Does Not Replace Customer Governance

Shared responsibility changes with the cloud service model, but the underlying reasoning stays consistent: the provider operates certain platform layers, while the customer still makes important decisions about use, access, data, configuration, monitoring, resilience, and governance.

Physical facilities and core provider infrastructure

Provider side

The fictional cloud provider operates data centers, foundational infrastructure, and underlying platform availability responsibilities defined by its service.

Customer side

Northbridge still decides which cloud services to use, what business data belongs there, and whether the service meets organizational requirements.

Identity configuration

Provider side

The provider supplies identity capabilities, authentication features, logging options, and administrative controls.

Customer side

Northbridge defines roles, grants access, reviews privileges, protects privileged identities, and removes access when the need ends.

Managed storage

Provider side

The provider operates the storage service and platform-level durability capabilities.

Customer side

Northbridge classifies data, configures approved access, defines sharing, chooses retention, reviews exposure, and validates recovery expectations.

Logging

Provider side

The platform may produce administrative, identity, service, or data-access telemetry depending on the service.

Customer side

Northbridge decides which evidence is required, enables appropriate collection through authorized processes, monitors source health, controls access, and reviews retention.

Managed application service

Provider side

The provider maintains parts of the managed runtime according to the service model.

Customer side

Northbridge remains responsible for application logic, identities, data use, permissions, secure design, dependency choices, and operational governance.

Recovery

Provider side

The platform may offer redundancy, snapshots, backups, or regional service options depending on the fictional service.

Customer side

Northbridge defines business recovery goals, owns restoration decisions, tests recovery safely, and verifies that restored service is trustworthy.

Evidence Discipline

Separate What the Architecture Says from What the Evidence Proves

Confirmed architecture fact

A relationship explicitly shown in the fictional design or supplied record.

Example: APP-NB-C1 reads from DATA-NB-C2 through a designated workload identity.

Policy requirement

An organizational rule that the design should satisfy.

Example: Privileged access must have named ownership and recurring review.

Control evidence

A synthetic record showing that a review, approval, log, recovery exercise, or other control activity occurred.

Example: A fictional quarterly access review shows the owner approved three roles and removed one stale grant.

Assumption

A condition believed to be true but not yet supported by enough evidence.

Example: The team assumes all required cloud audit sources meet the expected freshness target.

Exception

A documented, approved deviation from a requirement with owner, rationale, residual risk, and review.

Example: A legacy reporting workload has a temporary monitoring exception until migration completes.

Unknown

A missing fact that affects confidence or prioritization.

Example: The student evidence set does not include proof that every backup has been recently restored in a synthetic exercise.

Fictional Architecture

Northbridge Cloud Environment

The following inventory is intentionally abstract. It contains no real provider names, addresses, account identifiers, credentials, configuration values, or production routes. It is enough to demonstrate cloud architecture and governance reasoning.

CLOUD-NB-01

Portal Application APP-NB-C1

Sensitivity: Moderate

Fictional managed application serving student-facing features.

Trust context

Receives authenticated identity context and communicates with protected data and queue services.

Owner

Application Platform Team

Dependencies

Identity service ID-NB-C3, Data Store DATA-NB-C2, Queue Q-NB-C4, monitoring MON-NB-C8

CLOUD-NB-02

Profile Data Store DATA-NB-C2

Sensitivity: High

Managed storage containing synthetic student preference and profile records.

Trust context

Accepts approved workload and administrative identities only in the fictional design.

Owner

Data Services Team

Dependencies

Workload identity, backup service BAK-NB-C7, access review process

CLOUD-NB-03

Cloud Identity Service ID-NB-C3

Sensitivity: High

Provides workforce, privileged, and workload identity context.

Trust context

Acts as a central dependency for application and administration decisions.

Owner

Identity Governance Team

Dependencies

Role inventory, approval workflow, federation lifecycle, monitoring

CLOUD-NB-04

Processing Queue Q-NB-C4

Sensitivity: Moderate

Supports asynchronous processing between the portal and background worker.

Trust context

Carries synthetic processing context across a service boundary.

Owner

Application Operations

Dependencies

Worker WRK-NB-C5, monitoring, service-health workflow

CLOUD-NB-05

Background Worker WRK-NB-C5

Sensitivity: High

Processes approved queued work using a dedicated workload identity.

Trust context

Can update selected synthetic records through a scoped service role.

Owner

Platform Engineering

Dependencies

Queue, workload identity, data store, deployment governance

CLOUD-NB-06

Admin Workspace ADM-NB-C6

Sensitivity: High

Restricted administrative interface for approved cloud operations.

Trust context

Crosses from normal workforce context into privileged cloud administration.

Owner

Cloud Operations Lead

Dependencies

Privileged identity, approvals, administrative logs, change governance

CLOUD-NB-07

Backup and Recovery Service BAK-NB-C7

Sensitivity: High

Stores synthetic recovery copies and supports restoration exercises.

Trust context

Requires protected administrative access and clear recovery ownership.

Owner

Resilience Team

Dependencies

Data Store, recovery plan, validation record

CLOUD-NB-08

Cloud Monitoring MON-NB-C8

Sensitivity: Moderate

Collects synthetic identity, workload, administrative, service-health, and storage evidence.

Trust context

Provides evidence used by detections, investigations, governance, and recovery review.

Owner

Security Monitoring Team

Dependencies

Source health, retention policy, access governance

Fake Dashboard

Northbridge Cloud Review Board

Synthetic portfolio dashboard summarizing the fictional cloud security review.

Cloud assets

8

Application, data, identity, queue, worker, admin, recovery, and monitoring

Review findings

6

Identity, workload, data, monitoring, recovery, and dependency governance

High priorities

3

Privileged review evidence, monitoring freshness, and recovery validation

Open assumptions

4

Control validation, exception lifecycle, telemetry freshness, and recovery evidence

Fake SOC Alert

Cloud Review Finding Requires Validation Evidence

Source: Northbridge Cloud Governance Queue • Time: Synthetic architecture review

High Severity
The fictional backup service has a named owner and documented purpose, but the student evidence set does not contain a recent completed restoration exercise.
Defensive recommendation: Treat backup existence and recovery readiness as separate claims. Require a safe synthetic restoration record with success criteria, dependency checks, owner sign-off, and post-restore validation.

Fake Log Panel

Synthetic Cloud Review Evidence

training-log-viewer.log
[ID] privileged role inventory includes named owner and strong-authentication requirement
[REVIEW] latest quarterly privileged-review artifact not present in supplied evidence set
[WORKLOAD] WRK-NB-C5 uses dedicated fictional identity with documented current purpose
[DATA] protected storage default prohibits external sharing unless exception is approved
[EXCEPTION] one synthetic sharing exception lacks visible expiration date
[MON] identity, admin, workload, storage, and service-health sources are present
[RECOVERY] backup ownership exists; recent synthetic restoration evidence is not present
[SAFETY] all records are fictional, provider-neutral, and non-operational

Training note: this is fake data for defensive analysis practice only.

Analyze the Evidence

Evidence Analysis 1 — Backup or Recovery?

The fictional backup service exists in the architecture.
A recovery owner is named.
The portfolio contains a recovery plan.
No recent completed synthetic restoration exercise is included in the evidence set.

The architecture shows a managed backup service and a named recovery owner, but no recent synthetic restore result. What is the strongest conclusion?

Review Findings

Six Northbridge Cloud Security Findings

Each finding separates evidence from interpretation and then connects the issue to risk, priority, recommendation, and validation. This makes the project more defensible than a checklist containing only pass/fail labels.

FIND-NB-C401

Privileged cloud role review evidence is incomplete

Identity and Access

Evidence

The fictional role inventory names an owner and shows strong authentication, but the latest quarterly review record is missing from the supplied portfolio evidence.

Interpretation

The design includes the correct governance concept, but current review completion cannot be confirmed from the student evidence set.

Risk

Stale privileged access could persist longer than intended, increasing administrative exposure.

Priority / confidence

High priority · Moderate confidence

Recommendation

Require recurring review evidence, named ownership, temporary-access expiration, and an escalation path for overdue privileged reviews.

Validation evidence

A synthetic completed-review record should show role, owner, disposition, date, and any removed or renewed access.

FIND-NB-C402

Workload identity purpose is defined but change-triggered review is unclear

Workload Identity

Evidence

WRK-NB-C5 uses a dedicated fictional identity with a scoped purpose, but the portfolio does not state when permissions must be reconsidered after workload changes.

Interpretation

Least-privilege intent exists, while lifecycle governance around changing workload scope remains under-specified.

Risk

Permissions could accumulate as the worker gains new responsibilities.

Priority / confidence

Medium priority · High confidence

Recommendation

Define change-triggered review whenever the workload adds data access, service dependencies, or materially different responsibilities.

Validation evidence

A synthetic change review should show old purpose, new purpose, required permissions, owner approval, and resulting disposition.

FIND-NB-C403

Storage-sharing policy is clear but exception expiration needs stronger evidence

Data Protection

Evidence

DATA-NB-C2 is marked protected and external sharing is prohibited by default, but one fictional exception record has an owner and rationale without a visible expiration date.

Interpretation

The exception process exists, but one required governance field is incomplete.

Risk

A temporary exception could continue longer than intended if it lacks a closure or review trigger.

Priority / confidence

Medium priority · High confidence

Recommendation

Require explicit expiration or scheduled review for storage-sharing exceptions and track closure evidence.

Validation evidence

The revised synthetic exception should include owner, rationale, residual risk, compensating controls, expiration, and closure.

FIND-NB-C404

Cloud audit coverage is broad but source-freshness expectations are inconsistent

Logging and Monitoring

Evidence

MON-NB-C8 receives synthetic identity, administrative, workload, storage, and health records, but only some sources have documented freshness expectations.

Interpretation

Coverage appears broad, yet reduced source freshness could weaken detection confidence without being immediately obvious.

Risk

Defenders may make slower or less confident decisions if a key evidence source is delayed.

Priority / confidence

High priority · Moderate confidence

Recommendation

Document required source coverage, freshness expectations, health ownership, dependent detections, and how reduced visibility changes confidence.

Validation evidence

Synthetic source-health records should demonstrate normal, delayed, maintenance, and recovery states.

FIND-NB-C405

Backup ownership exists but restoration evidence is not current

Resilience and Recovery

Evidence

BAK-NB-C7 has a named fictional owner and documented recovery purpose, but the evidence set includes planning records rather than a recent completed restoration exercise.

Interpretation

Backup existence alone does not prove that the organization can restore the service to trusted operation.

Risk

Recovery capability could be overestimated during a disruption.

Priority / confidence

High priority · High confidence

Recommendation

Schedule safe synthetic restoration validation with defined success criteria, owner sign-off, dependency checks, and post-restore integrity review.

Validation evidence

A fictional exercise record should show scope, expected outcome, result, gaps, owner, and follow-up actions.

FIND-NB-C406

Shared identity dependency needs stronger continuity planning

Dependency and Resilience

Evidence

APP-NB-C1, ADM-NB-C6, and several monitoring decisions depend on ID-NB-C3.

Interpretation

The central identity service is intentionally important, but its dependency concentration raises resilience and continuity questions.

Risk

Identity-service disruption could affect both normal user access and administrative recovery workflows.

Priority / confidence

Medium priority · High confidence

Recommendation

Document identity-service dependency, recovery assumptions, emergency governance, and the evidence required before privileged recovery actions proceed.

Validation evidence

A synthetic tabletop record should show how owners communicate, preserve accountability, and restore trusted identity service.

Analyze the Evidence

Evidence Analysis 2 — Shared Responsibility

The fictional provider operates the underlying managed identity platform.
Northbridge defines privileged roles, federation relationships, service identities, and approval workflows.
Northbridge decides when access should be reviewed and removed.
The provider does not know Northbridge's internal business purpose for each role.

Northbridge uses a managed identity service. Which statement best reflects shared responsibility?

Review Questions

Use Questions to Drive Evidence-Based Review

Identity

  • Which workforce, privileged, service, and external identities exist?
  • Who owns each role or trust relationship?
  • How is least privilege reviewed over time?
  • What event should remove or reduce access?

Data

  • What fictional data exists and how sensitive is it?
  • Who can read, change, share, export, or administer it?
  • What retention, recovery, and exception rules apply?
  • What evidence supports the claimed protection?

Network and boundaries

  • Which services communicate and why?
  • Where does trust change?
  • Which paths carry privileged or sensitive context?
  • How is unnecessary connectivity limited conceptually?

Logging

  • Which events are important for defensive review?
  • Which source owns each event?
  • How are health, freshness, and retention governed?
  • What happens to confidence when a source is missing?

Recovery

  • Which service must recover first?
  • Which dependencies must be available?
  • Who owns the recovery decision?
  • What evidence proves service is trustworthy after restoration?

Governance

  • How are cloud changes approved and reviewed?
  • How are exceptions documented and expired?
  • Which findings have risk owners?
  • What future event should trigger re-review?

Prioritization

A Finding Matters Because of Context, Not Because It Is in the Cloud

Cloud findings should be prioritized the same way other professional security findings are: by considering realistic impact, exposure, privilege, dependencies, current controls, evidence confidence, recovery readiness, business importance, and ownership.

Business importance

A finding affecting a critical identity or recovery dependency may deserve more attention than a similar issue in a low-impact reporting service.

Privilege and reach

Administrative and workload identities with broader authority deserve stronger ownership and lifecycle governance.

Dependency concentration

Identity, monitoring, network, storage, or queue services can influence many downstream functions at once.

Control strength

Existing controls lower residual risk only when their relevance and evidence are understood.

Evidence confidence

A confirmed policy gap should not be written the same way as an assumption based on incomplete evidence.

Recovery readiness

A service with strong prevention but weak recovery evidence may still deserve high resilience priority.

Common Mistakes

Avoid These Cloud Review Anti-Patterns

Assuming the provider secures everything

Cloud providers operate important platform controls, but customers still own major decisions about identity, data, configuration, workload design, logging, recovery, and governance.

Treating a diagram as proof of implementation

A diagram shows design intent. Keep control evidence separate from what the architecture says should exist.

Reviewing only network exposure

Modern cloud security also depends heavily on identity, workload permissions, data access, logging, service relationships, recovery, and lifecycle governance.

Ignoring managed-service dependencies

Managed services reduce some operational work but can become critical dependencies. Ownership, recovery, evidence, and exit assumptions still matter.

Calling every gap critical

Prioritize using business impact, exposure, privilege, dependencies, current controls, uncertainty, and residual risk.

Testing a real cloud account for a portfolio

Student portfolio work should stay synthetic and provider-neutral. Architecture review and fictional evidence are enough to demonstrate advanced reasoning.

Safe Fictional Lab

Build the Northbridge Cloud Security Review

Use only the supplied architecture, findings, policy requirements, and synthetic records. The exercise is a documentation review, not a live cloud assessment.

Task 1 — Responsibility map

Choose four cloud capabilities and explain the fictional provider responsibility, Northbridge responsibility, and evidence needed to review the customer side.

Task 2 — Identity review

Review privileged and workload identities. Identify purpose, owner, lifecycle trigger, evidence gap, and one improvement.

Task 3 — Data review

Describe the protected storage asset, approved access, sharing rule, exception process, retention or recovery need, and one governance concern.

Task 4 — Visibility review

List the important synthetic telemetry sources, explain what each supports, and identify how a missing source would change confidence.

Task 5 — Recovery review

Explain why backup evidence differs from restoration evidence and define what a successful synthetic recovery record should contain.

Task 6 — Executive summary

Write one short paragraph naming the top three findings, overall review confidence, and the most important owner decisions.

Scenario Decision Lab

Scenario Decision 1 — Missing Privileged Review Record

The fictional cloud role inventory is well documented, but the latest recurring privileged-access review cannot be found in the supplied portfolio evidence.

Scenario Decision Lab

Scenario Decision 2 — Temporary Storage Exception

A fictional storage-sharing exception has an approved owner and rationale but no expiration or scheduled review date.

Advanced Challenge

Defend the Cloud Review to Three Audiences

Cloud Architect

Explain trust boundaries, workload identities, data flows, dependencies, shared responsibility, and which design assumptions need validation.

Risk Owner

Explain top findings in terms of business impact, residual risk, ownership, recovery, and the decisions required next.

Portfolio Reviewer

Explain how the artifact demonstrates provider-neutral knowledge, evidence discipline, governance, prioritization, safe recommendations, and professional communication.

Defender Habits

Cloud Security Review Project Checklist

Assessment

A19.8 Knowledge Check

Check Your Understanding

A19.8 Mini Quiz: Cloud Security Review Project

Choose your answers first. Explanations appear only after submission.

1. What does shared responsibility mean in cloud security?

2. Why should a cloud review distinguish architecture facts from control evidence?

3. Which finding best represents a workload-identity lifecycle concern?

4. Why is backup existence alone insufficient evidence of recovery readiness?

5. What should defenders do when cloud telemetry freshness is uncertain?

6. Which recommendation is strongest for a temporary cloud-security exception?

7. What is safest for a student Cloud Security Review Project?

Portfolio Prompt

Portfolio Prompt — Cloud Security Review Project

Create a professional fictional Northbridge Cloud Security Review. Include scope, shared-responsibility summary, cloud asset inventory, identity review, data-protection review, trust-boundary review, logging and monitoring review, resilience and recovery review, configuration-governance review, six findings with evidence and confidence, top-three priorities, owner-based recommendations, validation evidence, one governed exception example, an executive summary, and a publication-safety statement.

Keep the project provider-neutral so the reasoning remains useful across cloud platforms.
Separate design facts from proof that a control was reviewed or functioning.
Include both human and workload identity governance.
Treat telemetry source health and recovery validation as important dependencies.
Use findings that connect evidence, interpretation, risk, recommendation, ownership, and validation.
Use only fictional architecture and synthetic evidence; never connect to or inspect real cloud accounts.

Confidence / Readiness Reflection

Are You Ready for A19.9?

A19.9 moves into Portfolio Reflection and Presentation. Before continuing, make sure you can explain not only what your cloud review found, but also what the artifact demonstrates about your reasoning, communication, ethical boundaries, revision process, and growth across the entire portfolio module.

1

I can explain shared responsibility without oversimplifying provider and customer duties.

2

I can review cloud identity, data, logging, recovery, and governance using fictional evidence.

3

I can separate architecture intent from control-validation evidence.

4

I can write a bounded cloud finding with evidence, risk, priority, recommendation, owner, and validation.

5

I can explain why a student cloud portfolio should remain provider-neutral, fictional, and non-operational.

Portfolio Build Guide

Make the Cloud Review Easy to Understand and Safe to Share

Open with scope and responsibility

Tell the reader what the fictional environment contains and how provider and customer responsibilities are divided conceptually.

Use an asset inventory

Stable fictional IDs make architecture, findings, risks, and recommendations easy to connect without repeating long descriptions.

Separate evidence and interpretation

Show what the synthetic record says before explaining what you think it means.

Group findings by domain

Identity, data, monitoring, resilience, governance, and dependency sections help reviewers understand the breadth of the review.

Rank only material findings

A portfolio looks stronger when priorities are justified rather than when every minor observation is labeled High.

Show validation evidence

For each major recommendation, state what fictional record or review would demonstrate that the improvement is complete.

Summarize for leadership

Finish with top risks, overall confidence, owner decisions, and the next review milestone rather than repeating every technical detail.

Remove real cloud details

Do not include production screenshots, account IDs, resource names, credentials, secret values, internal routes, or unresolved real findings.

Key Takeaways

What You Should Remember

1.Cloud security is a shared-responsibility problem: provider capabilities and customer governance must be understood together.
2.Identity, data, trust boundaries, logging, recovery, configuration governance, and dependencies all belong in a mature cloud review.
3.Architecture diagrams describe intended design, while evidence is needed to support claims about control operation or review.
4.Workload identities need purpose, least privilege, ownership, and lifecycle review just like human identities.
5.Cloud logging quality depends on coverage, freshness, ownership, retention, and knowledge of what each source can prove.
6.Backups are not the same as recovery readiness; restoration and validation evidence matter.
7.Findings should distinguish fact, interpretation, risk, uncertainty, recommendation, ownership, and validation evidence.
8.A student cloud portfolio should remain provider-neutral, fictional, synthetic, publication-safe, and completely non-operational.

Lesson Safety Boundary

Cloud review in this lesson is fictional, provider-neutral, and non-operational

Do not sign in to, scan, probe, enumerate, exploit, test, configure, modify, or investigate any real cloud account, identity, storage service, network, workload, monitoring system, or backup environment. Do not publish real account identifiers, credentials, secret values, production diagrams, access policies, logs, private records, internal routes, or unresolved security findings. Use only the synthetic Northbridge evidence supplied in the lesson.

Lesson Complete

A19.8 Cloud Security Review Project Complete

You now have a portfolio-ready structure for reviewing cloud security across shared responsibility, identity, data, logging, resilience, and governance. Next, A19.9 focuses on reflecting on your portfolio work and presenting it clearly to different audiences.