Category: Cloud Security & Providers

Cloud Service Offering

Also known as:

Simply put

A Cloud Service Offering (CSO) is a specific cloud product or service that a cloud service provider makes available to government customers. In the federal and defense context, a CSO is the unit that goes through security authorization so that agencies can use it. Its ability to serve agency customers depends on maintaining that authorization and meeting ongoing security requirements.

Formal definition

A Cloud Service Offering (CSO) is the discrete cloud product or service delivered by a Cloud Service Provider (CSP) that is the subject of security assessment and authorization for government use. In the FedRAMP context, a CSO is authorized against a specified baseline and, per FedRAMP guidance, is subject to continuous monitoring obligations such as submitting monthly ConMon deliverables and conducting annual assessments; the loss of all agency customers does not by itself terminate these obligations for a CSO seeking to retain its authorization. In the DoD context, CSOs are sponsored by DoD components and processed through DoD Cloud Authorization Services (DCAS), and are categorized by Impact Level (for example IL2, IL4 for Controlled Unclassified Information or non-critical mission information, and higher levels such as IL6 for classified offerings). Note that FedRAMP authorization and DoD Impact Level authorization are distinct processes governed by different authorities; a FedRAMP-authorized CSO does not automatically satisfy DoD Impact Level requirements. Readers should verify current baselines, Impact Level definitions, and authorization requirements against the applicable FedRAMP and DoD Cloud Computing Security Requirements Guide documents, as these evolve across revisions.

Why it matters

The Cloud Service Offering is the actual unit of authorization in federal and defense cloud procurement, which makes it the practical hinge on which an agency's ability to lawfully use a cloud product turns. When a compliance officer or authorizing official evaluates whether an agency may adopt a cloud capability, they are ultimately assessing a specific CSO and its authorization status, not the cloud provider as a whole. A single Cloud Service Provider may offer multiple CSOs at different authorization levels, so treating a provider as uniformly "authorized" is a common and consequential error.

Authorization is not a permanent state. Per FedRAMP guidance, a CSO carries ongoing obligations even when circumstances change; for example, a CSO that loses all of its agency customers is still expected to submit monthly continuous monitoring (ConMon) deliverables and conduct an annual assessment if it seeks to retain its authorization. This underscores a point experts routinely stress: authorization is time-bound and dependent on sustained security activity, and compliance should never be conflated with a one-time approval. Readers should verify current continuous monitoring requirements against the applicable FedRAMP documentation.

A further critical distinction is that FedRAMP authorization and DoD Impact Level authorization are separate processes governed by different authorities. A FedRAMP-authorized CSO does not automatically satisfy DoD Impact Level requirements, which are processed through DoD Cloud Authorization Services (DCAS) and categorized by Impact Level. Assuming that a civilian FedRAMP authorization carries over to defense use is a mistake that can expose an organization to compliance gaps, particularly where Controlled Unclassified Information or classified mission information is involved.

Who it's relevant to

Authorizing Officials and ISSMs

Authorizing officials and information system security managers evaluate whether a specific CSO's authorization status and Impact Level match the sensitivity of the information their systems will process. They must confirm that a given CSO holds the appropriate authorization for the intended use case and should not assume that authorization at one level or under one framework satisfies requirements at another. They also carry responsibility for confirming that continuous monitoring obligations tied to the CSO remain current.

Cloud Service Providers

CSPs offering products to government customers must understand that each CSO is authorized individually and carries ongoing obligations. A CSO seeking to retain its FedRAMP authorization is generally expected to continue submitting monthly ConMon deliverables and to conduct an annual assessment, even if it loses its agency customers. Providers targeting DoD use must separately pursue Impact Level authorization through DoD Cloud Authorization Services, as FedRAMP authorization alone does not satisfy DoD requirements.

DoD Component Sponsors

DoD components that intend to sponsor a Cloud Service Offering engage with DoD Cloud Authorization Services (DCAS) to initiate the authorization process. Sponsors need to identify the appropriate Impact Level for the mission information involved, for example IL4 for Controlled Unclassified Information or higher levels for classified offerings, and should verify current Impact Level definitions against the applicable DoD Cloud Computing Security Requirements Guide.

Compliance Officers and Auditors

Compliance officers and auditors assessing cloud usage should verify the authorization status of the specific CSO in question rather than relying on a provider-level assumption. Because a single provider may offer multiple CSOs at differing authorization levels and frameworks, and because authorization is contingent on sustained continuous monitoring, auditors should confirm that authorization is both current and appropriate to the data and mission context.

Inside CSO

Service Offering Boundary

The defined set of cloud resources, services, and components that a Cloud Service Provider (CSP) makes available to customers and that is described in the authorization package. The boundary determines what is covered by any assessment or authorization, and elements outside the defined boundary are generally not included in that scope.

Service Model

The delivery model under which the offering is provided, such as Infrastructure as a Service, Platform as a Service, or Software as a Service. The service model affects how responsibilities are divided between the CSP and the customer and should be confirmed against the offering's documentation.

Deployment Characteristics

The manner in which the offering is deployed and made available (for example, public, private, community, or hybrid arrangements). Deployment characteristics can influence applicable control tailoring and the impact level at which the offering may be assessed or authorized.

Shared Responsibility Allocation

The documented division of security and control responsibilities between the CSP and the consuming organization. In most implementations, the CSP is responsible for certain controls, the customer for others, and some are shared or inherited, which the customer must confirm for its specific use.

Authorization Context

The relationship between the offering and any authorization it holds, such as a FedRAMP authorization at a given impact level issued through the FedRAMP process. The specific impact level, status, and scope should be verified against current authoritative sources rather than assumed.

Common questions

Answers to the questions practitioners most commonly ask about CSO.

Does a FedRAMP authorization for a Cloud Service Offering automatically satisfy DoD requirements?

No. A FedRAMP authorization and a DoD authorization are distinct. FedRAMP, managed by the FedRAMP Program Management Office, addresses federal civilian agency use of cloud services, while DoD components generally apply additional requirements, such as those in the DoD Cloud Computing Security Requirements Guide (SRG), layered on top of a FedRAMP baseline. A CSO authorized at a given FedRAMP impact level does not by itself meet DoD-specific impact level requirements. Readers should verify current DoD authorization criteria against the applicable DoD SRG and component guidance, because these requirements are subject to revision and agency tailoring.

Is an authorization for a Cloud Service Offering permanent once granted?

No. An authorization for a CSO, like any Authority to Operate, is time-bound and conditioned on continuous monitoring rather than being a one-time or permanent status. The authorizing official's decision reflects the risk posture at a point in time, and the CSO remains subject to ongoing monitoring, reporting, and periodic reassessment. Changes to the offering, its boundary, or the threat environment can affect the authorization. Confirm current continuous monitoring and reauthorization expectations against the governing program's official requirements.

How should the authorization boundary for a Cloud Service Offering be defined?

The authorization boundary generally identifies the components, services, and interconnections of the CSO that are covered by the assessment and authorization, distinguishing what the provider is responsible for from what falls to the customer or external services. Because scoping decisions directly affect which controls apply and how they are assessed, boundary definitions should be documented clearly and confirmed against the applicable program's guidance and the current authoritative text, which may be tailored by the responsible agency or program office.

How do impact levels affect the assessment of a Cloud Service Offering?

Impact levels generally influence the applicable control baseline and the rigor of assessment expected for a CSO, with higher impact levels typically corresponding to more extensive requirements. Federal civilian and DoD contexts use their own impact level constructs, and a level established under one program does not automatically translate to another. Verify the specific baseline, tailoring, and assessment expectations for the relevant impact level against the current governing publication, as these are subject to revision.

What role does a shared responsibility model play in implementing a Cloud Service Offering?

A shared responsibility model generally documents which security controls or portions of controls are the responsibility of the cloud service provider versus the customer organization. Because responsibilities can vary by service model and offering, customers should not assume a control is fully satisfied by the provider without confirming it in the CSO's documentation. Clarifying and documenting these responsibilities is typically necessary to support the customer's own assessment and authorization efforts, and specifics should be confirmed against the provider's authorization package and current program guidance.

What is the difference between assessing and authorizing a Cloud Service Offering?

Assessment and authorization are distinct activities. Assessment involves evaluating whether the CSO's controls are implemented and operating as intended, typically producing findings and supporting evidence. Authorization is a separate risk-based decision made by an authorizing official to accept the residual risk and permit operation for a defined period. A completed assessment does not itself constitute an authorization. Confirm the specific roles, deliverables, and decision authorities against the current governing program's official requirements, which may differ across federal civilian and DoD contexts.

Common misconceptions

A FedRAMP-authorized Cloud Service Offering automatically satisfies DoD requirements for handling defense information.

FedRAMP authorization and DoD authorization are distinct. A FedRAMP authorization does not automatically meet DoD-specific requirements, which may impose additional conditions under the DoD RMF and related DoD Cloud requirements. Readers should confirm DoD-specific applicability against current DoD guidance.

Using an authorized Cloud Service Offering makes the customer compliant.

An offering's authorization applies to the CSP-managed portion within the defined boundary. Under the shared responsibility model, the customer generally remains accountable for customer-responsible controls and for how it configures and uses the service. Compliance of the offering does not equate to compliance of the customer's overall system, nor does it equate to being secure.

The authorization or assessment of a Cloud Service Offering is a one-time, permanent event.

Authorizations are generally time-bound and subject to continuous monitoring. Assessment and authorization are also distinct activities, an assessment evaluates controls, while authorization is a risk-based acceptance decision. Both may change across revisions, and the current status should be verified.

Best practices

Obtain and review the offering's defined service boundary so you understand exactly which components and services are covered and which fall outside the authorization scope.

Confirm the shared responsibility allocation for your service model and document which controls are CSP-provided, customer-responsible, or shared before relying on any inherited controls.

Verify the offering's current authorization status, impact level, and scope against authoritative sources rather than assuming it remains valid, since authorizations are time-bound and subject to continuous monitoring.

Do not assume a FedRAMP authorization satisfies DoD requirements; separately confirm applicability against current DoD guidance when the offering will handle defense information or support DoD systems.

Distinguish the offering's authorization from your own system's compliance obligations, and assess how your configuration and use of the service affects your responsibilities.

Re-verify controls, impact levels, and authorization details as applicable revisions and agency tailoring change over time, and consult current official publications for specifics.