FedRAMP Moderate authorization is the minimum authorization baseline for cloud services that process, store, or transmit federal contractor data at a moderate impact level — systems where the confidentiality, integrity, or availability of the data could cause serious adverse effects if compromised. For SaaS vendors building identity and access management products for the federal contractor market, FedRAMP Moderate is typically the target baseline, and the authentication controls within the IA control family are among the most evidence-intensive to demonstrate compliance with during the assessment process.
This guide focuses on IA-2, IA-5, and IA-8 — the three authentication controls that FedRAMP assessors (3PAOs) spend the most time evaluating for identity-centric SaaS products. It describes what each control requires at the Moderate baseline, what evidence assessors request, and where the most common documentation and implementation gaps appear.
IA-2: Identification and Authentication for Organizational Users
IA-2 (Identification and Authentication — Organizational Users) at the FedRAMP Moderate baseline requires unique identification and multi-factor authentication for all organizational users — meaning all users who are employees or contractors of the cloud service provider. "Unique" is the critical qualifier: shared accounts, group accounts, and service accounts used by human operators fail IA-2 at any impact level.
The Moderate baseline requires the following IA-2 enhancements:
- IA-2(1): Privileged Accounts. MFA for all privileged user accounts. At FedRAMP Moderate, this means production system administrators, security operations personnel, and any user with elevated access rights must use multi-factor authentication. The factor combination must meet NIST SP 800-63B Level 2 Authenticator Assurance (AAL2) requirements: a possession factor (hardware token, authenticator app, or PIV) combined with a knowledge or inherent factor.
- IA-2(2): Non-Privileged Accounts. MFA for all non-privileged accounts accessing organizational systems. Combined with IA-2(1), this means universal MFA enforcement for all internal users — not just administrators.
- IA-2(8): Network Access to Privileged Accounts — Replay Resistant. Requires that authentication mechanisms for privileged network access be replay-resistant — meaning session tokens or authentication assertions cannot be captured and replayed. OTP-based TOTP apps satisfy this requirement; static passwords alone do not.
- IA-2(12): Acceptance of PIV Credentials. Requires that the system accept PIV credentials issued by federal agencies for system access. For SaaS products serving federal agency environments directly, this is operationally required. For products serving the federal contractor market (where users hold CAC/PIV but the system is procured by a contractor, not directly by an agency), the implementation path typically involves configuring the identity provider to accept PIV-derived certificates through FICAM-approved federation.
What assessors examine beyond configuration screenshots: the account lifecycle. IA-2 is satisfied by technical enforcement only if the underlying account management process ensures that all active accounts belong to uniquely identified individuals. Assessors will request a current user account list, sample accounts for verification of MFA enrollment, and evidence of periodic access reviews (under AC-2) that demonstrate dormant or unauthorized accounts are identified and removed.
IA-5: Authenticator Management — The Most Documentation-Intensive Control
IA-5 governs the full lifecycle of every authenticator the system uses — passwords, hardware tokens, software OTP seeds, PKI certificates, and biometric templates. The base control and applicable Moderate baseline enhancements create a substantial documentation burden that many SaaS vendors underestimate during FedRAMP preparation.
The base IA-5 control requires: verifying user identity before distributing authenticators, establishing authenticator content meeting organizational strength requirements, implementing administrative procedures for compromised authenticators, requiring immediate change on first use for distributed authenticators, setting minimum and maximum authenticator lifetime, prohibiting authenticator reuse within a specified generation count, and changing or refreshing authenticators based on risk or upon indication of compromise.
At the Moderate baseline, the applicable enhancements add:
- IA-5(1): Password-Based Authentication. Minimum password length of 8 characters (with support for up to 64), no complexity rules required per updated NIST SP 800-63B guidance, prohibition on passwords found in commonly-used password lists, and cryptographic protection of passwords in storage using approved algorithms. Assessors typically request database configuration documentation or security architecture documentation showing that passwords are hashed with bcrypt, Argon2, or PBKDF2 — not MD5 or SHA-1, which are insufficient for password storage even if FIPS-approved for other uses. They also commonly request evidence of the deny-list mechanism implementation.
- IA-5(2): PKI-Based Authentication. For systems that use PKI certificates (including PIV/CAC acceptance), requires validation of PKI-certificate binding, path validation, OCSP or CRL status checking, and verification that the private key is protected appropriately. Assessors request the PKI trust anchor configuration, evidence of OCSP or CRL integration in the authentication flow, and documentation of key escrow or private key protection mechanisms for any system-issued certificates.
- IA-5(6): Protection of Authenticators. Requires protecting authenticators commensurate with the classification of information that the authenticator accesses. For privileged account tokens accessing system configuration or security-sensitive data, this typically means hardware-backed storage — an HSM or secure enclave — rather than software-only credential storage.
A scenario that illustrates the IA-5(1) evidence gap: a govtech SaaS vendor that processed contractor background check initiation data prepared for their FedRAMP Moderate assessment with strong technical implementations — bcrypt with cost factor 12 for password storage, a known-compromised password deny-list implemented at registration and change events. The assessment finding came from the policy documentation side: the System Security Plan's description of IA-5(1) implementation did not specify the bcrypt cost factor or the deny-list update cadence. Assessors could not verify the adequacy of the implementation from the SSP alone and required supplemental evidence — system configuration exports and the deny-list update process documentation. The fix was documentation, not engineering, but it delayed the authorization decision by six weeks.
We are not suggesting that documentation completeness matters more than technical implementation quality — sound cryptographic implementation with incomplete documentation is preferable to excellent documentation covering weak implementation. The point is that at FedRAMP, evidence adequacy is a distinct requirement from control adequacy, and insufficient SSP specificity generates findings that are indistinguishable from control deficiencies during the assessment process.
IA-8: Non-Organizational Users — The Most Commonly Under-Scoped Control
IA-8 (Identification and Authentication — Non-Organizational Users) is one of the most commonly under-scoped controls in FedRAMP Moderate assessments for SaaS vendors. Non-organizational users are individuals who are not employees or direct contractors of the cloud service provider — which, for identity verification SaaS products serving the federal contractor market, describes virtually every user of the product. Contractor HR personnel, FSOs, cleared employees going through the verification workflow, and agency POCs who access the system are all non-organizational users under IA-8.
The Moderate baseline IA-8 enhancements include:
- IA-8(1): Acceptance of PIV Credentials from Other Agencies. Requires that the system accept PIV credentials issued by other federal agencies. For a govtech product used by federal agency program managers or government oversight personnel, this is typically operationally required.
- IA-8(2): Acceptance of Third-Party Credentials. Requires use of only FICAM-approved credentials for non-organizational users accessing federal systems. The GSA-managed FICAM approved products list identifies credential providers and authentication protocols that meet federal identity standards.
- IA-8(4): Use of FICAM-Issued Profiles. Requires that the authentication mechanism for non-organizational users follow FICAM-published profiles for secure credential management.
The practical implementation for most govtech SaaS vendors: configure the identity provider to accept SAML 2.0 or OIDC assertions from FICAM-approved identity providers, including Login.gov (which provides IAL1 and IAL2 identity proofing for federal interactions) and agency-operated federated identity systems. The federation configuration must be documented in the SSP with the identity providers accepted, the assertion validation requirements, and the session management configuration.
For SaaS vendors supporting federal contractor end users (rather than directly supporting agency users), the IA-8 requirements may be scoped differently based on the ATO's authorization scope — but this scope determination must be explicitly documented in the SSP and approved by the authorizing official, not assumed. For more on how the boundary determination affects IA control scoping, see our article on defining the FedRAMP authorization boundary.
Assessment Evidence Package: What 3PAOs Request for IA-2, IA-5, and IA-8
Understanding what a 3PAO will request during assessment preparation is essential for efficient evidence assembly. The evidence categories for each control are consistent across 3PAOs because they follow the NIST SP 800-53A assessment procedures:
For IA-2: Current user account list with account type (privileged/non-privileged), MFA enrollment confirmation for each account (typically IdP admin export), system configuration screenshots showing MFA enforcement policy, access review records from the prior review cycle, and the Identity and Authentication Policy document.
For IA-5: Password policy configuration screenshots, evidence of bcrypt/Argon2/PBKDF2 password storage (SSP narrative plus schema documentation or security architecture diagram), deny-list implementation evidence (configuration plus update procedure), PKI validation configuration for IA-5(2) if applicable, and authenticator lifecycle procedure documentation.
For IA-8: IdP federation configuration showing accepted credential providers, FICAM-compliant credential acceptance documentation, assertion validation configuration, and evidence of PIV/CAC acceptance capability if IA-8(1) applies to the authorization scope.
Vendors pursuing FedRAMP Moderate authorization should treat SSP Section 13 (IA control family implementation statements) as the primary artifact that all other evidence supports. Each control implementation statement should be specific enough that an assessor can derive a clear understanding of the implementation without additional context — system names, configuration parameter values, and process step specificity all matter. Generic statements ("MFA is enforced for all users") without implementation specifics generate additional evidence requests that lengthen the assessment timeline.
For organizations evaluating identity verification SaaS vendors for federal contractor programs, the critical due diligence question on authentication controls is not whether the vendor supports MFA — virtually all do — but whether their FedRAMP Moderate authorization package includes current evidence of IA-2, IA-5, and IA-8 implementation adequacy, with a POA&M free of open items in those controls. For the broader compliance framework context, our compliance mapping overview describes how identity verification products designed for the federal contractor market align with the full IA control family at the Moderate baseline. For CMMC 2.0-specific authentication requirements in the defense contractor context, see our article on CMMC 2.0 identity requirements for defense contractors.