Device Identification and Authentication extends the identity requirement from people to machines. User Identification, Authentication, and Re-Authentication (03.05.01) confirms who a user is, and Device Identification and Authentication (03.05.02) confirms what a device is before it is allowed to connect. It is a single statement: uniquely identify and authenticate a defined set of devices or types of devices before establishing a system connection. Per the NIST discussion, systems can use shared known information such as network addresses for device identification, or authentication solutions such as certificate-based methods, and Public Key Infrastructure (PKI) with certificate revocation checking can be part of device authentication.
A common difficulty with this requirement is treating device authentication as optional or informal. The requirement is driven by an Organization-Defined Parameter (ODP) that names which devices or device types must be identified and authenticated, and for Department of Defense (DoD) contractors that scope is broad. Simply allowing any device that reaches the network, or relying on a shared network password, does not meet the objective of uniquely identifying and authenticating a device before it connects.
Where things stand for companies facing the transition from NIST 800-171 R2 to R3:
The following is reproduced verbatim from NIST 800-171 R3, requirement 03.05.02 Device Identification and Authentication. Only the formatting has been adjusted for readability. This is a single statement with no lettered parts:
The source control is IA-03 from NIST 800-53. The bracketed assignment is the Organization-Defined Parameter (ODP): the devices or types of devices to identify and authenticate. Per the NIST discussion, devices requiring unique device-to-device identification and authentication are defined by type, device, or a combination, and organization-defined device types can include devices not owned by the organization. You can read the requirement directly at NIST 800-171 R3, 03.05.02 (p. 34).
One (1) value sits inside this requirement. Depending on your contract, your organization may be permitted to define it. Organizations in the DIB subject to CMMC are not, because the DoD has defined it as policy.
The value below comes from Attachment A of the DoD Chief Information Officer (CIO) memorandum dated 10 April 2025 (signed David W. McKeown). The memo identifies each parameter by requirement sub-part, while NIST 800-171A R3 identifies the same parameter by ODP number. Both identifiers appear below so you can match your System Security Plan (SSP) language to either document.
The memo states that its values "will be updated as necessary," so confirm against the current version before writing them into policy.
NIST 800-171A R3 breaks 03.05.02 into three (3) assessment objectives: one (1) Organization-Defined Parameter (ODP) and two (2) determination statements. These AOs are:
Identification and authentication are separate objectives, so identifying a device without authenticating it leaves an objective open. If you are a DoD contractor, the ODP is specified and broad. Per the DoD-specified ODP value in ComplianceForge's NIST 800-171 R3 Transition Guide, the scope is all devices for identification and, where feasible, for authentication, with documentation when authentication is not feasible. The full guidance on assessment methods and objects, is in NIST 800-171A R3, 03.05.02 (p. 43).
Examine: identification and authentication policy and procedures; procedures for device identification and authentication; system design documentation; list of devices requiring unique identification and authentication; device connection reports; system configuration settings; system security plan.
Interview: personnel with responsibilities for device identification and authentication; personnel with information security responsibilities; system developers; system administrators.
Test: mechanisms for supporting or implementing device identification and authentication capabilities.
03.05.02 maps from NIST 800-171 R2 requirement 3.5.2 (authenticate the identities of users, processes, or devices as a prerequisite to allowing access to organizational systems):
Mapped against the three (3) AOs, one (1) is direct (minimal effort) and two (2) have no clear mapping (significant effort), with none indirect and none net new. Device authentication itself carries forward from R2 3.5.2, but R3 adds an explicit device-scope parameter and a distinct unique-identification objective that do not trace cleanly to a R2 objective. Define the device scope deliberately rather than assuming your R2 device authentication covers it.
Source Control in NIST 800-53 R5:
Secure Controls Framework (SCF) Crosswalk
Organizations running a single control set across multiple frameworks can satisfy 03.05.02 through the following SCF controls:
The crosswalks from NIST 800-171 R3 and NIST 800-171A R3 to the SCF are available at no cost through the SCF Set Theory Relationship Mapping (STRM): https://securecontrolsframework.com/start-here/set-theory-relationship-mapping-strm. The STRM also carries the relationship type for each mapping (Equal, Subset Of, Intersects With), which tells you whether an SCF control fully satisfies the requirement or only part of it. Mapping above taken from SCF 2026.3.
The following are issues teams may encounter rather than certainties. They are about scope and the identify-then-authenticate split, each of which needs documented evidence of due diligence and due care such as policies, standards, procedures, and configuration screenshots:
Reasonable objective evidence for an assessment is often subjective. The following examples of evidence to address NIST 800-171 R3 03.05.02 are sourced from the SCF Evidence Request List (ERL), available at https://securecontrolsframework.com/free-content/scf-download. These ERL artifacts are mapped to NIST 800-171 R3 03.05.02 through SCF controls. They establish a starting point for discussions on what an organization needs to have for evidence of due diligence and due care to withstand external scrutiny by an assessor or regulator.
Alongside these, keep the System Security Plan (SSP) narrative for 03.05.02 recording the ODP values you adopted.
With one AO mapping directly and two having no clear mapping, 03.05.02 is a moderate lift concentrated on scoping and unique identification. A realistic sequence:
What value does the DoD require for the organization-defined parameter in NIST 800-171 R3 03.05.02? R3 leaves the value to the organization. For the DIB, the DoD set it in the 10 April 2025 memorandum under ODP identifier 03.05.02: all devices for identification, where feasible for authentication, and document when not feasible.
How many assessment objectives does NIST 800-171 R3 03.05.02 have? NIST 800-171A R3 breaks 03.05.02 into three (3) assessment objectives: one (1) Organization-Defined Parameters (ODPs) and two (2) determination statements. An assessor works through each one separately, so each needs its own evidence.
Which NIST 800-53 R5 control does NIST 800-171 R3 03.05.02 come from? IA-03.
Where does NIST 800-171 R3 03.05.02 sit in the NIST 800-171 R3 Kill Chain? Phase 13, Identity & Access Management (IAM). The Kill Chain is a phased model for sequencing R3 implementation, and it assigns this requirement to that phase.
03.05.02 Device Identification and Authentication uniquely identifies and authenticates a defined set of devices before they connect. It maps from R2 3.5.2 with device authentication transitioning directly, while the device-scope parameter and the unique-identification objective have no clear R2 mapping. The recurring problem is allowing any device onto the network or relying on a shared secret. Define the device scope (for DoD, all devices), identify and authenticate each before connection, and document where authentication is not feasible.
Authoritative sources:
Authoritative sources:
This guide reproduces U.S. Government text from NIST 800-171 R3 and NIST 800-171A R3 and references the DoD ODP memorandum of 10 April 2025. It is educational, not legal or assessment advice. Last reviewed: 2026-09-22.
