808bits

Kernel Mode Cryptographic Primitives Library

FIPS 140-2 certificate #4670 · Microsoft Corporation · data as of 2026-08-28
Active. Sunset date 2026-09-21, 23 days away. This is the FIPS 140-2 sunset: after it, agencies may keep the module only in existing systems.
Caveat: When operated in FIPS mode with module Windows OS Loader validated to FIPS 140-2 under Cert. #4545 operating in FIPS mode

Certificate

Certificate number4670
StandardFIPS 140-2
Statusactive
Sunset date2026-09-21
Overall level1
Module typeSoftware-Hybrid
EmbodimentMulti-Chip Stand Alone
VendorMicrosoft Corporation · website
Software versions10.0.17763.10021 and 10.0.17763.10127
Hardware versionsIntel Xeon Silver 4114, Intel Xeon Gold 6230, Intel Xeon Platinum 8260 and Intel Xeon D-1559

Module description

Kernel Mode Cryptographic Primitives Library (cng.sys) runs as a kernel mode export driver, and provides cryptographic services, through their documented interfaces, to Windows kernel components. It supports several cryptographic algorithms accessible via a FIPS function table request IRP (I/O request packet).

Security level exceptions

  • Design Assurance: Level 2

Approved algorithms

AlgorithmCAVP certificate
AESC1577, C1584, C2044, C2050
CKGvendor affirmed
CVLC1577, C2044
DRBGC1577, C2044
DSAC1577, C2044
ECDSAC1577, C2044
HMACC1577, C2044
KASC1577, C2044
KBKDFC1584, C2050
KTS
PBKDFvendor affirmed
RSAC1577, C1586, C2044, C2052
SHSC1577, C2044
Triple-DESC1577, C2044

Allowed algorithms

EC Diffie-Hellman (key agreement; key establishment methodology provides between 112 and 256-bits of encryption strength); NDRNG

Tested configurations

  • Windows Server 2019 Datacenter Core (x64) running on a Dell PowerEdge R640 Server with an Intel Xeon Gold 6230 with PAA
  • Windows Server 2019 Datacenter Core (x64) running on a Dell PowerEdge R840 Server with an Intel Xeon Platinum 8260 with PAA
  • Windows Server 2019 Datacenter Core (x64) running on a Dell XR2 with an Intel Xeon Silver 4114 with PAA
  • Windows Server 2019 Datacenter Core (x64) running on a Rugged Mobile Appliance with an Intel Xeon D-1559 with PAA (single-user mode)

Validation history

DateTypeLab
2023-12-12InitialLeidos Accredited Testing & Evaluation (AT&E) Lab

Status timeline

As observed by this tracker's snapshots. NIST publishes no dates for list moves; observation began 2026-08-21, so earlier changes carry no date.

  • 2026-08-21: first observed by this tracker, status active
  • Validation dates on record: 2023-12-12

Source documents