808bits

Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys)

FIPS 140-2 certificate #1328 · Microsoft Corporation · data as of 2026-10-21

Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys), from Microsoft Corporation, holds FIPS 140-2 certificate #1328 at overall level 1. The validation is historical: agencies may keep the module in existing systems but not buy it new. Below are its validation history, algorithm certificates and security policy, drawn from the NIST CMVP entry.

Historical. RNG SP800-131A Revision 1 Transition. Federal agencies may reference historical validations for existing systems only, not for new procurement.
Caveat: When operated in FIPS mode with Windows 7 Winload OS Loader (winload.exe) validated to FIPS 140-2 under Cert. #1326 operating in FIPS mode

Certificate

Certificate number1328
StandardFIPS 140-2
Statushistorical
Overall level1
Module typeSoftware
EmbodimentMulti-chip standalone
VendorMicrosoft Corporation · website
Software versions6.1.7600.16385, 6.1.7600.16915, 6.1.7600.21092, 6.1.7601.17514, 6.1.7601.17919, 6.1.7601.17725, 6.1.7601.21861 and 6.1.7601.22076

Module description

Quoted from the NIST CMVP entry for this certificate.

CNG.SYS runs as a kernel mode export driver, and provides cryptographic services, through their documented interfaces, to Windows 7 kernel components. It supports several cryptographic algorithms accessible via a FIPS function table request irp (I/O request packet).

Approved algorithms (11)

AlgorithmCAVP certificates
AES1168, 1178
AES GCM1168
AES GMAC1168
DRBG23, 24
ECDSA141
HMAC677
KASvendor affirmed
RNG649
RSA559, 560
SHS1081
Triple-DES846

Other algorithms

AES (Cert. #1168, key wrapping; key establishment methodology provides between 128 and 256 bits of encryption strength); DES; Diffie-Hellman (key agreement; key establishment methodology provides between 112 and 150 bits of encryption strength; non-compliant less than 112 bits of encryption strength); MD2; MD4; MD5; HMAC MD5; RC2; RC4

Tested configurations

  • Microsoft Windows 7 Ultimate Edition (x64 version)
  • Microsoft Windows 7 Ultimate Edition (x86 Version)
  • Microsoft Windows 7 Ultimate Edition SP1 (x64 version) (single-user mode)
  • Microsoft Windows 7 Ultimate Edition SP1 (x86 version)

Validation history

DateTypeLab
2010-08-12InitialSAIC-VA
2011-06-01UpdateSAIC-VA
2012-02-09UpdateSAIC-VA
2013-01-24Update

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 historical
  • Validation dates on record: 2010-08-12, 2011-06-01, 2012-02-09, 2013-01-24

Source documents