# 646 — FIPS 140 validated cryptographic modules: active, historical or revoked

For 646, vendor is PostX Corporation; module name is PostX FIPS Cryptography Kernel; module type is Software; validation date is 04/03/2006; status is Historical, verified against its source on 2026-08-05.

- **Certificate number:** 646 _(verified: appears in the quote below)_
- **Vendor:** PostX Corporation _(verified: appears in the quote below)_
- **Module name:** PostX FIPS Cryptography Kernel _(verified: appears in the quote below)_
- **Module type:** Software _(verified: appears in the quote below)_
- **Validation date:** 04/03/2006 _(verified: appears in the quote below)_
- **Status:** Historical _(verified: appears in the quote below)_
- **Standard:** FIPS 140-2 _(verified: appears in the quote below)_

## What the source says

> 646 | PostX Corporation | PostX FIPS Cryptography Kernel | Software | 04/03/2006 | Historical |

## Source

- https://csrc.nist.gov/Projects/cryptographic-module-validation-program/validated-modules/Search?SearchMode=Advanced&Standard=140-2&CertificateStatus=Historical&ValidationYear=0

Last verified: 2026-08-05. Review by: 2026-09-04.
Part of [FIPS 140 validated cryptographic modules: active, historical or revoked](https://referencesource.org/fips-140-module-validation-status/).