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

For 857, vendor is Tumbleweed Communications Corp; module name is Tumbleweed Security Kernel; module type is Software; validation date is 10/26/2007; status is Historical, verified against its source on 2026-08-05.

- **Certificate number:** 857 _(verified: appears in the quote below)_
- **Vendor:** Tumbleweed Communications Corp. _(verified: appears in the quote below)_
- **Module name:** Tumbleweed Security Kernel _(verified: appears in the quote below)_
- **Module type:** Software _(verified: appears in the quote below)_
- **Validation date:** 10/26/2007 _(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

> 857 | Tumbleweed Communications Corp. | Tumbleweed Security Kernel | Software | 10/26/2007 | 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/).