mfkdf.com

.com crawl

First seen 2026-04-25 · Last seen 2026-05-19 · ok HTTP/1.1 200 220 ms crawled 2026-05-19

US · 172.67.153.170 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: Multi-Factor Key Derivation Function (MFKDF2) by Multifactor
Description: The Next-Generation Multi-Factor Key Derivation Function (MFKDF2) is a function that takes multiple inputs and outputs a string of bytes that can be used as a cryptographic key. It serves the same purpose as a password-based key derivation function (PBKDF), but is stronger than password-based key derivation due to its support for multiple authentication factors, including HOTP, TOTP, and hardware tokens like YubiKey. MFKDF also enables self-service account recovery via K-of-N (secret-sharing style) key derivation, eliminating the need for central recovery keys, and supports arbitrarily complex key derivation policies.
Language: en

Open Graph

url: https://mfkdf.com
title: Multi-Factor Key Derivation Function (MFKDF2) by Multifactor
locale: en_US
site name: MFKDF2
description: The Next-Generation Multi-Factor Key Derivation Function (MFKDF2) is a function that takes multiple inputs and outputs a string of bytes that can be used as a cryptographic key. It serves the same purpose as a password-based key derivation function (PBKDF), but is stronger than password-based key derivation due to its support for multiple authentication factors, including HOTP, TOTP, and hardware tokens like YubiKey. MFKDF also enables self-service account recovery via K-of-N (secret-sharing style) key derivation, eliminating the need for central recovery keys, and supports arbitrarily complex key derivation policies.

Technology

CDN: Cloudflare
CMS: Next.js

Third-party hosts loaded (2)

img.shields.io×9
nair.me×1

Social

Registration

Registrar

Cloudflare, Inc.

Created

2021-12-01

Expires

2026-12-01 195 days left

Updated

2024-02-20

Name servers

amit.ns.cloudflare.com
heather.ns.cloudflare.com

DNS records live

NS

amit.ns.cloudflare.com
heather.ns.cloudflare.com

MX

10 route2.mx.cloudflare.net
51 route3.mx.cloudflare.net
6 route1.mx.cloudflare.net

TXT

MS=ms76003910
google-site-verification=QbPIdzamswiCNZO3QuSD1WAh4o-1zgcZHBo2OeZcLj0

Email authentication weak

SPF: v=spf1 include:_spf.mx.cloudflare.net ~all
softfail (~all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

WE1

from 2026-05-08 to 2026-08-06

Expires in 78 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://mfkdf.com/

present

x-content-type-options
referrer-policy

findings

missing HSTS
missing Content Security Policy
missing frame protection
missing Permissions Policy

Header values

referrer-policy: strict-origin-when-cross-origin
x-content-type-options: nosniff