A Binary Geek

Clef authentication



Neat authentication plugin for WordPress. Clef is a easy to use Multifactor Authentication. You install the Clef app on your smartphone, link it to your website.

When you want to log in. Simply open the App, give your passcode and hold your smartphone in front of the website.

You can set how long your session should be active. You get a notice 5 minuten before your session expires. You can easily extend your time.

Best of all, it is free. Check it out at:

Free Two-factor authentication up to 10 users


I recently discovered a free Two-factor authentication solution named Duo Security. It supports the following authentication methods.

  • Duo Push
    (Duo sends a login request to your phone. Just tap Approve to authenticate)
  • Duo Mobile
    (Generate passcodes with Duo’s free mobile application)
  • Passcodes SMS
    (Receive a batch of passcodes via SMS)
  • Passcodes Phone Callback
    (Duo calls your phone. Just press any key to authenticate)
  • Hardware Tokens
    (Use the passcode generated on your hardware token)


You can use the product on many different platforms, such as many VPN products, Web systems (i.e. WordPress), few Micro$oft products, Unix & SSH login.


Finally LPT Certified

After waiting for a few weeks, today i received the answer. I’m approved as a certified Licensed Penetration Tester (LPT).

Now we can start doing some real Penetration testing… Lets boot Kali right now… 🙂


Got Kali running on my old Acer Aspire 1 Netbook


I still had on old netbook laying around. Time to it to use. It is a perfect size to do some pentesting while sitting unnoticed in a corner. 🙂

The install was pretty straight forward. Just plug my Kali USB stick in, and boot the install. No troubles…



When i try the wireless card, it even does injection out of the box. Now the opportunities come to mind… This would be a great unit for wireless testing.



I started a few tools and they all run smoothly. So far a great install.

Try to get KALI boot from USB on an iMac / Macbook

For a few days i try to boot Kali-Linux from an USB stick on my iMac / Macbook. At first it looks like an easy task. But in reality this is quite hard to achieve.

The nice Apple products use EFI, for that we had to get the bootloader working somehow. There are many forums giving advise on how to get this done. Neither of them work, some indeed show you a nice option on boot, some even try to boot something, but they all fail.

To closest i come is that it wants to start the bootloader, but then i get the famous: “Secure boot not enabled”. Tomorrow is a new day, lets see if we can get pass this issue.