Wind Wifi Wpa Calculator
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Note: This Instructable has been replaced with a new Grove based solder less instructable.
In this Instructable you will learn:
- How to build a solar powered system
- How to design and size the panels and batteries
- How to gather data to analyze your system performance
- How to wire up a Raspberry Pi to a solar power system
- How to safely turn a Raspberry Pi on and off
- Building 3D Printed Parts for WeatherPi
And most importantly, have fun doing it!
Wind Wifi Wpa Calculator Free
This Instructable was updated on February 6, 2016 with new parts and wiring list.
What is WeatherPi?
WeatherPi is a solar powered Raspberry Pi WiFi connected weather station designed for Makers by SwitchDoc Labs. This is a great system to build and tinker with. All of it is modifiable and all source code is included. The most important functions are:
- Senses 20 different environmental values
- Completely Solar Powered
- Has a full database containing history of the environment (MySQL)
- Monitors and reports lots of data on the solar powered system - great for education!
- Self contained and monitored for brownouts and power issues
- Can be modified remotely
- Download your data to crunch it on your PC
- Can be modified to do SMS (Text) messaging, Twitters, webpages and more
- Has an iPad Based Control Panel
- Easy to connect to Twitter, WeatherUnderground, etc
This Instructable will show you how to build a WiFi Solar Powered Raspberry Pi Weather Station. This project grew out of a number of other projects, including the massive Project Curacao, a solar powered environmental monitoring system deployed on the Caribbean tropical island of Curacao. Project Curacao was written up in an extensive set of articles in MagPi magazine (starting in Issue 18 and continuing through Issue 22).
The WeatherPi Solar Powered Weather Station is an excellent education project. There are many aspects of this project that can be looked at and analyzed for educational purposes:
- How do solar power systems behave? Limitations and advantages
- Temperature, Wind and Humidity data analysis.
- Shutting down and starting up small computers on solar power
- Add your own sensors for UV, dust and pollen count and light color
Follow along on updates to the WeatherPi story on www.switchdoc.com.
Wind Wifi Wpa Calculator For Pc
Using this as an example for WPA key calculation (link):
I get a hexadecimal key.
I would like to know if there is a possibility to obtain the WPA passphrase by knowing the hexadecimal key and SSID only.
So let's assume I have this:
How can I obtain the WPA passphrase by knowing the hex Key / SSID? Is it even possible?
S.L. Barth1 Answer
The details of the calculation for obtaining the key are described in the link you mentioned:
For WPA-PSK encryption, the binary key is derived from the passphrase according to the following formula:
Key = PBKDF2(passphrase, ssid, 4096, 256) The function PBKDF2 is a standardized method to derive a key from a passphrase. It is specified in RFC2898 with a clear explanation on how to compute it. The function needs an underlying pseudorandom function. In the case of WPA, the underlying function is HMAC-SHA1.
PBKDF2 is a key derivation function that uses a hashing algorithm that servers two purposes. One is to make the process of obtaining the inputs of the function very difficult, and the second to make slow down the brute-forcing process.
To my knowledge, there is no published research that would recover the passphrase from the PBKDF2 output in a reasonable time. Your only option is to brute-force it, that means trying every possible passphrase and applying the process you mentioned and seeing if the output matches your key. There is special hardware, software and even services to make this process faster.
oclHashcat and Pyrit will bruteforce WPA and will use GPUs to make the process faster.
CloudCracker service will try 300 million words in 20 minutes for $17 on your keys.
Cristian DobreCristian Dobre