CWNA : New Things Learnt today
Cinemas jamming mobile phone signals #cinemajammers
#EVILTWIN #securityattack – Evil Twin attack
“A Fake WiFi access point is a wireless access point that has been installed on a secure network without explicit authorization from a local network administrator, whether added by a well-meaning employee or by a malicious attacker.” – Wikipedia
Fake WiFi access point is often called as:
- Rogue access point, or
- Evil Twin attack access point
Using this method it is possible to retrieve the WPA/2 passphrase in clear-text within minutes. No need of cracking or any extra hardware other than a Wireless adapter.
In some cases you don’t even need an adapter. When ? that we will discuss
#fresnelzone FRESNEL ZONE
There are an infinite number of Fresnel zones, however, only the first 3 have any real effect on radio propagation.
In Radio Mobile Fresnel zones ove a radio path can be analysed in ‘Radio Link‘ and ‘RMpath‘
Fist, what is it? A Fresnel zone is a cylindrical ellipse drawn between transmitter and receiver. The size of the ellipse is determined by the frequency of operation and the distance between the two sites.
Earth Bulge #Earthbulge
Fade Margin #fademargin
Fade Margin is an expression for how much margin – in dB – there is between the received signal strength level and the receiver sensitivity of the radio.