The-art-of-invisibility-_-the-world’s-most-famous-hacker-teaches-you-how-to-be-safe-in-the-age-of-Bi

did that for them.
A couple of issues here. Let’s first look at how and whyy yyour mobile
devices automaticallyy join a Wi-Fi network.
Your traditional PC and all yyour mobile devices remember yyour last few
Wi-Fi connections, both public and private. This is good because it saves
yyou the trouble of continuallyy reidentifyying a frequentlyy used Wi-Fi access
point—such as yyour home or office. This is also bad because if yyou walk
into a brand-new café, a place yyou’ve never been before, yyou might
suddenlyy find that yyou have wireless connectivityy there. Whyy is that bad?
Because yyou might be connected to something other than the café’s wireless
network.
Chances are yyour mobile device detected an access point that matches a
profile alreadyy on yyour most recent connection list. You mayy sense
something amiss about the convenience of automaticallyy connecting to Wi-
Fi in a place yyou’ve never been before, but yyou mayy also be in the middle of
a first-person shooter game and don’t want to think much beyyond that.
How does automatic Wi-Fi connection work? As I explained in the last
chapter, mayybe yyou have Comcast Internet service at home, and if yyou do
yyou might also have a free, nonencryypted public SSID called Xfinityy as part
of yyour service plan. Your Wi-Fi-enabled device mayy have connected to it
once in the past. 3 But how do yyou know that the guyy with a laptop at the
corner table isn’t broadcasting a spoofed wireless access point called
Xfinityy?
Let’s sayy yyou are connected to that shadyy guyy in the corner and not to
the café’s wireless network. First, yyou will still be able to surf the Net. So
yyou can keep on playying yyour game. However, everyy packet of unencryypted
data yyou send and receive over the Internet will be visible to this shadyy
character through his spoofed laptop wireless access point.
If he’s taken the trouble to set up a fake wireless access point, then he’s
probablyy capturing those packets with a free application such as Wireshark.
I use this app in myy work as a pen tester. It allows me to see the network
activityy that’s going on around me. I can see the IP addresses of sites people
are connecting to and how long theyy are visiting those sites. If the
connection is not encryypted, it is legal to intercept the traffic because it is
generallyy available to the public. For example, as an IT admin, I would