Today we'll analyze how Facebook allowed the leak
of more than 50 million accounts' information
and we'll also talk about the famous Cambridge Analytica case.
I'd like to start off with with a question for you:
Do you know which apps have access to your
Facebook account right now,
and what type of permissions they've been granted?
If you don't have an answer
I'm sure this video will be of interest to you.
At this point, you've surely seen something
in your social media
about the Cambridge Analytica case.
But the truth is nobody explains it in a practical way
and that's why I decided to make this video.
But first, let me tell you what happened:
A couple years ago, around 2014,
a psychologist and researcher named Alexander Kogan
designed a test which, through some questions,
can know what type of personality you have.
After trying it out in a small control group,
he decided to turn his experiment into a Facebook app.
You might remember that a few years ago there
were some quizzes in Facebook
in which, after answering the questions, they determined
which character from your favorite series you were.
Well, the Kogan quiz was similar to those.
The interesting thing is that Kogan,
when programming this quiz,
realized that with this app not only could he know
the personality of those that answered it,
but also he would get access to
the personal information of their Facebook profiles.
Like status updates, their likes, even private messages.
Until now, some of you may think it's normal
that Facebook can collect this type of information,
since you have decided to use their app.
Problem is, back then, the Facebook app not only
allowed access to the information of the people
that used Kogan's quiz,
but also that of the friends of the quiz's user.
This way, Alexander Kogan obtained
the information of Facebook profiles
of more than 50 million users,
after only a little less than 250,000 users
used this quiz called:
"This is your digital life".
Remember that information is power;
and with the advancements on data processing
with Big Data, this type of information
is, without a doubt, a gold mine.
Some time after, the Cambridge Analytica company
bought this database from Alexander Kogan
for about 800,000 US dollars.
And there, things start to get dark.
Cambridge Analytica is a company dedicated to
data analysis for political purposes.
Then, knowing the interests of more than 50 million users,
Cambridge Analytica was hired
by Donald Trump's political campaign.
This story was uncovered since Christopher Wylie,
a 28 year old canadian,
ex-employee of Cambridge Analytica decided to talk
and reveal everything that happened.
What Cambridge Analytica did was
process the information through Big Data
to know which users were most likely
to be swayed into changing their vote
in favor of Donald Trump,
showing them ads and information that
could make them change their mind and vote for him.
This only brings into light a reality that many of you
maybe know already: information database trade.
Facebook defends itself by claiming
the gathered data could only be used for
the app's proper functionality,
and that they could not be transferred
or sold like Kogan did with Cambridge Analytica.
To try and remedy the problem,
Facebook asked Kogan and Cambridge Analytica
to delete the information,
but of course they did not.
Anyway, the data was not only used
to influence the vote of many USA citizens
so Donald Trump would win,
but also to influence the United Kingdom's exit
from the European Union in the "Brexit" event.
And this is what is widely known only.
Unfortunately this does not end here,
since we know this information database
is switching hands among many companies
thus violating our privacy.
This scandal caused Facebook to lose
the amount of 36 thousand million dollars [Note: 36 billion in short scale]
in less than 24 hours.
Facebook says that the data collection Kogan did
for Cambridge Analytica does not mean that
their platform's security was broken,
since "the users gave their info willingly",
and there was no infiltration on their systems
or password theft at all.
A lot of Facebook users decided to delete their account,
affecting its growth in a significant way.
Now, you may ask yourself
just how much does Facebook know about you?
I'll teach you how to obtain a Facebook backup
so you know how much information they have on you.
In Facebook we click on the "Settings" option
and then "Download a copy of your Facebook data".
And click on the "Start my Archive" button.
After approximately a couple hours,
we'll get on our email account a link
to download the Facebook backup,
where we'll find in a detailed way all our posts,
pictures, videos, everything you've ever liked,
and private messages
from the day you created your account until now.
Now, if you use Facebook on Android cellphones,
you'll find a historical record of
all the calls and messages you've made.
All this information is used to profile you
and offer you better products and services
through Facebook.
Now, remember that supposedly, only Facebook
can access this information, and if you didn't know already,
that's the price you're paying for using this platform.
This is is how Facebook allows companies
to increase and improve their sales
using their platform with their ads.
Every time you use an app or game in Facebook,
it tells you the permissions it needs access to.
For example, requesting access to your contact list
or also posting on your wall for you.
Problem is, the vast majority of users
never read these permission requests,
and they end up allowing access to any app
to have full access to all their information.
Now, I'll show you how to see which apps have access
to your Facebook profile, and the
permissions they were granted.
Let's go to the "Settings" section,
and we click on "Apps", on the left side.
On the right side all the apps
with access to our account are shown.
To see the permissions for an app,
we click on the "Edit" button.
There, we can see if it has access to your profile,
your friends list, and etcetera.
If you think this app shouldn't have
access to certain information,
you can simply select it and click the "Remove" button.
According to Facebook, it isn't possible for an app
to access more than your data.
I think that as time passes, with decentralized systems
in favor of privacy
this will all help develop new endeavors
and we may hear about a Facebook successor soon.
Well my friends, that's all for today's video!
I hope you liked it.
If you're new on this channel I reccommend
that you subscribe and enable notifications
so we learn together about ethical hacking and technology.
Remember that my name is César Gaytán,
@mrebola on Twitter, hackwisemx on Facebook
until next time!
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