text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
or seem to be coming from Google
or maybe a politician or the like. | 3,031.26 | 4.35 |
And very often those emails are
encouraging you to click a link | 3,035.61 | 4.47 |
and maybe make a donation, click a
link, maybe change your password, | 3,040.08 | 4.71 |
click a link, and
verify your information. | 3,044.79 | 3.48 |
Phishing is all about trying
to use social engineering, | 3,048.27 | 3.39 |
in this case in a technical
way, to try to convince you | 3,051.66 | 3.15 |
through very convincing looking
emails and even websites that it | 3,054.81 | 3.51 |
is a legitimate email
from paypal.com or it | 3,058.32 | 3.12 |
is a legitimate email from a
politician or it is a legitimate email | 3,061.44 | 3.69 |
or request from a
teacher here at Harvard. | 3,065.13 | 2.28 |
But it's not. | 3,067.41 | 1.02 |
What they're trying to do,
the adversaries in this case, | 3,068.43 | 2.49 |
are prey on your trust for those
certain companies or persons. | 3,070.92 | 4.77 |
They're trying to prey on your comfort
with familiar user interfaces, things | 3,075.69 | 5.4 |
that you've seen before. | 3,081.09 | 1.32 |
But unfortunately, it's all
too easy for an adversary | 3,082.41 | 3.63 |
to make a very official-looking email,
to make a very legitimate-looking | 3,086.04 | 3.9 |
website, even one that looks
identical to paypal.com, | 3,089.94 | 3.63 |
identical to Gmail or other services. | 3,093.57 | 2.64 |
And frankly, if you take
some of CS50's other courses, | 3,096.21 | 2.325 |
it kind of boils down to copy and
paste in the simplest of scenarios, | 3,098.535 | 4.725 |
just copying and pasting
some legitimate website | 3,103.26 | 2.25 |
and pretending that you own it too. | 3,105.51 | 2.04 |
So how might phishing manifest
itself in the real world? | 3,107.55 | 2.71 |
Well, consider one of
those social media posts | 3,110.26 | 2.28 |
online that tend to invite you to
comment with your favorite song | 3,112.54 | 3.77 |
from childhood. | 3,116.31 | 1.02 |
Sometimes those posts
have a million responses | 3,117.33 | 2.4 |
from people you know
and don't even know. | 3,119.73 | 2.01 |
But more than being interested in
what your childhood favorite song was, | 3,121.74 | 3.6 |
those posts are very often
phishing for personal information | 3,125.34 | 3.9 |
because suppose that you, or at
least someone among those comments | 3,129.24 | 3.3 |
is actually using their favorite
childhood song as their answer | 3,132.54 | 3.81 |
to some website or app secret question. | 3,136.35 | 2.19 |
Now the author of that post,
not to mention everyone else, | 3,138.54 | 3.03 |
knows the answer to the same. | 3,141.57 | 2.71 |
So how else might phishing
manifest itself in the real world? | 3,144.28 | 3.17 |
If you were to visit a
screen later today that | 3,147.45 | 2.34 |
looks a little something
like this, well, this | 3,149.79 | 2.58 |
looks like Gmail's login page, at least
here in the US when using English. | 3,152.37 | 4.41 |
And frankly, I've seen
this so many times | 3,156.78 | 2.16 |
that I might be inclined to
just blindly type into the form | 3,158.94 | 3.3 |
my email address and then after
that probably my password. | 3,162.24 | 3.99 |
But it's important to begin to
develop an intuition or a suspicion | 3,166.23 | 4.14 |
for when and when these sites
might not be legitimate. | 3,170.37 | 4.32 |
How might you do that? | 3,174.69 | 1.15 |
Well, you should minimally
be looking at the URL bar | 3,175.84 | 2.57 |
and making sure that it is
gmail.com or probably google.com | 3,178.41 | 5.19 |
or whatever google dot
country code, depending | 3,183.6 | 2.61 |
on where you live in the world,
making sure that it looks legitimate | 3,186.21 | 3.42 |
and that you've actually
been there before for. | 3,189.63 | 2.16 |
When you hover over links, you
can very commonly in your browser | 3,191.79 | 3.21 |
look at the bottom, left-hand corner
or some corner of your screen. | 3,195 | 3.46 |
And you can see what URL a
link will actually take you to. | 3,198.46 | 4.37 |
Even though the words on the
screen might say something, | 3,202.83 | 2.88 |
the actual link might
take you somewhere else. | 3,205.71 | 2.67 |
Now, even then, it's hard sometimes
to discern these kinds of things. | 3,208.38 | 3.64 |
But these are just best practices. | 3,212.02 | 3.2 |
You don't need to be so worried that
you don't go anywhere on the internet. | 3,215.22 | 3.3 |
But you should learn to keep an
eye out for these kinds of things. | 3,218.52 | 2.89 |
And in general, with phishing, rather
than trust any link in an email | 3,221.41 | 3.87 |
that you receive, especially
when it's something | 3,225.28 | 2 |
private like a bank account,
something medical, something personal, | 3,227.28 | 3.66 |
well, that's fine. | 3,230.94 | 0.87 |
Open a new tab and
manually go to paypal.com, | 3,231.81 | 3.81 |
Enter, or manually go
to gmail.com, Enter. | 3,235.62 | 3.21 |
Don't just blindly trust these links. | 3,238.83 | 2.01 |
Now, here again, we see a trade
off between usability and security. | 3,240.84 | 3.73 |
It's a little annoying if I
can't just click on a link | 3,244.57 | 2.72 |
and go to the place I want to go. | 3,247.29 | 1.74 |
You have to manually open the page,
type it in manually, and so forth. | 3,249.03 | 3.86 |
But again, it depends on what's
now more important to you, | 3,252.89 | 2.57 |
the usability of that service or the
security of your account therein. | 3,255.46 | 6.45 |
This is even more worrisome when
it comes to two-step verification. | 3,261.91 | 3.51 |
And Google takes some liberties
with the wording here. | 3,265.42 | 2.25 |
This is usually best described
as two-factor authentication. | 3,267.67 | 3.45 |
But again, the most
sophisticated of adversaries, | 3,271.12 | 2.67 |
theoretically, if they
sent you a phishing email, | 3,273.79 | 3.48 |
tricked you into a visiting a website
that looks like Gmail but is not Gmail. | 3,277.27 | 4.29 |
They could theoretically even prompt
you for a two-factor code like this. | 3,281.56 | 4.98 |
And then if they're smart
and savvy enough with code, | 3,286.54 | 2.4 |
they could automatically now send
your username, your password, | 3,288.94 | 3.3 |
and a two-factor code maybe to the
real gmail.com, log into your account, | 3,292.24 | 5.46 |
change your password before you
even get up and running therein. | 3,297.7 | 4.087 |
It's a more sophisticated
threat, and it's not something | 3,301.787 | 2.333 |
you need to worry about as much. | 3,304.12 | 1.41 |
But it's this principle of not just
trusting screens and requests that | 3,305.53 | 5.07 |
are presented in front of you. | 3,310.6 | 1.41 |
You should have this healthy skepticism
and at least some technical savvy | 3,312.01 | 3.36 |
to know how you can decide
for yourself, yes, I | 3,315.37 | 2.82 |
am comfortable with
proceeding with this step. | 3,318.19 | 3.34 |
Now, there's another type of attack,
too, that's more sophisticated | 3,321.53 | 3.41 |
and not one you need to worry about as
frequently as some of the earlier ones. | 3,324.94 | 4 |
But they're generally known as
a machine-in-the-middle attack. | 3,328.94 | 3.35 |
Whereby, if you're on the internet,
there are, suffice it to say, | 3,332.29 | 3.3 |
many other machines on the internet,
very often, between you and whatever | 3,335.59 | 4.5 |
website or app you're visiting. | 3,340.09 | 2.22 |
Often those machines might
be things like routers, | 3,342.31 | 2.88 |
servers that internet service
providers companies, universities, | 3,345.19 | 3.72 |
maybe even your own
home owns and controls. | 3,348.91 | 2.55 |
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