are you having a crappy week actually
you have to tell me I know you're having
a crappy week there was just a recent
study about cybersecurity professionals
basically said you guys are all
exhausted overtired because you're
overworked because of workforce shortage
well I got good news for you your week
just got a whole lot better because, at
CyberVista, we're introducing a new
weekly video series called questions
that need answers you know we love our
acronyms so quit now and we're going to
be going over some of the most important
cybersecurity concepts both for
certification exams and for your
experience in the real world and today's
question that needs an answer is I think
I spelled that wrong
there's no spellcheck on the light board
so it's really not my fault
an encrypted email has been sent with
what does the sender encrypt the message
all right so let's just sort of recap
the question here all they're saying is
we have an email
and we need to encrypt that email we
want to send it to somebody and have
that same email be decrypted and read by
the other party
alright, in order to get this question
right you have to understand asymmetric
cryptography and remember that's the
system where everybody has two keys a
public key and a private key and these
two keys are mathematically related in
such a way where one encrypts and the
other decrypt and vice-versa
they are faded together like Romeo and
Juliet they're made for each other so
let's look at how this actually plays
out say we have two communicating
parties we have Jordan and I want to
send an encrypted email to their friend
Michael
so if Jordan wants to send an email to
Michael that is encrypted and nobody
else in the entire world except from
Michael can read that email watch what
happens
Jordan is going to encrypt the email
with Michael's public key
why does this matter right because if
one encrypts the other has to decrypt so
if we're going to encrypt with Michael's
public key we know that the only thing
that could decrypt that email is
Michael's what private key exactly and
who in the world is the only person who
has Michael private key that's right
Michael
so the answer is a recipients public key
because a sender is always going going
to encrypt with the recipients public
key remember if you're feeling confident
and you you feel like you have a good
grasp on asymmetric cryptography just
remember you actually don't really
understand it right there's only ten
people in the world who actually
understand cryptography but luckily for
us coming from a certification exam
perspective we're not gonna have to go
too deep into the weeds with
cryptography so again I hope you learn
something I hope this was helpful
hope to see you in class and we'll see
you next week on QTNA
