So we'll get started with this one and we've got uh Vindhya. If
she is here and then Edward.
And you're welcome to start. You can share your screen if you've
got a presentation to show.
Vindhya, do you have something to present?
She posted in a chat to give her a minute.
Uh, yeah.
OK. Gotcha.
Sorry.
Hello. Good evening everyone.
I'm trying to share my presentation.
Let's see.
OK.
I saved it on my intern folders.
I think I'm not doing this sharing correctly.
Do you have the file open?
I do.
I also uploaded on my interns folder.
Well, as long as you have it open, once you go into share,
you just pick the window you want to share, which is
typically if you have it open, it will be your main screen, the
main window.
OK.
OK. Can you see this? I think I shared it.
Yes.
Yep.
OK so.
For my topic for today is impact of technology on children's
growth and development.
I work with children on daily basis because of my role as an
elementary school teacher and this topic is very important to
me.
It is also extremely concerning when I see that overuse of
technology can have devastating effects on a child's.
Uh. Psychological, physical and behavioral health, and therefore
I decided to present on the impact of technology on
children's growth and development.
So my introduction slide technology has become an
imperative part of today's society, whether it is at home
or in school, children are using many forms of technology, such
as smartphones, iPads, tablets, laptops, computers, PlayStation,
Roblox, Xbox, Nintendos, and the list goes on.
That usage of technology amongst children, whether they are in
elementary, middle or high school, has increased
exponentially in the past few years.
Innovation is beating up and impacting children increasingly.
Look into the past and the present. So about a decade ago,
children used to play outside all day long, riding bikes,
playing sports and blind kites. But nowadays children play games
on their devices and stay indoors and thus they limit
themselves to creativity and imagination.
There are positive impacts on technology and so I came up with
three, but there are even more positive impacts.
And the first one is according to me is research and critical
thinking.
The Internet provides access to a great deal of information and
resources, which helps children learn about various topics.
Umm, the second one is language development.
Children learn their language easily.
Umm, especially complex vocabulary by listening to
educational videos that talk.
And the third one is self-confidence and
self-expression. Children learn how to share their thoughts
online, which is a very powerful tool to build confidence.
Also, they learn how to connect with others.
And now I would like to talk about the negative impacts of
technology.
Held problems.
Increased use of technology slows down the brain.
For example, children rely on devices to solve problems rather
than using their own brain connections to work through a
problem.
Also, they don't get enough physical exercise which causes
weight gain and obesity amongst children.
Besides increase use of screen time effects with their sleep
cycle.
Second one that I have personally noticed, this one is
bad handwriting.
Technology has ruined handwriting, specially cursive
handwriting.
Students in the past, they used to write handwritten papers,
which is now replaced with word documents.
They get less practice writing on paper and more practice
typing on docs.
Now, at one relationships children are getting used to
being alone and losing the desire to engage with their
parents, family and friends.
And still more negative impacts of technology are continued and
there are even more harmful.
Exposure to harmful online content and sexual exploitation.
Children of all ages are able to bypass the age verification
systems of social media such as Facebook, Instagram and Tiktok,
and that's how children get into direct contact with online
predators.
Cyberbullying, and I'm sure we all have heard about this. This
includes posting or sharing negative and harmful information
about someone else.
Suicide amongst cheap teenagers has also increased significantly
due to cyber bullying.
Low self esteem and increased anxiety as children spend more
time on the Internet, they become withdrawn from the
society and culture.
So how to protect our children from negative effects of
technology? I came up with these three things. The first one is
increase outdoor activities and encourage sports.
Second one, monitor screen time. The less time they spent on
devices, the better it is.
The third one is monitor their sleep cycle children. They need
as at least 10 hours of sleep per day.
So countries like China are already stepping up to
technology measures for children. Should we be stepping
up too?
China limits uh kids to three hours of online gaming per week
and only on weekends.
The the.
But only on Fridays, Saturdays and Sundays.
This rule still applies during public holidays, according to
the Chinese newspapers.
The Chinese Communist Party in Beijing passed this law that
forbids children from playing video games for more than three
hours per week in order to put an end to what the government is
calling spiritual opium.
And my conclusion is that it is very important for everyone to
come together as a parent, teacher or a therapist and
understand the way technology is impacting our children.
The children are our future. They are the future of America.
We all must act to limit their use of technology in the form of
video game.
On their growth and development, whereas the wrong use of
technology will have a negative impact on our children.
And that's all for my presentation. Thank you. And if
anyone has any questions.
Wonderful. That was really great. That was a good choice.
Yeah, I liked it. That was pretty good. I liked it a lot.
Thank you.
OK, Edward.
OK, that's gonna be a tough act to follow, OK.
Umm.
Going to try and share this right now.
Ohh that didn't work. Let me try a different way.
OK.
Give me one second please.
OK. Can you guys see that?
Yes.
OK, wonderful.
OK so.
I am going to be doing a presentation on steganography.
I will also touch a little bit on cryptography towards the end.
Umm.
First of all.
So what is steganography? Uh it is the practice of hiding a
secret message inside of or even on top of something that is not
secret.
Comes from the, uh, believe us Greek state steganos, which
means hidden and graph.
Uh, which he goes to right. Steganography equals secret
writing.
Uh. The earliest example, according to the Guinness Book
of Records, is a from Hysterias who shaved his servants head
before tattooing a warning of impending attack from the
Persian army.
Uh. Once the servants hair grew back uh, he was sent to deliver
the message, which was revealed when his head was shaved again.
As you can tell, the the wall was not impending anytime soon
as his hair was able to grow back in time.
So how is it used today?
Steganography is used by hackers IT professionals to hide
messages within an image.
It is also used to deliver attacks using PowerShell and
Bash scripts to automate attacks.
So.
The attack is embed scripts within macro enabled Excel
sheets and word documents.
Trying to kind of bypass the.
Uh firewall mechanisms.
How an attack may occur so a victim may click on an Excel
document which has been modified using steganography.
Launching the document activates the PowerShell script.
Following this, this script installs an installer app onto
the device.
Which is done in almost milliseconds and then the
installer is so subtle, avoids detection from the from the
user.
So if uh, if the the protections in place don't already have the
signatures, if it's a.
Like if it's a zero day attack, then it's probably gonna be able
to bypass the downloader connects to the Internet and
retrieves updated versions of malware which then compromises
victims device.
This is a procedure that has been used for ransomware, such
as ****** or Trojans such as rovics and pillow mint.
So how to detect steganography?
Uh security analysts and fret hunters uh work to identify the
tactics, techniques and procedures of attackers and pen
testers.
Using tools such as Mita. Ohh sorry.
And they are identify the typical signatures of the
steganography steganographic applications. Sorry, it's a
tricky word.
Antivirus applications can identify moves made by
steganography, steganographic applications, and the signatures
will be continuously adapted to Fort detection.
Umm.
So a tool that is used quite common commonly in staging and
graphy.
Is uh digital invisible ink toolkit.
And it can be used to hide any sort of file inside a digital
image.
Umm.
The link is from SourceForge.
As you can see.
Going to use a laser point so there's a few different.
Tools available so you can encode the image.
Using.
You can import your image here can be in in a any type of file
format, but I've created an example later where it's a dot
text file, so you can then also use a cover image.
And then also.
Protective using a password down here. There are different
algorithms with different.
Different, uh, kind of strengths.
And then also down here with the stego image, I believe you can
also write using one image and then display a different image.
Uh, we can also decode once we've encoded.
Uh, simulate and analysis, which I will cover in the next couple
of slides.
So here is an example of steganography.
This year is the original Untouched Cove image, and then
over the next 4 images are the various algorithms that are
used.
To change the image.
And although all four or all five look identical.
There are slight differences which allows the input of data.
Which can be decrypted to read the message.
As you can see, a message is inserted by changing the colors
of the pixels slightly.
And the change is so small, the human eye struggles to to
differentiate.
And each image uses the encode function.
Umm.
So.
Here is a simulation of the image.
The output picture is a black image covered with greater white
dots. The white dots represent where the file is hidden.
And the wider the darts, the more information inside that
pixel so.
This kind of demonstrates how much data is hidden, and if you
were to look at the original, there's a they've kind of. It's
like putting a filter on onto the image.
Yeah.
Steganalysis so.
Once the image has been encrypted.
There's a couple of methods that can be used to see how effective
the.
The encryption is.
So.
The lower the number, the more effective the message is hidden.
On a benchmark, the results would be zero. There is no
difference and one would be a complete opposite of the image.
It was interesting to know that steganography is just an
invisible watermark.
And so it's just something that cannot be cannot be altered.
So here I've put together a little demonstration of how we
can encode a picture with a text file.
So here I've taken the pity global logo.
And I've created a hello world text.
Over here.
I've used the pedo pedo global as a cover image.
And I used just the basic battle Stag algorithm.
And I again just she used the Purdue global image I believe
you could have used a different image.
So here is the hello world and you'll if you know, here is the
the title is hello.
On the next slide, I've shown the reverse process of decoding
the image to a text file to receive the hidden image. So
I've taken the Purdue Global, which was encrypted with the
image.
And I've picked a message file to write to, so I've had to
change your. Create a blank. Note notepad.
Blank uh text file so I created just a message.
Message file.
And then decrypted.
I have retrieved the message and received the Hello will message
back.
As you can see, the Purdue Global University logo is pretty
much unaltered and unchanged.
Looks identical.
Umm.
So that was that on steganography.
I I wanted to touch on a little bit of cryptography and a
website that has.
Uh, for really enjoy using when trying to identify cyphers,
particularly in the treasure hunts, and ohh some of those
identifiers so here.
I've taken a encrypted text.
And place it into the uh cipher identifier.
Uh and analysed and it's giving me a couple of different.
Recommendations of what the cipher might be.
As the Seasar and ROTC software are pretty similar, just giving
me those two as recommendations.
So why did? You can see I've decrypted the text using the
recommendation recommended RT Cypher and being given the.
The answer? Perry global.
And this was at Oz, adding 13 onto the letter as a rotation.
I also did, uh, a rail fence example.
Where I encrypted the phrase here.
And then place it into a rail fence.
And so the rail fence.
As demonstrated here and it gave me a gave me the answer below as
purdueglobal again.
With free lines and then diagonal downwards upwards
downwards.
Umm.
So what I wanted to touch on was the National Cyber League as
kind of a.
A reasoning really is to why I've like kind of gained an
interest in.
Steganography and cryptography Dev.
Multiple topics that are over here.
Open source intelligence cryptography, password cracking,
log analysis.
Network traffic analysis, wireless access, exploitation
forensics, scanning, web application, exploitation and
enumeration and exploitation, and for anyone that hasn't
competed in the National Cyber League, I would highly recommend
it. It's.
Provides a great practical skills and.
Kind of. It talks you through certain certain kind of tasks.
Most recently I've just been doing the password cracking and
using hash cap.
And it.
Kind of provide you with some tutorials as well.
And it's a great tool.
Uh for learning for the skills.
And that is it from me.
Uh.
Not sure how long that was in terms of 15 minutes, but.
If there are any questions.
That was great. That was really something to think about.
I don't know how I would ever find it in anything that I
Yeah.
received, but that's awesome.
Yeah, I was gonna say the same thing. I I wouldn't even really
know much about this unless you did that. It was a really good
presentation. Thanks for that.
Yeah, that was great. Does anyone at you write on time?
Thank you very much.
It's 8:30. So you're right on time.
Anybody have any questions for Vindhya or Edward?
Well, I have to say you guys did a great job in your master
class. Exactly what I was thinking. I think it's wonderful
to hear what you guys are interested in and what you've
become.
Master in right. As you're learning, we're learning. So
thank you very much for the information that you've
provided. And if there's nothing else, I think that's it for
tonight and we can go ahead and leave early. But sounds good.
Everybody have a wonderful Labor Day weekend, which really starts
tomorrow for a lot of people. But you know, you're probably
still working, but the school itself PGIP with its calendar.
Considers Saturday and Sunday and Monday closed for the
school. In other words, they are out, but that does not mean that
the internship stops. You can still build hours if you want
to. If you're behind, you can still do some work if you want
to. The system does not shut down, so you can still collect
hours if you want to go ahead, carry.
Are we? We're still having our meetings on Monday, right?
This Monday, we are not, so no meetings this Monday, I'm gonna
Ohh OK.
go ahead and shut those down.
Umm, I think.
Sof Dev had theirs tonight, 4 next Monday and you know it's
totally up to your leads. If they want to reschedule one for
another day for next week and I'm sure they'll get back to you
if they feel that way. But there is no meetings on Monday.
Thank you.
Put quick question kind of the this kind of the add on what
Go ahead.
Perry said.
Is it acceptable for like the students to kind of get
together, just have our own little meeting and kinda talk
about a few things and maybe strategize amongst ourselves
that acceptable?
Absolutely anytime, as long as it's not something that is set
On Monday.
OK.
to.
Umm.
Continue on like week after week because at that point if you set
it up and then you leave, I have to become you to get rid of it
out of the calendar.
No, I wouldn't do that. So you watched.
So, but what you can do is you can call each other and you know
have a meeting. You're welcome to do that. And I would even say
go ahead and and record it too if you can. If you have a lead
OK.
with you, go ahead and record it. And that way you know,
others can look at it and then you can put it into your
departments stream and they can look at it later.
Uh.
Thanks. Thanks.
Absolutely. You're welcome.
And if that's it, I welcome everybody you know. Thank you so
much. Can't wait for the next master classes to see what
everybody comes with. Bree is next week.
Waiting for her.
Master Ness.
But you guys have a great safe.
Weekend Labor Day weekend and have fun.
Thanks everybody.
You too, thank you very much.
Thank you very much.
Thanks guys.
Goodnight.
Great presentations.
You know.
Thank you. Have to say, steganography is a difficult
word to pronounce.
It's a very cool thing though.
I get you. Yeah.
Mine is instances that ones a big hot. It's a hard one
instances.
Thanks everybody.
Thank you. See you guys.
My.
Thank you. Alright, bye.