CS50 Cybersecurity - Lecture 0 - Securing Accounts

[@raghumanvi8489]

Today I got placed in a IT company and without mr.david this would not have been possible. My deepest gratitude to you from the bottom of my heart.All your courses are amazing and the way you explain the concepts makes it even more amazing people like you should live forever.......❤ Big fan from India❣️

[@YourDad-ho5ml]

How did you start?

[@raghumanvi8489]

@@YourDad-ho5ml start with cs50 Hardware, C and data structures playlist after that choose a domain like AI, Cybersecurity, cloud or anything u like (before this u should explore all the branches of computer science )then try to study it an year attend hackathons college level competitions

[@KamikazeChiya]

yeah man congrats ! how did you started ?

[@raghumanvi8489]

@@YourDad-ho5mlstarting with cs50 algorithms course then networking, Python, Linux OS then particular courses on Cyber security on KZbin only

[@Mad_Monarch]

David Malan is hands down the best thing to happen to mankind since the discovery of fire and invention of the wheel.

[@davidjmalan]

Thank you!

[@MB-hz7wm]

Malian's one of my favorites. He was how I first became interested in Comp Sci years ago. His CS50 courses are great.

[@davidjmalan]

So glad to hear!

[@jktamag]

I am happy that I took this course...learning a lot on the topic that I use everyday...and important part of my life...thanks for this great course..I think everyone should join this course...a massive benefit!!

[@Father-klovkoski]

Great general knowledge on keeping my accounts secure. Almost done through lecture 4 and am grateful for all the free information! However I’m hoping cs50 will continue with this series and provide more structured information that directly relates to skills required to following a cyberops career. None the less we do already have Googles Cert for that, just wish it had cs50’s style and energy that really engages you!

[@milakohen630]

kzbin.info/www/bejne/bHOZimium9tkrZIfeature=shared

[@user_shivshakti_1111]

David Sir Grateful to you for all your teaching. Love the way you share your knowledge with us

[@leon9144]

I absolutely love this course! This feels more like entertainment or art rather than a lecture.

[@v2.verniumen]

CS50 just posted a Cybersecurity lecture! I've been preparing myself by collecting lectures around the Internet and CS50 will surely pump me up

[@ElvisAustin15]

David Sir Grateful to you for all your teaching. Love the way you share your knowledge with us

[@yimikjohns]

What does this man not know! I love Prof. Malan's approach. If you've gone through him, you went through one of the best in the land!

[@seetsamolapo5600]

- Threats to accounts and defences - Authentication - verifying/proving claimed identity - Authorisation - what allowed access the authenticated principal has - username - uniquely identifies user in the digital world publicly - password - uniquely verifies user (claimed identity) - dictionary attack - trying multiple actual words to impersonate a valid user by a bad actor - brute force attack - trying all possible combinations of characters/letters for short passwords which have lower possible combinations thus lower security - the goal is to have a long enough password for possiblitities that exceed average lifespan but not too long to lose usability via forgetfulness - NIST password policies (types of policies)

[@ayoub-rk1ut]

From the bottom of my heart : thank you David

[@synen]

Thank you Professor David Malan, as always, a pleasure.

[@bobjoe1343]

for a sec, to me it looked like your name was semen

[@alexrabola]

@@bobjoe1343 lol

[@chancesire]

Professor Malan has great delivery.

[@yurhighness1998]

professor of all time

[@wsaaccount-iu6nt]

You are my fav professor after School

[@hardymatamoros815]

Professor David always is good to listen to your lecture. Happy to be part of your class.

[@davidjmalan]

Thank you!

[@255py8]

dude i have been watching your lectures since 2015

[@benaiahmuganzi4623]

I won't say that he has great delivery, instead it is excellent. Its like hes ws made for this. Big up.😊🎉🎉🎉

[@htyvty9981]

Thank you Harvard and thank you professor Malan!

[@inux7281]

Most awaited....Lots of love from Bharat Hope to see ML and DL from Harvard CS50

[@som4971]

yes same

[@andrean40]

I just want Java 😅

[@inux7281]

@@andrean40 I don't see it coming

[@andrean40]

Maybe. But at least they have an all Python one lol

[@diano2003]

I can listen to him all day long

[@cyb3rkahn]

An Informative tutuor. I adopted the professional teaching method of David Malan and implemented it in my college.

[@randy4ii411]

Wow David, you get better and better at this.

[@jcv891]

Infinitamente agradecido!!! Saludos desde Argentina

[@SomebodythatIusetoknow123]

Teaching beast 🔥 Thanks for the work to you and the team ! love the CS's courses.

[@carsaddict977]

at 1:00:35 if the only credentials like user name and password is compromised then the adversory can access end number of accounts via sign in with same credentials so will not that be at risk ?

[@AkshayGurav-o8b]

keep coming up with more like this

[@chidebrutechs]

Great work Prof, God bless you.

[@paulus7558]

Now i have to take this too! thank you cs50

[@perfectambience108]

28:20 (This comment is for myself. To come back tomorrow again and continue with a simple press on the timestamp.)

[@debojyotighosh5717]

Your lectures are so addictive😅

[@alexrabola]

The Best , thank you Prof. David

[@Nafis586]

Literally i need 0.75x to watch davids video 😅😅

[@milakohen630]

I still love live lectures ❤❤❤ great job , everyone! 🎉

[@ibiyemisamuel6082]

Professor David on it again 🔥😌

[@haibaidzokwomandre1468]

This first course made me to discover and start loving Cryptography.

[@Rafifkhalidpermana]

alhamdulillah, thank you prof. from gorontalo, indonesia.

[@sunnybebong5557]

from Vietnam with love

[@O-VideoProduction]

🎉Cs50 Cybersecurity Citizens.

[@caiibae-quit2707]

How I like to think of the password possibilities is how many different numbers are there to the power of how much numbers are required to open up the system

[@oyekanmibamidele6196]

I thank God I'm alive seen David Malan as a lecture

[@kritikusi-666]

jeez, how fast is that computer. I am running a 4090 and i9 and it is still going. Do I need to change properties or something so that the IDE uses more resources? I see my CPU is at 20%

[@cola5323]

It takes about 7 minutes for my computer to finish printing all 72 million combinations of four alphabets (lowercase and uppercase) - is your computer like really fast or mine too slow? :’)

[@dh4913]

Mr. David if you don't mind, I'd like to ask a question about using biometric as password. Say if one of my passwords are compromised (e.g: thumbprint, facial recognition, or voice recognition), how do I prevent further damage from the event? (Because we can't change our face or fingerprints as easy as a text based or knowledge based password.)

[@davidjmalan]

Best you can probably do is switch away from using that particular factor, especially voice! Cf. uwaterloo.ca/news/media/how-secure-are-voice-authentication-systems-really .

[@shaminamina6406]

You are the best sir ❤

[@ThisisYugal]

Great that's what im looking for, from so long 👍

[@lkgpuanimho0349]

18:37 Prof. Malan, how long would it take for a quantum computer to crack that?

[@italiaman]

Just finished CS50 and i get this

[@milakohen630]

kzbin.info/www/bejne/bHOZimium9tkrZIfeature=shared

[@mikewazowski7526]

David is the best

[@K_for_kakarot]

David malan sir you are a legend

[@zaynsaifi5331]

all right this is cs50

[@blogcorpo]

Amazing lecture!

[@lady15n]

one interesting thing happened few days ago , my 3 google accounts got hacked but other 1 not fun thing is other 1 was my main account and password was reveresd version of other accounts passwords , may I skipped something to know ????

[@herald1953]

i have 2 questions about security, that i hope everyone here able to answer: 1. Is it better to use offline password managers, browser extension app password manager, or standalone software on pc/mobile, or even built-in password manager from the browser? 2. Should auto login features be avoided for non-tech savvy person that doesn't really aware about cybersecurity?

[@Raghavgarg131]

Will cryptography be also covered in this course ?

[@Tytsplace]

Thanks alot for knowledges.

[@sodom87]

I've been waiting for this! Thank you guys

[@Notorious2108]

19:15 "Might not even be on this planet anymore" - "And that's indeed the goal" 💀

[@khalilnaji36]

Just a question about password managers out of curiosity. Doesn't it enable a single point failure? If someone gets into your password manager wouldn't they have everything. Then wouldn't it only be like a less than minute until everything is gone? If not then how do they prevent a single point failure?

[@davidjmalan]

Yup! Though the presumption is that it's a lot easier to keep one, primary account safe than N different ones. And even that centralized risk is hopefully a net positive over using many insecure passwords!

[@khalilnaji36]

@@davidjmalan oh okok that actually makes sense. Thank you for answering!

[@seanbrendangarrette7644]

I think that this question was addressed by the Prof when he presented the password managers.

[@inux7281]

How about I am trying 94 different places and they are divided in to 10 more and central tracking of all through it. Is it quantam approach, please correct me if I am thinking something else...

[@byrospyro4432]

This is called a distributed network attack. It's a type of password cracking that uses multiple systems to brute force a password. I've also seen pen testers use multiple IoT devices like raspberry pi's or machines with multiple GPUs to crack passwords. Usually instead of a bruteforce attack though hackers use common password lists. Sometimes hackers also gather wordlists from websites and use them to crack passwords.

[@inux7281]

@@byrospyro4432 instead of using multiple system, can we use a quantum state trying all possibilities from one central tracking from that quantum state and stop our algorithm if either of it works.

[@inux7281]

this would be the same brute force with more advance computation.

[@Pharizer]

Wow, this is awesome!

[@jsacodes916]

What is the recommended "next steps" after going through this course?

[@Lo_laa]

Thank you for your efforts

[@samirkamrouna6149]

But doesen`t many 4 digit log in systems have a stop/freeze mode when puting the wrong code more than 3 times or something? Meaning they only have 3 attempts to put in the correct code?

[@ashokkumar-zu3by]

One question regarding trying 10000 attempts to login to mobile through hacking, won’t the phone necessarily resist countless attempts to continue further after few failed attempts ? In such case how it’s possible hack in seconds trying 10000 combinations

[@ms-rg5jb]

My greetings to Pr .david malan from Algeria

[@nourdinemiloudi]

حسبت روحي وحدي 😳

[@codernakul]

This is great 🎉 Love it

[@mark-i5]

I wasn't socially engineered 🤣🤣🤣💗

[@AnjaliSingh-nk2us]

i didnt understood the passkey topic pls explain

[@stefan-bayer]

Can recommend Proton Pass as a password manager :)

[@Alice8000]

9:59 at this point he starts sweating 🥵 WORKIN HARD I love this guy

[@jsacodes916]

I would love to know how David prepares for these lectures.

[@EsquireR]

Another good practice is deleting accounts you don't use, as more likely it is old websites that get hacked for such data.

[@uttamsharma9042]

hi Great work

[@gamingarea8348]

can i use this explanation for my defense.

[@claudiamanta1943]

1:56 ‘Can I quickly use your bathroom upstairs [and rummage through your bedroom to find your jewellery in the vanity desk’s drawers]? 😏’. What kind of cyberattack would that be?

[@lovesdoggies1481]

How do they key log u i just got hurt by scammers

[@vinayallavarapu]

Great love it

[@Thea6562]

What app do u use?

[@cnp2z3fyz2zuag8]

bitwarden

[@claudiamanta1943]

3:56 Automation helps (not).

[@not_amanullah]

thanks ❤

[@pratikrathod7294]

Canadian immigration site is using this kind of questions.

[@shrutithakur2221]

39:04

[@shrutithakur2221]

I found the USB with continuous changing code quite fascinating

[@girl4632]

What's in the video

[@ikma813]

Please add Polish subscription 😢

[@asmit4847]

9:00

[@chill_jano7159]

it's perfect :)

[@floriankubiak7313]

Is it really reasonable to allow emojis in passwords? They might change, which is not optimal for tech-unsavy people.

[@EUROSPORTS4TECH]

Love from Pakistan 🇵🇰

[@Alice8000]

GUYS he leaked his own password! 30:50

[@saleelbhagwat]

idk why ... bt i never remembered adobe password

[@SphereofTime]

43:46

[@MRCLoNEOFFIciL]

🎉

[@mrfli24]

Hell, I was socially engineered. Never should trust David :(

[@TochStyle]

interesting

[@MOMO-YYDS]

❤

[@saleelbhagwat]

30:35 😂

[@Listen_02]

Hi, I will appreciate if you help me a little bit with my gmail account I am facing the problem while recovering my account due to 2 step verification. I accidentally factory reset my phone and I didn't have a backup kindly if you help me with this. I shall be thankful...

[@eyesoffloraandfauna8728]

John rambo