NETWORK SECURITY - TYPES OF AUTHENTICATION (Message Encryption, MAC, Hash Functions)

[@redmuffler3186]

I had so many "Oooohhhh!!" moments during this. Thank you so much!

[@JustJiril]

Thank you so much sir. I was trying to understand this for last 3-4 hours but everywhere it was over complicated but thanks to you now i'm clear. Thank you again teacher because you are providing and sharing your precious knowledge with us. I'm so inspired by you after seeing you teaching with this passion. Best wishes sir.

[@webnetweaverwebnetweaver9185]

Very concise explanation. This is the best general explanation of application security methods I've seen. Many thanks to you for this!

[@kashmirinsights6597]

Great Video ...First Time In my 4 Years I have Commented Any Tutorial ...Your A Gem

[@sundeepsaradhi]

hi Thanks for your interest towards our channel and your support towards our channel.

[@gowthamiirao9010]

well explained sir. I was confused with MAC and HASH and now its clear. thank you very much.

[@iEntertainmentFunShorts]

Waw awwsome...sir if you guys coming after reading books either kurose and ross or fourozen this is best lecture you found go for it with 1.25× speed.Tq sir

[@sripadkulkarni]

Wow you are a gem... need more people like u in the teaching field who have passion to educate people...I have decided to watch every lecture of yours irrespective of being relevant to my domain of work, I feel I can learn a lot of new things from you... lots of respects and love... thank you!!

[@sundeepsaradhi]

hi kulkarni thank you very much. thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@kalubaeliza4147]

@@sundeepsaradhi thank you sir, well explained kindly sir am requesting a tutorial about Pluggable Authentication Modules (PAM) your positive response I will be highly appreciate💪💪💪

[@attitudeboy2840]

Thank you for your valuable information ✨✨.. This video.. your video.. ofter 5 years also still... Giving.. Knowledge.. for US... Thank you...❤

[@sagarsoni1033]

you are gem... I love your teaching style

[@Jatangi_Raju]

i am cleared all my subjects by watching your videos.......its a small word but, thank you so much sir.😊😊😊😊

[@maheshb3756]

Sir you have helped me a lot sir during my exams time. Your explonation is very goood and clear. Keep maintian that sir. You are one of the best teacher in my study career. I was scared about this subject and i found you on youtube. Now i learned lot of subject. Thank you very much sir.

[@someone1ben]

First Indian Video I never skipped.

[@sundeepsaradhi]

Hi Very nice to see your comment and thanks for your support towards our channel.

[@mayankbhagat4154]

Sir your lectures were really very helpful. You are an outstanding teacher. I would like to suggest that after explaining each of the authentication methods or cipher algorithms you should have explained their advantages and disadvantages. That would have given us more insight. Thanks

[@279aishwaryavallala7]

superb teaching sir am following your lecturs for network security the explaination is very simple and easy to understand simply superb........Thank you very much sir

[@a.yashwanth]

36:00 there is no need to encrypt hash code separately as the entire plain text and hash are encrypted using the key only known to those 2 people. You encrypt the hash code only when the message is sent in plain text format because anyone can modify the PT and recompute the hash code and the receiver doesn't know if the hash is not encrypted.

[@crazyanonymous8393]

Superb teaching iever seen thisi type of techning..

[@md.mehedihasan8324]

Sir , Excellent Lecture..

[@pranavitykyala7887]

neat and crystal clear explanation...

[@sinekas790]

Thank you sir your teaching is very well

[@utsavseth7116]

Beautifully explained

[@2025watch]

Easy way to understand, thanks teacher

[@garima3331]

Great teacher sir!.. thank you so much... very nice explanation

[@zeynepgul551]

Great video, sir. Thank you so much!

[@mehranehk8784]

Great explanation thanks

[@deepar3850]

Thank you so much sir😊😊very much useful🙂

[@rahulsmarty1648]

U r great sir....tnq u for helping me in examination by these Vedio...tnq u soo much sir.

[@HK-sw3vi]

Thanks a bunch, this made things clear

[@karnansooriyakumar8002]

Thank you so much sir i got clear idea about types of authentication

[@Optimistic_aspirant]

Thank you sir...ur videos were of great use ...

[@rajmangukiya114]

fab video sir thanku

[@dr.shemalatha7636]

excellent explanation sir.

[@tejasreechintada8324]

Thankyou for your explanation sir 😅

[@BugsBunny071]

i rarely comment on tutorials but this one was really really good.

[@pnkjthapliyal]

simply great .thanks for the lecture.

[@munagaladivya236]

Nice vedio I understud every thing WT u r explained

[@sundeepsaradhi]

hi divya thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.

[@DuuAlan]

Mate, you are awesome

[@sundeepsaradhi]

hi alan thanks for your interest and support towards our channel.

[@gopinathpanda5889]

sir I have a doubt in hash code. in case-2 of hash code the hash code was decrypted by public key of A.Which is available for all users and anyone can decrypt it.there is no use of private key.How this can be achieved.

[@scatteringparameters.4167]

Genius ⚡⚡⚡

[@amreshpathak6508]

Great explanation sir I appreciate it

[@raghavagarwal6734]

Well done! U have explained well!

[@a.yashwanth]

26:00 if we want only authentication, then what's the point of encrypting the plain text. Only encrypting the MAC is enough. If someone wants to change the PT then he cannot recalculate the MAC and modify it as he won't have the key to encrypt it. edit: oh, that's what hash functions do.

[@venkireddy64]

When r u planning to add other videos in this series sir You are doing awesome job

[@The123bunjy]

Sir, your teaching is really very good, understandable. Please sir also make a separate video for has function, universal hashing and also perfect hashing also.

[@vineetkumar03]

Great Sir Please share the SHA 3 Algo As soon as possible.

[@SachinKumar-kd2fr]

Nicely explained Sir

[@sundeepsaradhi]

hi sachin thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@K6uc]

Lot of thanks sir

[@musabello2315]

❤ god bless you more

[@divyahoney4687]

Good explanation sir tq soooo much

[@sundeepsaradhi]

hi divya thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@rajujoseph2948]

EXCELLENT VIDEO

[@essarshed5197]

thank you sir great session

[@meet.patel18]

30:00 hash function

[@vishavgupta3717]

Excellent Sir

[@amar.mishraamar.mishra9536]

Great Sir.

[@sundeepsaradhi]

hi amar thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@NareshKumar-bl3sy]

Very Nice Lecture Sirji !! Grand Salute!!!

[@sundeepsaradhi]

hi naresh thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@snigdhashingade6097]

thank you, sir ......... great video!!

[@dhananjaychobhe1844]

18:11 MAC

[@everythinguneed__1721]

thank you sir you are the best

[@Ok_dikshu]

Super ga cheptunaru sir

[@sundeepsaradhi]

hi jhansi thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@sagnikchakraborty165]

sir in case of hash function can't we encrypt the hash code using secret key i mean symetric key cryptography technique?

[@sundeepsaradhi]

hi chakraborty of course you can encrypt the hash code with secret key and the same should reflected on receivers side.

[@rohithmallampalli5930]

nice explanation sir

[@thedifferent7562]

I'm confused...you said no key for hash but in the last type of hash function you have used key for both the hash code and the message... please explain :/

[@sundeepsaradhi]

Hi In order to generate hash code we need not use of key on plain text but for acheiving the confidentiality we will encrypt the plain text along with hash code. Hope your doubt has been clarified.

[@paritagojariya5300]

Great Video..!

[@prajjwaltiwari2564]

Great video sir... Sir could u pls explain DES n AES with an example Or its implementation...

[@rohitsain13]

nice work ..

[@sundeepsaradhi]

hi Rohit thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@ManeshThankappan]

Sir. Your classes are excellent. Good to polish fundamentals. Could u give me examples (names) of some algorithm for 2nd and 3rd methods( for Message Authentication Codes and Hash Codes).

[@BrijeshYadav-vl7bj]

Nice lecture Sundeep.

[@sundeepsaradhi]

hi Brijesh thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@mrsrujana6079]

Sir please explain s/mime and pgp format. Tomorrow is my exam. I am hoping that u will upload it soon .Thank you :)

[@mubashareenahmad2404]

What are the authentication functions (c) and hash functions (h) we are applying for the plaintext ?

[@sundeepsaradhi]

hi here the Receiver should know whether the received message is sent from valid and authorized user and this process is called authentication and also the message should not be altered during the transmission and this process is called Integrity. In order to achieve authentication and integrity we will use authentication and hash functions. Hope your doubt has been clarified.

[@lordalbusseveruspotter914]

GREAT EXPLANATION

[@anmaraljanabi7137]

Many thanks for sharing :)

[@narayananbhooma8566]

hello sir,you are saying that hash is independent of key,but in second case your are using secret key for the encryption of the whole message,why?

[@sriharshagade111]

please complete the playlist. It will be very helpful

[@gandesirisrikanth9001]

Hello sir please post the types of firewalls video

[@anaganisaiteja9061]

GURUJI U RRRRRRRRR GREATTTTTTTT

[@deepthideepu883]

Thanks a lot sir

[@sundeepsaradhi]

Hi deepthi Thanks for your support towards our channel share our channel with your friends and keep following our channel

[@telugutechtuts8986]

Sir, at 39:52 you are saying it is independent of key,but you used key in hash and mentioned k in diagram👀🤒😢🤔🤔🤔

[@telugutechtuts8986]

Try to explain clearly sir ,not understand 😅😅😅

[@umangverma3660]

In mac a key is used for generating MAC value... But In Hash no extra key is used for generating hash code by Hash fn... We are only using the Public Private keys And the secret key of symmetric encryption

[@sadaffatima2076]

Very nice

[@prakashghimire8996]

Sir What are the types of authentication services and techniques of authentication?

[@ashwinir5110]

In MAC method, how k1,k2 are exchanged

[@ثنيةارشد]

superb

[@Sourav9835]

How the secret key will be generated and shared between sender and receiver

[@ashidevkc9003]

great one

[@shashankgarg4997]

How does the receiver get to know the MAC code that was applied so that it can it can be compared with the senders MAC?

[@saldi3543]

Big Big Like Thank you

[@sudhanshujha5408]

Sir can you please tell how come the authentication is achieved in 3rd case of message encryption because there reciever is not recognised by the sender and as you say for authentication both should recognise each other so it fails as per that concept🙄

[@rajeekarthikeyan]

U said that Hash functions does not use Keys.Then Why did u Use Public key and Privatekey for encryption

[@kamalajashet5611]

sir will you please explain RC6 and Cast 128 algorithms.. ?

[@sundeepsaradhi]

hi kamalaja definitely i will try to upload them soon.

[@ramaraog4630]

Good sir kindly reveal another topics of network security like rc4,linear crypt analysis and different crypt analysis ,blow fish, except alog

[@sundeepsaradhi]

hi rama rao thanks for your interest towards my sessions and soon i will upload them.

[@web-university]

very nice

[@sundeepsaradhi]

hi harsha thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@PreetiSingh-ko7dm]

can u plz..tell me real workd example...... email id can be an example of second case in messsage encryption?

[@arian7472]

just can you correct me if iam worng hash function is md5 , sha , hmac the first one without shared secret key is md5 or sha the second one with using shared key is hmac

[@kamathprajna]

Thank you sir

[@madhusudhana262]

can you make a video on lamport authentication scheme?

[@kripasindhu1968]

Hi Sundeep, I have a doubt in MAC concept.. Here you are using key to generate MAC, so the key is a Public key or Private key. How does key exchange happen if same key used to encrypt and decrypt

[@sundeepsaradhi]

hi sindhu in MAC the key is secret key ( not public or private ) and the same key should be used at receiver side.The key may be exchanged using Diffie Hellman key exchange or other exchange algorithms. Hope your doubt has been clarified.

[@kripasindhu1968]

Thanks a lot. I got it.

[@syedrashidalishah4646]

keep it up

[@sundeepsaradhi]

hi syed thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.Keep following our channel.

[@priyankamannava4639]

Please explain discrete logorithms

[@shilpijain4668]

Sir please make a video on network security project

[@sundeepsaradhi]

hi Shilpi i didn't get you as there are number of projects related to network security so plz elaborate your doubt so that it would be easy for me to clarify your doubt.

[@shilpijain4668]

I mean to say guidance for project related to network security

[@Michelle-rb6nl]

thank you!🤯

[@kotiprasad5522]

As the public key for all the users will be same for a particular message, then what is meant by encrypting with userA private key and decrypting with userB public key. i mean any user can decrypt with public key of that particular message right.

[@sundeepsaradhi]

hi prasad in two ways we can perform this encryption and decryption 1. encrypting with userA private key and decrypting with userB public key. (here there is no confidentiality as any one can decrypt the message because of using public key which will be available with all users) 2. encrypting with userB public key and decrypting with userB private key. (here there is no authentication as any one can send the message because of using public key for encryption) so in order to achieve both we need to apply the dual encryption and dual decryption by combining these two methods one after another. so that we can achieve both confidentiality and authentication. encrypting with userA private key and then again encrypting using UserB public Key decrypting with userB private key and then again decryption using UserA public key.

[@kaushikdutta9325]

No every user will have unique set of public private keys

[@isha_ch23]

Thank you