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.
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
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.
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.
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
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
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.
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!!
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.
@@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💪💪💪
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.
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.
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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 :/
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.
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.
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.
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.
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🙄
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).
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
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.
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
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.
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.
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.
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.
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
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.
I had so many "Oooohhhh!!" moments during this. Thank you so much!
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.
First Indian Video I never skipped.
Hi
Very nice to see your comment and thanks for your support towards our channel.
well explained sir. I was confused with MAC and HASH and now its clear. thank you very much.
Very concise explanation. This is the best general explanation of application security methods I've seen. Many thanks to you for this!
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
you are gem... I love your teaching style
Thank you for your valuable information ✨✨..
This video.. your video.. ofter 5 years also still... Giving.. Knowledge.. for US...
Thank you...❤
i am cleared all my subjects by watching your videos.......its a small word but, thank you so much sir.😊😊😊😊
Great Video ...First Time In my 4 Years I have Commented Any Tutorial ...Your A Gem
hi
Thanks for your interest towards our channel and your support towards our channel.
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.
Superb teaching iever seen thisi type of techning..
Sir , Excellent Lecture..
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.
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
neat and crystal clear explanation...
Thank you sir your teaching is very well
Easy way to understand, thanks teacher
Beautifully explained
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
Thank you so much sir😊😊very much useful🙂
Thank you so much sir
i got clear idea about types of authentication
Thankyou for your explanation sir 😅
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.
Thank you sir...ur videos were of great use ...
Great teacher sir!.. thank you so much... very nice explanation
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!!
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.
@@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💪💪💪
Great explanation thanks
Genius ⚡⚡⚡
fab video sir thanku
excellent explanation sir.
Nice vedio I understud every thing WT u r explained
hi divya
thanks for your interest towards our channel and share my sessions with your friends and subscribe to our channel.
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.
U r great sir....tnq u for helping me in examination by these Vedio...tnq u soo much sir.
Great Sir
Please share the SHA 3 Algo
As soon as possible.
Great video, sir. Thank you so much!
simply great .thanks for the lecture.
Thanks a bunch, this made things clear
Great explanation sir I appreciate it
EXCELLENT VIDEO
When r u planning to add other videos in this series sir
You are doing awesome job
Good explanation sir tq soooo much
hi divya
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thank you sir great session
Nicely explained Sir
hi sachin
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Well done! U have explained well!
❤ god bless you more
Super ga cheptunaru sir
hi jhansi
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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 :/
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.
Excellent Sir
sir in case of hash function can't we encrypt the hash code using secret key i mean symetric key cryptography technique?
hi chakraborty
of course you can encrypt the hash code with secret key and the same should reflected on receivers side.
What are the authentication functions (c) and hash functions (h) we are applying for the plaintext ?
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.
Very Nice Lecture Sirji !! Grand Salute!!!
hi naresh
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nice explanation sir
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.
Great Sir.
hi amar
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thank you, sir ......... great video!!
i rarely comment on tutorials but this one was really really good.
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?
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?
thank you sir you are the best
Great video sir... Sir could u pls explain DES n AES with an example Or its implementation...
GREAT EXPLANATION
30:00 hash function
please complete the playlist. It will be very helpful
In MAC method, how k1,k2 are exchanged
Great Video..!
nice work ..
hi Rohit
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GURUJI U RRRRRRRRR GREATTTTTTTT
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🙄
18:11 MAC
Sir What are the types of authentication services and techniques of authentication?
Very nice
superb
sir will you please explain RC6 and Cast 128 algorithms.. ?
hi kamalaja
definitely i will try to upload them soon.
Hello sir please post the types of firewalls video
Sir please explain s/mime and pgp format. Tomorrow is my exam. I am hoping that u will upload it soon .Thank you :)
can you make a video on lamport authentication scheme?
How the secret key will be generated and shared between sender and receiver
great one
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).
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
Nice lecture Sundeep.
hi Brijesh
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Mate, you are awesome
hi alan
thanks for your interest and support towards our channel.
Sir, at 39:52 you are saying it is independent of key,but you used key in hash and mentioned k in diagram👀🤒😢🤔🤔🤔
Try to explain clearly sir ,not understand 😅😅😅
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
Many thanks for sharing :)
can u plz..tell me real workd example......
email id can be an example of second case in messsage encryption?
Please explain discrete logorithms
Thanks a lot sir
Hi deepthi
Thanks for your support towards our channel share our channel with your friends and keep following our channel
U said that Hash functions does not use Keys.Then Why did u Use Public key and Privatekey for encryption
Sir please make a video on network security project
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.
I mean to say guidance for project related to network security
Big Big Like Thank you
how PRa is different from KRa
what is digital signature
keep it up
hi syed
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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.
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.
No every user will have unique set of public private keys
very nice
hi harsha
thanks for your interest towards our channel and share my sessions with
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Thank you sir
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
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.
Thanks a lot. I got it.
Sir, I need video on data integrity
Good sir kindly reveal another topics of network security like rc4,linear crypt analysis and different crypt analysis ,blow fish, except alog
hi rama rao
thanks for your interest towards my sessions and soon i will upload them.