Digital Signature | Blockchain

In this video we will discuss:
Digital signature
Encryption and decryption
Achieving Confidentiality and authentication using a digital signature
#blockchain
#digital signature
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[@vikasgupta-fz2dp]

best use of 3 minute 36 seconds ..... thanks a lot ..

[@rhajvijay]

Navin.. You're gifted with an ability to explain things clearly. One of the best Indian KZbin challenge for learning!!!👏👏👏

[@techwithwhiteboard3483]

channel and not challenge also he hasnt taught anything on blockchain. how to make one on our own lol

[@placement3608]

God is here guys ...thank u very much sir for making each and every concept to be clean and crystal clear....hats off for your hard work for making videos for us .....many many thanks sir

[@dibyanshu2930]

It would be unfair if I doesn't appreciate your skills to explain anything very neatly. Along with your video I also watch other channels also no one can beat you. You r d best.

[@Tuba.k007]

crystal clear...after watching so many videos on youtube .. this was just crisp and perfect

[@exFeeds336]

Amazing. i was confused how digital signature and confidentiality works together . Now i know the order too. Thanks

[@shouvikpradhan1094]

Sir truely speaking you are great , thanks sir ,thanks .If possible I also wants some hands on practical experience by solving some small problem using Blockchain technology

[@ManivannanGD]

#Telusko clean explanation about #DigitalSignature. But I have a question, how the #key's are shared between two persons in virtually. How that works?

[@amitcshah]

What I like is, the "time constraint" of your explaination.. mostly I try to find "to the point" kind of videos.. otherwise we need to keep watching 20 mins video to understand a simple logic with which the real content starts at the end.

[@naschwindias3873]

best explanation ever

[@stocksandblocks9661]

I always follow your videos, they are stunning

[@manojvitharana6512]

What an amazing teacher🥰

[@mohamadrezapirayesh3811]

finally somebody who can explain this shit in just 3 minutes thanks man

[@manoj4480]

Thank you. Great video. Just the last sentence. C can not decrypt it as it is encrypted with A's private key (You mentioned B's public key) Correct me if I am wrong.

[@vishugondaliya7644]

what a great explanation I think you are really gifted with this , explanation of every hard topic so simply .

[@dr.patgiri662]

Short and precise to understand. Excellent.

[@parthivsolanki21]

Your explanation is just wow 😘 Mind blowing sir 🙂 I got it.

[@vinayvipul]

Very great quality videos, explained beautifully and with excellent graphics.

[@indianitguru]

Hello Navin, Great videos and thank you so much for these. I am however not sure if you have explained digital signatures correctly. I think during the digital signatures what we normally do is use the hashing technique along with the encryption.

[@sureshkannan6313]

Excellent teaching.....🤩

[@mangeshpawar2255]

Really worth to learn your tutorial , nice way you tought. Thanks buddy I appreciate your kind efforts. Keep doing ....

[@reenus134]

Very good presentation

[@Skaxarrat]

Very clear and concise explanation. We will see any coded blockchain project?

[@meghhanigam8375]

Best teacher

[@hamidliaqat7283]

awesome ,regards from pak 😍😍

[@AbhishekSharmaDit]

Sir at the end of the video 3:20min if we will use public key of A in then, any third person can also access it! Then confidentiality kaise hua maintain?

[@kisme01]

but only B can decrypt it in the first place? so nobody else can actually intercept and attempt to decrypt it with A's public key

[@AjayJain-ef2mz]

@@kisme01 so 'B' will decrypt it using A's public key. But how does B get A's public key in the first place. Does A share it?

[@himanshugta1724]

Thanks for the simple explanation!

[@vedantkamat8570]

Is this concept the same with crypto currency wallets?

[@bowbowzai3757]

You explained it clearly!

[@lishannavishka1783]

Navin sir, Can you take a scenario there are 5 members, they are doing transaction between each of other I want to know when they are doing their transaction how make Genesis block and other blocks how make digital signature for each block? What Wii happen some persons access one block and changed it hash and how it affects to next block, and you told anyone can not hack all nodes in block chain but some time one node can be hacked when one node hack what happened security of another blocks these are the questions which I have if you can make a practical scenario for block chain that will be help Thank you.

[@yashchauhan5710]

point to point explanation gg

[@chethanr.a.4610]

Navin, what will happen, if A private key is compromised. Is there any option in block chain technology in which keys are regenerated and newly generated public is shared again?

[@sourabhtiwri]

For C we have cryptography A we have digital signature what about Integrity ?

[@nokhaizlolzz]

Excellent thanks

[@amitkadivar9445]

this video helpful in to study.Thanks sir

[@udhayasankar113]

Excellent explanation..

[@apricotcomputers3943]

my question is... how can this be possible for router ip tables??

[@sarikigovind4703]

How can B encrypt A's message.. I need proper explanation..

[@sarikigovind4703]

@Rajesh Bhattarai thank u....

[@sudhakarverma8452]

Very amazing video sir

[@YashPatniyp]

How you earn money ? What is your source of income ?

[@sounakbhowmik2841]

Hey! I was using rsa library in python. When I encrypt a message using a private key, I can not decrypt using the public key. What do you suggest?

[@venky4993]

The name of this channel is telusko Telugu word

[@fazaljarral2792]

Perfect.

[@okechuchukwuchinwuko8430]

Nice 👍

[@himanshukhullar4480]

awesome explanation!

[@ramkumarreddy4295]

Great stuff sir thank u🔥

[@rakeshsanthapuri9933]

Awesome navin

[@divakarreddyperlavenkata9600]

You are super awesome👌👌

[@khetaramsansi119]

Sir, I have USB device that containing digital signature of authorized person, Now I need to add this signature into PDF, I am working in PHP, can you please suggest me how can I achieve it, I am totally confused and don;t have any idea to implement it. I have used the hwcrypto.js and able to generate the certificate, but how do I process it in background and add signature into PDF using PHP. It will be great help from you sir and I am looking forward your positive response for same.

[@nktt9351]

Great sir

[@punitmore]

How to implement it practicaly

[@RobinJesba]

Can't wait.

[@NamanGuptachaloghar]

Can you pls explain little bit more?

[@amanshaw8496]

Here there is two encryption: 1. Encrypted with B public key and Decrypted with B private key in order to obtain confidentiality.. 2. Encrypted with A private key and Decrypted with A public key in order to obtain digital signature I am waiting for how we obtain these function, encrypting with B public key but decrypting with B private key.. How ..

[@yashshende2786]

❣️

[@sivacharan57]

you haven's touched the concept of hashes, without describing hashes I believe the concept of digital signatures remains incomplete.

[@siddharthsingh1827]

Sir please apne hindi channel.mein hindi mein samjhao sir please

[@shubhankargaikwad9706]

Beginners... Try reading the code book by Simon Singh It got me interested into cryptography and now I think I'll read more about it in the rest of my college years

[@hv3300]

Can you please share link for this book... Thanks

[@shubhankargaikwad9706]

www.pdfdrive.com/the-code-book-how-to-make-it-break-it-hack-it-crack-it-d33437693.html

[@chandrareddy2427]

Black chain technology books best tell me

[@sindhubasavanna1927]

master in explaining things in a simple way :)

[@1112sravani]

How does B know that it has to decrypt with A's public key?.....Will it try all public keys?

[@arjunvihaan6745]

it is automatic...i was lucky to be directed to [e-mail]...i cant imagine that my wallet is back and spendable..contact him..goodluck

[@abhilashkokkonda1713]

wow Navin...New graphics looks awesome..and as always great video

[@sonaliumare344]

too good explanation, need more videos how to use blockchain

[@umeshnataraj5951]

Great video

[@Softwareengineeringdev]

good ♥♥♥

[@ullast4]

Where your office?

[@unemployedcse3514]

Awesome bro 💞💞

[@atharva2004]

solving problem of authentication: message is encrypted with private key, and then this encrypted message is again encrypted by receivers public key. so receiver first decrypts using his private key, and then using sender's public key. so now receiver knows who the sender is. this is digital signature.

[@yahiagamal937]

the videos are just amazing but the sound at the begining is really annoying and loud😅

[@aditi22012]

Won't the public and private key be the same? Unless the message can be decrypted by two kinds of keys?

[@MrWandalen]

Public key only for encryption!

[@top10swithkesi]

can we encrypt one text multiple times..??

[@yt.user-zull]

Yes, a message can be encrypted any number of times but you will have to keep every encryption key while decrypting it. Just one time encryption is enough but sometimes for some security reasons two levels of encryption is required (e.g. as explained in this video). Encrypting a message above two levels is not required and its cumbersome.

[@top10swithkesi]

@@yt.user-zull Thanks you brother.😍

[@SS-qf3pl]

how can every one know A's privatte key?

[@sagarworriors1402]

classic clarification. thanks

[@bolludiwakarreddy8487]

Sir what are you going to teach? Blockchain web development or core development?

[@MajorVenkataKrishnaMadem]

outstanding explanation

[@muhammadmughees7551]

very nice explanation

[@Soldier-yu2ml]

Good video

[@Mahesh-gq7fm]

very awesome

[@surajkarna6036]

superb!

[@namangamer8142]

Picture perfect..

[@mdjahidulislam9205]

Grreat

[@anupkhismatrao9280]

❤❤❤

[@MyLamph]

this is very precise. Thanks for this Navin

[@vladimir8895]

Your blockchain tutorial for beginners is one of the best things i've ever found on internet. I have 5+ years of web programming, and now I feel bored with all of this and want to change my field of work. I was looking for some simple and clear walkthrough but found only tons of bs and complete water, but God felt my pain and sent me this GEM of tutorials. 🙏🙏🙏

[@MrAjay51]

thanks very much for doing this in English

[@saikrishnareddy3485]

Ssssir vvvery clear ......😍

[@NAVEENKUMARS12]

What a simple way of explaining a twisted concept. More power to you Navin!

[@devkishanjoshi3897]

Sir can u please make tutorials on competitive programming ...?

[@anuragbose494]

Sir, i couldn't understand the digital signature part. Is it possible to explain how it really happened.

[@rudreshmehta6870]

As private key n u r encrypting B node is decrypting by aa public key Then are you telling that as private n as public key is same?🙄

[@ravindrabangalore2990]

Yes agree your point to have asymmetric keys ,but here how we can communicate with more than 1 node or system, here also we need to maintain all public keys and private keys ...what's different???

[@mycreations3452]

I heard in my class in last few days back ,I couldn't understood that..now it's clear .tq sir

[@shreyasingh1258]

woahh thats pretty cool!iam in my second year engg and i regret not watching these videos earlier

[@harishkallianpur9368]

Just excellent..

[@rengarajansrinivasan4356]

The best guider!!

[@anantmohan3158]

Great Sir..!

[@yt.user-zull]

Great..👌

[@nirusanhariharan8382]

I got a doubt sir. What if the third party knew the algorithm which node a and b were using and third party use the both public keys to access it. The private key and the public key can be known by others ( B knew the private key of A). So how to sort out this, sir ?

[@compass2530]

B doesnt have the Private key of A, No one can have the Other person Private key in the network ! So only B can decrypt the message, since only B has the Private key of its own to decrypt the message

[@snehashischattopadhyay9519]

I understood how the encryption and decryption would work. But how does one ensure that this is the private and public key of one item eg A. ?

[@jeromes9186]

You can be sure that a file is encrypted by A's private key by trying to decrypt it by A's public key.