DES Algorithm (Data Encryption Standard algorithm) | Complete Working | Types - Double & Triple DES

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--------------------------------------------------------------------------------------------- In this network security video tutorial we will study the DES algorithm in cryptography. DES also known as Data Encryption Standard algorithm is one of the most famous and widely studied algorithm and is very important to study especially if you are a Computer Science or Information Technology student. We will also study and understand the variations of DES that is the Types of DES.
Types of DES -
1. Double DES
2. Triple DES
2.1 Triple DES with 3 Keys
2.2 Triple DES with 2 Keys

Data Encryption Standard Algorithm(DES) -
1. The Data Encryption Standard (DES) was developed in the 1970s by the National Bureau of Standards (NBS)with the help of the National Security Agency (NSA).
2. DES is a block cipher.
It encrypts data in block size of 64 bits each.
3. It produces 64 bit of cipher text
4. Same algorithm and key are used for encryption and decryption.
5. The key length is 56 bits. The key originally consists of 64 bits; however, only 56 of these are actually used by the algorithm. Eight bits are used solely for checking parity, and are thereafter discarded. Hence the effective key length is 56 bits.
6. Consists of 16 steps, each of which is called as a round. Each round performs the steps of substitution and transposition

DES is Based on two fundamental attributes:
1. Substitution - also called as confusion
2. Transposition - also called as diffusion

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#DES #DataEncryptionStandard #NetworkSecurity

[SimpleSnippets]

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[mohanveerubhotla]

Very clear and to the point, no unnecessary stuff and made the topic sound interesting. 28 mins of explanation was up quickly ..simply superb Thank you!!

[closer]

Bhaiya, Can you continue this? This is Gem .You make it look so simple. Truly Amazing .I wish their were more videos for this subject.🤧❤

[tarunjoseph]

You are the Best. Went through multiple videos did not understand anything.Watched your videos once and understood everything. Stay amazing

[shubhamingle]

Thanks man, it was the "BEST" explanation of DES!

[PC-kyqo]

Thank you very much. I was literally searching for a proper explanation of DES and found this. I really appreciate your work. Thanks a lot.

[pratiklohar]

In 2.1 step initial 64 bit key is available then every eighth bit is discarded hence 56 bit key is available but presentation and diagrams were way better than any other videos present on you tube I have seen so far.

[LevisRaju]

just few hours to xam and u made me learn it in just 10-15 mins.
just one watch is enough to grasp it <3
.
god bless u

[vincentdagenais]

Wow super well explained and simple to uderstand thanks you!!!

[hanshenriksen]

Thanks bro, u saved my life, finally something simple and precise, is the best explanation ever seen about DES, thanks alot

[blessed]

This was the best and most thorough explanation of this concept thank you so much!

[urvivirkar]

Thank you soo much for the video sir. U made learning this DES algorithm so fun and simple. Great work 😊

[gollayashaswini]

Really helped me for my last minute preparation of exams. Thank you soooo much.

[nagarajm]

awesome lecture by you sir ..you made it an easy task forme to learn des alg. Thank you so much sir

[ketaksingh]

Best video
Took screenshots of this and made my notes

[kanikaKD]

Simple & very easy to understand..

[harshinirao]

Thank you very much! The explanation was very clear and easy to understand. The video was very much helpful!

[brindapatel]

Nice made very easy for me to understand the concept. Thank you for this good efforts.🙏🏻

[theharshavinash]

Nowhere in the video has it been explained where the key interacts with the rest of the code.


For anyone asking the key and the output of step 2.2 is put in a XOR condition that's the reason why you expand in the first place once the XOR operation is complete the output is piped to the stop 2.3

[abhinavch]

Best DES Explanation
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Plz, do a video on AES