Introduction to Basic Cryptography: Symmetric Key Cryptography

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You've messed up the montage a little at 10:25 a bit confusing but still understandable

EBCEu
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Thank you. You make it so easy to understand.

hassanlearning
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Great video. So which is more secure stream cipher of block cipher?

tait
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(in AES) Why/How 128PT +(XOR) 256Key = 128CT ?
Why key bits are double of PT?

tedtdu
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firstly thanks for the video it was really useful!
Please, if I would like to encrypt word not more than ( 3 to 5 letters such as; go, hi, apple, eyes) as an plaintext and my key length (40 bits only) what is a suitable symmetric algorithm that its lightweight and less computational as well as less processing required?
I will glad to hear your suggest and recommend about that? thanks in advance....

ahmedkhallel