Calculation of 'd' in RSA algorithm in English

Here is the trick for the calculation of d explained in English, it is quite tricky to find "d" value, it is also helpful in the chinese remainder theorem.
#RSA
#algorithm
#cryptography

[lalanipriyangika]

This method is so much easier than other methods... really helped me... Thank u very much

[darshan.b]

Bro u just saved me more time in finding value of d bro, , Thank you so much❤

[kingorigathungo]

Thank you so much for this simplified method

[khalidking]

thank youuuu, you helped me a ; i have an exame in cryptographie after tomorrow

[imanariyobaptiste]

and atleast i subscribed for my first time thanks

[CheyziEdits]

Thank you, that was very easy and understandable

[SoWasRed]

Oh my god...this is so easy. Thank u bai

[imanariyobaptiste]

the genius always deserves the best blessing from God dad you rescued my mind Dad

[aartiyadav]

Thank u sir 👍 it really helped alot...

[HillmountHeights]

Bro awesome …..it was the easiest step 😍

[franklinrufus]

Bro what about bigger numbers like 121 and 151....?

[papisway]

Your last step is not clearly understood. How is d= 3 where (21 x d) = 3 mod 20?

[thorbjrnjariikkala]

Is there a formula to make it easier with big numbers?

[MayurShinde-rclj]

Sum 1,
If equation will be multiple by 27
Isn't it will be 81× 27d ?

[ashwinbharambe]

rsa algorithm n=221 and e=5 find d can you give me solution of this

[coxandrewj]

Not really practical with big numbers.

[rithsinawatra]

This method is not always working, try dx8 = mod 60.

[minu]

Sir can you please teach how the public key (e) is calculated when private key (d) is given in the question

[philbutthead]

What do I do if my d value is negative?

[mahdinouira]

it don't work when in this example
n = 119
fi(n) 96
e = 5