ECDH (Elliptic Curve Diffie Hellman) with X25519

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Excuse me for sometimes not saying the full wording for "2" ,"5", "5", "1", "9".

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I just found your website! Thank you so much!

kebman
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Glad to see that you're well Bill. X

yeahweburnstuff
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what is the difference between 25519 and x25519

jnicholas
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hey I want to implement the Montgomery's ladder algorithm using python, to do point multiplication, I successfully managed to do that but when I tried to do scalar arithmetic on Curve255519, as p =2^255 - 19, my code failed to give right output, I tried to calculate 21130179955454(G), where G is base point with x coordinate 9 and z = 1, curve : y^2 = x^3 + 486662x^2 +x : p = 2^255 -19
I'm currently trying to learn the theory and algorithms involved in elliptic and hyper elliptic curve cryptography by myself, using as much as information I could find online like research papers, books youtube videos etc.
Can you help me out

skullcraver
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