And this is all joined together into a page where an X25519 key exchange for TLS is explained: «Hands-on: X25519 Key Exchange: Let's exchange a secret to start a secure conversation.»
Excellent stuff anyone interested in #TLS and/or #ECC should always have handy. Wow!
6/6
#X25519 #KeyExchange #Curve25519
https://x25519.xargs.org/
Native support for ed25519/x25519 in the browser would be a huge step forward for in-browser/client-side cryptography.
Looks like Google is holding up our ability to use it in production.
(Firefox and Safari both have support enabled by default.)
It’s 2023 and you’re designing a decentralised system based on public-key cryptography where a person’s identity(ies) are their public key(s).
Do you…
Implementing Curve25519/X25519: A Tutorial on Elliptic Curve Cryptography by @martin
A very accessible text; highly recommended if you want to understand the concepts underpinning the encryption used in TLS, Signal, etc.
Starts at modular arithmetic and covers Diffie-Hellman key exchange with clear explanations of cyclic groups and finite field and elliptic curve arithmetic within the context of the Montgomery curve used in Curve25519.
Funny when you think I was hanging out with Daniel ages ago without a clue who he was or what he’d done.
And to think how important his work is to the Small Web (and to privacy in general in the digital and networked age)…
PS. He also happens to be a lovely, humble guy and a very engaging and funny presenter. You can do far worse than to watch his talk from the conference we met at:
https://projectbullrun.org/surveillance/2015/video-2015.html
