Tagkey-exchange
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Demystifying Cryptography
A Crypto 101 tour for the curious: what cryptography is, its goals, the anatomy of a secure connection, and the intuition behind Diffie-Hellman key exchange (with a live interactive demo of two parties agreeing on a shared key over an open wire) and the Caesar cipher.
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Introduction to Supersingular Isogeny Diffie-Hellman
An approachable introduction to Supersingular Isogeny Diffie-Hellman (SIDH) — one of the few post-quantum key exchanges built on elliptic curves — written for an Elliptic Curve Cryptography course: its motivation, the math you need (isogenies, the j-invariant, supersingular curves), the key exchange itself, and Costello et al.'s recommended parameters. Rebuilt from the original LaTeX, led in by the post's own blurb.
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