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← All coursesWire Protocols & Applied Cryptography6 levels · 24 lessons

Base64 is not encryption, and it is not one-to-one~9 min
What TCP guarantees, and what it costs~9 min
Resolution is a protocol, not a lookup~9 min
Encoding, Transport and Name Resolution · Review~5 min

HTTP semantics vs the HTTP wire format~9 min
CORS is a browser rule, not a server rule~9 min
REST, gRPC, and the transport underneath~9 min
HTTP, CORS and API Protocols · Review~5 min

What a hash promises~7 min
AEAD or nothing: modes, nonces, reuse~7 min
You do not encrypt with RSA~7 min
Primitives You Choose, Not Build · Review~5 min

Signatures, and why they just got huge~8 min
Certificates are now a rotation problem~7 min
The operation that reaches your data is not the one you scheduled~7 min
Proving Who Sent a Message · Review~5 min

The handshake you stopped reading~8 min
What the edge may never cache: storage, reuse, and the key~7 min
Your socket reads OPEN after the server has stopped answering~7 min
The Handshake And The Edge · Review~5 min

JWT security under a size budget~8 min
Read one request end to end~7 min
Post-quantum, end to end~7 min
Tokens and the Post-Quantum Migration · Review~5 min

Course

Wire Protocols & Applied Cryptography

What happens on the network between two machines, and who can forge it.

Start free: Base64 is not encryption, and it is not one-to-one

The levels

Level I · 4 lessonsEncoding, Transport and Name Resolution