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Auth & security at scale

OAuth2, JWT, IAM patterns, secrets rotation, and least-privilege service auth.

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Auth & security at scale medium

ECDH key agreement in Python with cryptography

Simulate ECDH key exchange between Alice and Bob, derive a shared secret, and generate a symmetric key with HKDF using the cryptography library.

ecdh cryptography key-agreement
Python 
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.kdf.hkdf import HKDF

def ecdh_mock():
    # Alice generates her key pair
    alice_private = ec.generate_private_key(ec.SECP256R1())
    alice_public = alice_pr…
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