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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

How to Create and Verify HMAC SHA256 API Signatures in Python

Generate and verify HMAC-SHA256 signatures for API requests using Python's hmac, hashlib, and base64 modules.

hmac sha256 authentication
Python 
import hmac
import hashlib
import base64
import json
from datetime import datetime, timezone

def create_api_signature(secret_key: str, method: str, path: str, timestamp: str, body: dict = None) -> str:
    """Create HMAC-SHA256 signature for API request."""
    payload = {
        "method": method.upper(),
        "p…
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