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Zero Trust Service Auth Mock in Python

A simple HMAC-based token issuance and validation mock that enforces zero trust between microservices.

import hmac
import hashlib
import json
import time

class ZeroTrustAuth:
    def __init__(self, secret_key):
        self.secret_key = secret_key
        self.service_tokens = {}

    def issue_token(self, service_name, ttl=300):
        payload = {
            "service": service_name,
            "issued_at": int(tim…

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