Entropy policies

A policy selects a quality guarantee. EMS records the chosen pool and actual contributors in the signed receipt.

Common policies

• quantum_verified: quantum sources with the strongest provenance.
• highest_quality: the best vetted QRNG mix and the SDK default.
• fastest_available: the lowest-latency eligible pool.
• cost_optimized: the least expensive eligible pool.

Specialized policies

• hybrid_mix: blend across tiers.
• failover: use an explicitly configured fallback.
• local_only: use local hardware with no network source.
• qispace_native: route through QiSpace TQRND.
• demo_mode: deterministic integration testing only.

Example

from lightrider import EntropyClient, Policy

with EntropyClient("https://ems.lightriderinc.com", api_key="lr_...") as client:
    client.fetch_verifier()
    response = client.get_bytes(32, policy=Policy.QUANTUM_VERIFIED)

If the required pool is unavailable, EMS refuses the request. Choose a weaker fallback in application code only when your security policy permits it.