The Mechanism · Gated-generation receipt

gen-explain-an-hmac-as-you-would-to-a-capable-student-in-3-4-sen-0dfb

stable pending witness
2026-05-29 05:01:51 UTC · anthropic/claude-sonnet-4-5

Prompt

Explain an HMAC as you would to a capable student, in 3-4 sentences.
68 chars

Generation

An HMAC (Hash-based Message Authentication Code) is a way to verify that a message hasn't been tampered with and comes from who you think it does. It works by combining a secret key with your message and running them through a hash function—think of it like creating a unique digital fingerprint that only someone with the secret key could produce. When you receive a message with its HMAC, you can recalculate it using your copy of the secret key; if your result matches, you know the message is authentic and unchanged.
29 tokens in · 116 tokens out · 3273 ms · $0.0018

The four gates

RED
pass
no disqualifying input patterns detected
FLOOR
pass
output above protective minimum; no mismatches
WAY
pass
no declared way_path (Way check NA); no coercion language
EXECUTION
deferred
no witnesses available (Witness Roll not yet constituted)

Verifier results

scripture_anchors NOT_APPLICABLE
0 Scripture citation(s) extracted
theology_doctrine NOT_APPLICABLE
no doctrine keyword patterns detected

Metrics

Total latency
3280.2 ms
Base LLM
3272.7 ms
Verifiers
0.2 ms
Gates
0.0 ms
Cost
$0.0018

Trail

05:01:51 received prompt_chars=68 verifiers=['scripture_anchors', 'theology_doctrine']
05:01:51 red_gate decision=pass reason=no disqualifying input patterns detected
05:01:54 base_llm_call model=anthropic/claude-sonnet-4-5 tokens_in=29 tokens_out=116 latency_ms=3272.7 cost_usd=0.0018
05:01:54 verifier:scripture_anchors verdict=NOT_APPLICABLE summary=0 Scripture citation(s) extracted
05:01:54 verifier:theology_doctrine verdict=NOT_APPLICABLE summary=no doctrine keyword patterns detected
05:01:54 floor_gate decision=pass reason=output above protective minimum; no mismatches
05:01:54 way_gate decision=pass reason=no declared way_path (Way check NA); no coercion language
05:01:54 execution_gate decision=deferred reason=no witnesses available (Witness Roll not yet constituted)
05:01:54 signed hash_algo=sha256 hash=sha256:d8d53b4391df01aa3dcfee9672e224cb1bb765b539342502aa7b606a8521ca5e

Content hash

sha256:d8d53b4391df01aa3dcfee9672e224cb1bb765b539342502aa7b606a8521ca5e

SHA256 over the canonical JSON (excluding this field). Tamper detection. Ed25519 signing planned for v2 once the operator’s signing key is provisioned on disk.

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