{"id":"digest-recomputed-on-preprepare","text":"Backup replicas independently recompute the SHA-256 digest from the request payload in every PRE_PREPARE message; they never trust the primary's claimed digest value","truth_value":"IN","source":"entries/2026/05/29/topic-byzantine-fault-tolerance.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"digest-recomputed-on-preprepare","truth_value":"IN","reason":"premise"}]}}