Files
magicka-vm/crates/attestation/Cargo.toml
T
linus-dandClaude Opus 4.8 bea076df43 Finding 4: full-trace evidence — reconstructed and re-derived, not summarized
Removes the deferral. Each sampled execution's FULL trace (every graph edge,
count, weight) and delta are persisted as evidence; the independent attestor
reconstructs them, recomputes the canonical trace hash and delta hash, re-derives
the replay-record leaf, and confirms it is among the retained Merkle leaves the
root is built from. The behavior-fingerprint hash is re-derived from features
(not trusted), and f64 divergence is stored bit-exact for an identical hash.

- trace_model: ExecutionTrace::serialize/deserialize (round-trips canonical_hash;
  total on garbage). Test: full_trace_serialize_roundtrips_canonical_hash.
- world_model: WorldDelta::serialize/deserialize (round-trips hash).
- ci_reports: retains TRACE_EVIDENCE_SAMPLE full traces; writes
  evidence/traces.tsv.
- attestation: depends on trace_model/world_model; reconstructs each trace,
  recomputes the leaf, requires it to match the claimed leaf AND be a retained
  leaf. Negative control: tampered_trace_breaks_attestation (corrupting the full
  trace, leaving the claimed leaf, fails attestation).
- merge-gates: requires evidence/traces.tsv; the separate attest step verifies it.

End-to-end (fast profile): 256/256 full traces reconstructed and re-derived to
retained leaves; recomputed root matches the claim over 6600 leaves.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-21 21:22:55 -07:00

18 lines
554 B
TOML

[package]
name = "attestation"
version.workspace = true
edition.workspace = true
license.workspace = true
[[bin]]
name = "attest"
path = "src/main.rs"
[dependencies]
# NOT ci_reports. The root, the full-trace hashes, and the leaves are recomputed
# by this crate's own code path — an independent check, not a re-export of the
# producer's claim. trace_model/world_model provide the shared trace/delta types
# and hashing the verifier reconstructs from raw evidence.
world_model = { path = "../world_model" }
trace_model = { path = "../trace_model" }