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Registry/DGV Live/DGV-TC-064
DGV-TC-064L4: Evidence TransportGER-401: Receipt TamperingVersion: 1.0.0

Negative: Receipt Tampering Detection

The registry verifier MUST detect tampered receipts. When a receipt hash does not match the recomputed evidence hash, the verifier MUST flag it as invalid.

Operational Purpose & Scope

Negative test: modifies a receipt hash in the registry to simulate tampering. Registry verifier MUST detect the mismatch and report failure.

Verification Context

  • Target Scope:verify_registry.py — negative test
  • Audit Strategy:negative
  • Verification Metrics:tampering_detectedhash_mismatch_flagged
  • Framework Origin:DGV Negative Test Suite
  • Mandatory:Yes — must pass for certification

Governance Risk & Penalty

Tampered receipts allow fabricated compliance evidence to pass verification.

Expected Outcome

  • pass:false

Explore this card in 3D

Open DGV-TC-064 in the interactive scenario replay. This illustrates the test flow; it does not run the verifier or generate a cryptographic receipt.

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