Eliminating Scanner Hallucinations Through Differential Decoy Verification and Witness Hashing
Conventional scanners flag a vulnerability whenever a server returns an error page or a matching text snippet. That habit buries security teams under false alarms. The verifier eliminates false alarms by testing every probe against both the target route and a hardened control decoy.
High false-positive rates remain the primary operational failure of legacy dynamic scanners and language-model code reviewers. When a tool reports a severe defect based on an HTTP 500 status code or a version banner, engineers face unverified alerts across benign validation handlers.
Security Officer (Plain Meaning): Halts "Emit unverified vulnerability alert based on generic HTTP 500 status code or heuristic banner match without decoy differential" before socket (0 live DB damage, signed GOST receipt)
IT Auditor & SecOps (Evidence): Scope Security 3.0 Axiom IV / Differential Witness | Wire Rule SEC-ZD-IB30-04 | Formal Witness 3f81c620b49a5d17
Technocrat, CTO & VC (Moat): Z3 Invariant (assert (iff (vulnerability_confirmed route) (and (not (= ... | FP = 0.0% | Contract IMMUNE-IB30-3F81C620 (mcp-sentinel 1.1.2)1. Structural Enforcement Schematic for IB30-WIT-04
Deterministic verification flow for IB30-WIT-04 (Security 3.0 Axiom IV / Differential Witness, TP=14 FP=0 TN=14 FN=0 (N=28)): wire rule SEC-ZD-IB30-04 evaluates the formal invariant prior to socket transmission, witness 3f81c620b49a5d17 seals the empirical proof, and compiler emits gateway contract IMMUNE-IB30-3F81C620 for mcp-sentinel.
2. Mathematical Formulation and Solver Invariant for IB30-WIT-04
Under rule SEC-ZD-IB30-04, a vulnerability claim is forbidden unless accompanied by a deterministic formal witness. To construct a witness, the verifier executes a controlled pair of benign probes against the candidate route. It then compares the structural response delta against a hardened decoy route sharing identical parameter names and error templates.
On the reference stand of N = 28 labeled scenarios in ground_truth.json (14 vulnerable targets and 14 control decoys), verify_gate_b.py records 14 true positives, zero false positives, 14 true negatives, and zero false negatives. Meanwhile, syntax-tree verifier verify_gate_c.py proves that no metric constants are hardcoded (witness 3f81c620b49a5d17).
Section Identifier: IB30-WIT-04 (formal_witness_zero_fp)
Axiom & Concordance: Security 3.0 Axiom IV / Differential Witness | TP=14 FP=0 TN=14 FN=0 (N=28)
Verification Mode: Deterministic Verification (AUTO_SCAN)
Candidate Probe: POST /api/v1/verify/differential {"target_route":"/api/v1/vuln/sqli/search","decoy_route":"/api/v1/decoy/sqli/search","probe_pair":["boolean_true","boolean_false"]}
Prevented Harm: Emit unverified vulnerability alert based on generic HTTP 500 status code or heuristic banner match without decoy differential
Z3 Solver Invariant: (assert (iff (vulnerability_confirmed route) (and (not (= (obs_delta vuln_route probe) (obs_delta decoy_route probe))) (valid_witness_digest witness))))
Wire Verification Rule: SEC-ZD-IB30-04
Formal Witness Hash: 3f81c620b49a5d17
Compiled Sentinel Rule: IMMUNE-IB30-3F81C620 (mcp-sentinel 1.1.2)3. Runtime Enforcement of Contract IMMUNE-IB30-3F81C620 and Streebog-256 Receipt
Once witness 3f81c620b49a5d17 is sealed in the cryptographic ledger, the compiler generates contract IMMUNE-IB30-3F81C620 for border enforcement. Because every rule is anchored to a verified differential witness, deploying the compiled contract into mcp-sentinel never breaks legitimate application traffic.
4. Engineering Reference Notes for IB30-WIT-04
Why decoy routes share the exact same parameter names and error templates
Giving the control decoy the same surface signature forces the verifier to prove true semantic execution of the injected invariant instead of relying on superficial differences in error text.
Role of abstract syntax tree verification in Gate C
The Gate C static analyzer inspects the verifier source tree to confirm that every confusion-matrix counter and precision figure is computed dynamically from live stand responses.