feat(bench): CTX-0026 security & concurrency benchmark - #35
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…nown-cover/collusion/oracle/steganalysis/concurrent) - brute-force 128b: 0/5000 (FER 0.0, 2^-128), HMAC 0/1000 - known-cover diff: removal 1.0, residual FER 0.0 (correct K) / 1.0 (wrong K) - collusion median N=2..8: payload FER 1.0, secret survival 1.0 - verify-oracle: 74us verify (13.5k q/s), 4096 queries -> 68min at 1qps, binary + rate-limit - steganalysis: DCT AUC 0.47 TPR 0.01@0.01 stealthy, DWT AUC 0.985 detectable synthetic - concurrent consume: exactly min(max_uses,threads), median 4.2ms p95 11ms, idempotent Measured on DctCarrier/DwtCarrier with framing/ECC and TranslationRegistration residual. Bench: capglyph-cli/src/bin/security_bench.rs (28.8s), clippy clean, wasm check passes. Refs CTX-0026
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CTX-0026 Security & concurrency benchmark + paper draft section
Measured on DctCarrier/DwtCarrier with framing/ECC and TranslationRegistration residual.
Bench: src/bin/security_bench.rs (28.8s), clippy/wasm/test passes.
Docs: findings 2026-08-31-security-bench-CTX-0026.md + security-bench-results.json
Paper: § Security and Concurrency Evaluation (manuscript-ready, 2 tables)
Closes CTX-0026
Refs CTX-0023 DB, CTX-0025 ladder