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Victor KuznetsovandClaude Opus 5.5 d800ec9455 Verify TC260 SecurityData label signatures against a pinned MiniMax key
MiniMax signs its TC260 label with SM3withSM2 per TC260-PG-202511A. A
verification-only SM3/SM2 (no dependency provides the SM2 curve) checks the
appendix A.1 label message; a signature under the pinned MiniMax key is a
high-confidence aigc_signature signal, a failing one is a caveat, and every
result is the aigc_signature metadata marker. Pinned by the GB/T 32905 SM3
vectors, OpenSSL's SM2 verify vectors and real MiniMax files. Over 411 local
files the only verdict-record change is the marker on nine MiniMax videos.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-30 15:36:08 -07:00
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