Web crypto exploitation — padding-oracle (Vaudenay), AES-CBC bit-flipping / IV manipulation, AES-ECB pattern attacks (cut-and-paste, prefix/suffix recovery), HMAC bypass, hash-length extension, JWT alg confusion. Covers detection signals, working in-file Python harnesses (concurrent.futures, timeout=5, python3 -u, bounded request budget), and the confirm-oracle gate that must fire before iteration.
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