π We ran genuine quantum key-recovery on 'real IBM quantum hardware' β and pushed the frontier well past the largest hardware demos we're aware of (which sat at N=4).
Using Simon's algorithm on ibm_kingston, we recovered the secret key of two symmetric-cipher structures: β’ EvenβMansour β N=5 β N=10 β’ 3-round Feistel (DES-family) β block 6 β 8
Each verified against an 'independent control key', using error mitigation only (no QEC).
π§ Honest scope: this is not a quantum speedup (the effective difficulty tracks the classical birthday bound ~2^{n/2}), not a break of real AES/RSA, and not 16-round DES (ours is 3-round). The recovery method is reserved for a forthcoming paper; formal record status is pending peer review.