Resource-match the OMA reference in the key-length sweep (oma_ser_keylen), which gives it the L/16 combining gain the longer frame allows. The proposal now passes a resource-matched OMA by 1.27x at L=64 rather than the 4.3x reported against a fixed-d reference. Densify the JSR, sensitivity, and brute-force grids so the curves are smooth, give the index cipher its channel floor instead of error-free reception, and add the permutation-key known-plaintext attack (exp_permkpa) so Fig. 7 carries a conventional linear scheme. Add check_cov_attack.py and check_cov_ceiling.py: a referee raised a ciphertext-only second-order attack; the exact-population test shows the received covariance leaks only a sparse rank-deficient subset of the key Gram and leaves the eavesdropper at the random-guess level. Dump verify_math.csv, move the superseded V=256 pilot CSVs to data/pilot.
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| 1 | jsr_db | blind | matched | perm_blind | oma_targeted |
|---|---|---|---|---|---|
| 2 | -10 | 0.4691233333 | 0.7203966667 | 0.4694833333 | 0.6401244609 |
| 3 | -8 | 0.52954 | 0.7906333333 | 0.5275833333 | 0.7152454705 |
| 4 | -6 | 0.5965433333 | 0.8503566667 | 0.59758 | 0.7840240868 |
| 5 | -4 | 0.6703433333 | 0.8956333333 | 0.6699733333 | 0.8424432091 |
| 6 | -2 | 0.7420833333 | 0.9283666667 | 0.7431533333 | 0.8888838836 |
| 7 | 0 | 0.8070433333 | 0.9532066667 | 0.8059933333 | 0.9237966241 |
| 8 | 2 | 0.8593066667 | 0.96942 | 0.85862 | 0.9488822017 |
| 9 | 4 | 0.9014266667 | 0.9805533333 | 0.9025733333 | 0.9662811712 |
| 10 | 6 | 0.9327633333 | 0.9872533333 | 0.9318466667 | 0.9780307416 |
| 11 | 8 | 0.9549433333 | 0.9917766667 | 0.9550866667 | 0.9858109157 |
| 12 | 10 | 0.9699833333 | 0.99508 | 0.9707366667 | 0.9908905586 |
| 13 | 12 | 0.98118 | 0.9966966667 | 0.9804366667 | 0.9941743502 |
| 14 | 14 | 0.9872866667 | 0.9979833333 | 0.9879066667 | 0.9962827887 |
| 15 | 16 | 0.9922966667 | 0.99871 | 0.9921133333 | 0.9976304229 |
| 16 | 18 | 0.9948766667 | 0.9992 | 0.99484 | 0.9984893291 |
| 17 | 20 | 0.99685 | 0.9994833333 | 0.9969366667 | 0.9990359654 |