KiHoLee
057c555374
Derives each block key from the transformations that leave the decision statistic invariant: a global sign per frame entry, a relabeling of the frame entries applied to keys and codebook together, and a permutation of which user holds which row. The legitimate error rate is unchanged at 0.257 across 24 blocks while a refresh that installs fresh orthogonal keys reaches 0.710, and a key recovered by known plaintext returns to the random-guess level one block later.
193 B
193 B
| 1 | n_frames | ser_same_block | ser_next_block |
|---|---|---|---|
| 2 | 2 | 0.2777190625 | 0.998930625 |
| 3 | 4 | 0.2615640625 | 0.998644375 |
| 4 | 8 | 0.2594196875 | 0.998631875 |
| 5 | 16 | 0.2582471875 | 0.99867 |
| 6 | 32 | 0.2579625 | 0.99871875 |
| 7 | 64 | 0.257455 | 0.9987190625 |