次の点はほぼ事実として確定しました。
- BLACKCAS カードは HW は通常の B-CAS をそのまま流用している
- BLACKCAS カードは契約期限等を改変した EMM を作成し、B-CAS カードに与えることで作成されている
- BLACKCAS の中の人は Km/Kw/EMM アルゴリズム/ECM アルゴリズムを完全に把握している
現時点で推定として残っているのはどのようにして各カードに固有の Km を割り出したかの部分ですが、これまでのところ 2ch BLACKCAS 関連スレッドで報告されたものが M002 に限定されていることから、ID -> Km のアルゴリズムまではまだ漏れていないのではないかと考えています。
“
| — | Diary 2012-2 (via otsune) |
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