Normally, I'd ask highly specialised reverse engineering stuff such as this over on 4DSdev.org (which, in fact, I already did). Trying my luck here now, cause it has gotten fairly silent over there now. Recently, I've been trying to write a working parser for title databases (title.db, import.db, maybe even ticket.db). There is an entry for those on 3Dbrew.org: http://3dbrew.org/wiki/Title_Database Parsing the title.db and import.db from my N3DS (9.0.0) NAND, I've noticed something strange: Although the files are obviously okay (otherwise my console would be bricked), they look like they are corrupted in several parts. Parsing (as described on 3Dbrew.org) works for some Title Entry and Title Info tables, but for others, I just get garbage. Now, is it possible that just some parts of the files are encrypted? (I'm not talking about the standard CTRNAND encryption layer, of course). And, how to decrypt them, and how (if we'd rule out statistical analysis) to decide which parts are encrypted and which are not? Any ideas?