The Urahara Filter System
One of the first tasks that Kisuke was set by Yoruichi upon arrival on the S.S. Thor was to come up with a failsafe encryption to filter certain entries to certain people. He has now done this, and has set up six separate filters. They are as follows:
GRINGO filter: The blanket filter for everyone deemed an ally as stipulated by Yoruichi. More can and will be added as alliances are formed, provided a majority approve of the proposed individual's inclusion. As of now, the list stands at: Urahara Kisuke, Shihouin Yoruichi, Ukitake Jyuushirou, Suì-Fēng, Abarai Renji, Madarame Ikkaku, Ayasegawa Yumichika, Inoue Orihime, Kuchiki Byakuya, Kuchiki Rukia, Kamina, Ran Fan, Aragaki Shinjiro.
ALFRED filter: Shinigami only filter.
PAPYRUS filter: A private filter, which can be used to filter one on one conversations.
DIANA filter: One on one filter between Kisuke and Roy Mustang to be used for Operation Miki (aka. Gin Watch). Will be extended to cover those who will also be recruited. **NO LONGER ACTIVELY IN USE BY STILL UNHACKABLE**
BLACK HAYATE filter: Personal private filter for Riza Hawkeye and Roy Mustang. Because Kisuke ships them. Like the rest of the known universe. **NO LONGER IN ACTIVELY USE BUT STILL UNHACKABLE**
BLUES filter: Abarai Renji's personal private filter screening all beneath it from the watchful eyes of Kuchiki Byakuya
GINNOSUKEM filter: Kisuke and Yoruichi's personal, private filter, keeping all their inappropriate behaviour away from Suì-Fēng prying eyes.
These filters are pretty much unhackable- the only way they could be broken would be if the hacker was from a more technologically advanced era (e.g. an Autobot etc) or if they were an equally warped mad scientist type. Even so, trying to break it would not be easy. Anyone who DOES try will find their hacking device suddenly playing this particular song.
Kisuke will very likely be happy to devise other filters if he a) likes a person enough, b) thinks there's a need for it, or c) will be paid enough to do it- his bff has an insatiable appetite after all and it costs a lot to feed her.
As it's likely that more filters may be needed in the future, I'll try to keep this page up to date as well as I am able!