Wii security
The Wii has four basic ways of communicating with the environment -- games on DVDs, savegames on SD card, channels/VCs on SD card and updates downloaded from Internet. All of them needs to be protected, for the Wii security model to hold up integrity. Different solutions are in place for all of the ways, even if there are similarities between them.
DVD discs
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Savegames on SD cards
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Channels on SD cards
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Internet updates
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