Espresso vWii ancast key
2EFE8ABCEDBB7BAAE3C0ED92FA29F866

Found in the Espresso’s key fuses/OTP. Used to decrypt the vWii System Menu and the new NANDloader binaries (1-512 and 1-513) at load time. Disabled by the boot ROM until reset.

Espresso Wii U ancast key
805E6285CD487DE0FAFFAA65A6985E17

Found in the Espresso’s key fuses/OTP. Used to decrypt the Cafe OS kernel at load time. Disabled by the boot ROM until reset.

Wii U common key
D7B00402659BA2ABD2CB0DB27FA2B656

Found in the Starbuck’s OTP. Used to decrypt the specific title key for every Wii U application (this is done at installation time for system firmware and installable titles, and at load time for disc games). Note that Cafe OS and Starbuck binaries are double-encrypted with their own ancast keys too.

vWii common key
30BFC76E7C19AFBB23163330CED7C28D

Found in the Starbuck’s OTP. Used to decrypt the specific title key for vWii system updates (since the key is only needed at installation time, vWii mode doesn’t actually have access to it). Note that the System Menu and NANDloaders are double-encrypted with the vWii ancast key too.

Wii U ancast key
B5D8AB06ED7F6CFC529F2CE1B4EA32FD

Found in the Starbuck’s OTP. Used to decrypt Starbuck binaries (Wii U IOS and cafe2wii). Unlike the Espresso keys, this one is enabled forever (except in vWii mode, of course), as the Starbuck boot0 really only runs at boot time, and Starbuck ancast binaries are simply parsed and decrypted by IOS itself when reloading.