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by Hibari222 at 8:20 PM EDT on August 23, 2017
Hi, who can help extract the key from this HCA file?
by datschge at 7:11 AM EDT on August 24, 2017
@Hibari222 - nobody, since the key is not stored within an encrypted file but inside the programs and data that then uses said encrypted files. You didn't bother writing what game you got that file from so nobody will ever be able to help you.
by Hibari222 at 8:32 AM EDT on August 24, 2017
@datschge - it's a pity :( Thank you.
by able1214 at 6:36 AM EDT on September 2, 2017
Is anyone able to help with decryption this file from cellphone game Magia Record just released on Aug 22?
https://mega.nz/#!9I5ikYiL!w2-v6FalIIv2IeWrJ9VSU00DSLwMAT3tcFJogM7Yihs
Much appreciated!
by kode54 at 8:59 PM EDT on September 2, 2017
Need the binaries from the game as well as the HCA files, since the keys are usually in the game code.
by able1214 at 9:35 PM EDT on September 2, 2017
@kode54

I uploaded the whole game package since I'm not sure which one is the binary...

https://mega.nz/#!0BoxHL7I!WG6puMzUma2nRWYSBhVXGFG_9zECWdfKKFKAn90uC5Y
by furrybob at 4:27 PM EDT on September 4, 2017
My incomplete HCA cracker says that the lowest byte of the key is 0x51. Might be useful if you're searching for it.
by earise at 12:32 PM EDT on September 5, 2017
@able1214
The key code is 0000000001395C51
by datschge at 2:21 PM EDT on September 5, 2017
@earise - Nice! I'll upload the complete set. Just curious, may I ask which file contained the key in the end? This hybrid app structure irritated me.
by able1214 at 2:43 PM EDT on September 5, 2017
@earise Thanks you very much for the help! I will give it a try right away.

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