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Danj
Joined: 15 May 2005
Posts: 70
Location: Peterlee, DURHAM, UK
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 Posted: Mon Jul 11, 2005 11:11 pm Post subject: Re: how about.. |
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| AuDioFreaK39 wrote: | | on the diagram listed above...is there a way to make the psp not go through the AES Encryption process, and go directly to everything else? |
This makes no sense. Why would you wish to remove the PSP's AES encryption module, all executables (except homebrew ones) are encrypted and so this would render the PSP unable to run anything.
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Dan Jackson |
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detonator
Joined: 20 Jul 2005
Posts: 1
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| Posted: Wed Jul 20, 2005 12:41 am Post subject: SPA crypto attack on PSP keys |
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Hi,
About the secret key(s) in the PSP:
While difficult in practice, It should be possible to apply attacks methods to retrieve the secret(s) keys values embedded in the PSP by using some techniques (SPA attacks), the same that are applied to smartcards by certification labs (before Visa / Mastercard / CC certification obtention).
It implies opening the PSP, connecting probes of a high sampling freq digital scope on the running PSP chip that provide cryptoalgorithms (main CPU? separate accelerator?), capturing several 1000's times the power consumption traces of this chip, determining the time when the crypto keys are used on data and max out this data through appropriate algorithms that discover the keys values.
... Well, at least this is in theory, it might be more difficult actually.. |
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Nick Fury
Joined: 22 Jun 2005
Posts: 45
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| Posted: Wed Jul 20, 2005 1:44 am Post subject: |
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| I seem to recall Darkfader doing something like that with the Nintendo DS. I wonder why no one has done it with the PSP yet. |
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pspkrazy
Joined: 04 Jul 2005
Posts: 49
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| Posted: Wed Jul 20, 2005 2:40 am Post subject: no secret keys |
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There are NO secret keys in the psp.
It is a non symetric algorithm that is used. |
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Arwin
Joined: 12 Jul 2005
Posts: 426
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| Posted: Wed Jul 20, 2005 10:36 pm Post subject: Re: how about.. |
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| Danj wrote: | | AuDioFreaK39 wrote: | | on the diagram listed above...is there a way to make the psp not go through the AES Encryption process, and go directly to everything else? |
This makes no sense. Why would you wish to remove the PSP's AES encryption module, all executables (except homebrew ones) are encrypted and so this would render the PSP unable to run anything. |
But if you made it switcheable ... |
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