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OPTIGA™ TPM Forum Discussions

KavitaJhajharia
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Hi Team,

 

I am researching on enhancing security. Is it possible to reprogram  OPTIGA TPM?

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Hi @KavitaJhajharia ,

TPM firmware is developed according to TCG (Trusted Computing Group) standard.

As an end user you can only use the APIs to perform certain functions on your host side computer or systems (like uC etc.) but you cannot modify the TPM firmware to implement your own crypto. 

Regards

Sharath

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snehapra
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25 likes received 100 sign-ins 25 solutions authored

Hi @KavitaJhajharia ,

Could you specify what you mean by "reprogram"? 

Applications use TPM functionality by calling its API and TPM can be firmware updated but cannot be programed.

Thanks,

Sneha

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Thanks Sneha,

I want to induce one more symmetric key encryption algorithm (lighter than AES) in TPM.

 

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Hi @KavitaJhajharia ,

TPM firmware is developed according to TCG (Trusted Computing Group) standard.

As an end user you can only use the APIs to perform certain functions on your host side computer or systems (like uC etc.) but you cannot modify the TPM firmware to implement your own crypto. 

Regards

Sharath

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Thanks Sharath,

Is there any way I can implement TPM either on FPGA, Raspberry pi or may be something else?

in https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7298&context=etd  TPM is implemented on FPGA. I am not getting the steps on how to implement it.

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TPM is more advanced and comes with secure HW. You can implement something that 'emulates' TPM in SW (say in Raspberry Pi etc.), but it is of course not as secure as TPM or any other HW based solution. TPM is also certified by Trusted Computing Group (TCG), so from a compliance perspective as well, the 'emulated' solution won't work. 

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Sure Sharath, I know it will not be a standard TPM. But I want to do some experiments with TPM (preferably H/W, although S/W also I can check). It will be nice if you can suggest me what and where should I search.

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Unfortunately TPM 'emulation' using publicly available materials is out of scope for this forum.

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Ok Sharath,

No problem, Thanks a ton.