[ExI] The second step towards immortality

[Martin Sustrik]

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On 02/01/14 21:07, Adrian Tymes wrote:
> On Jan 2, 2014 11:09 AM, "Martin Sustrik" <sustrik at 250bpm.com>
> wrote:
>> In short, the program would be fully encrypted (including the
>> private key is uses for Bitcoin transactions) and evaluated in
>> its encrypted form. It would never be decrypted.
> 
> Then how does it get run?  At some point, in some layer of the
> memory space, it needs to be decrypted in order to execute.

No. That's the point of homomorphic encryption. Take homomorphic
multiplication: E(a.b) = E(a).E(b)

You multiply two encrypted values and you get encrypted result. Still,
you have no idea about values of a, b or the result itself.

> For example, let us take a program that opens a socket to port 80
> on another machine.  At some point, the program will actually have
> in memory the values for 80 and the other machine's address -
> either IP or DNS.  The emulator can recognize this and write what
> those to a file, then play memory values back in time until the
> keys are found.

Won't work. The key was never in memory in decrpyted form.

Martin

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