[cryptography] Homomorphic split-key encryption OR snake oil crypto

Ali, Saqib docbook.xml at gmail.com
Sun Feb 19 12:34:05 EST 2012


Hi Florian,

If the system involves split key / shared secrets (m of n), then it
wouldn't be a homomorphic system. Would it?

Saqib

On Sun, Feb 19, 2012 at 8:08 AM, Florian Weimer <fw at deneb.enyo.de> wrote:
> * Saqib Ali:
>
>> Can somebody explain me how this so-called Homomorphic split-key
>> encryption works?
>
> Isn't this just a protocal which performs a cryptographic primitive
> using split key material, without actually recombining the keys?
> (Traditional Shamir secret sharing needs a trust party for key
> recombination.)
>
> If yes, you might want to look for "RSA Threshold Cryptography" and
> similar work.
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