On Wed, Sep 19, 2012 at 2:08 PM, The Fungi <[email protected]> wrote: > ... > And how does the trustee get access to the encrypted form of the > secret?
presumably you get it to him "securely".[0] >... If he has a copy of it encrypted with the old key, how do > you ensure he throws it out when you reencrypt with the new key? the only mechanism i have considered that might fit this bill is a private key represented with coding redundancy across a molecule or crystal containing radioactive isotopes with a very short half life in the chemical bonds comprising the information in the structure. as the isotope decays, the bonds break, the information withers. if you lose enough you can no longer obtain the private key from the physical storage. note that this conveniently ignores attacks against partial key space that might be recovered via the remaining structures, even if a full reconstitution isn't directly possible. [1] i can't even imagine how expensive such a thing would be to make and manage... but one day we'll have matter compilers, right? 0. secure key management is left as an exercise to the reader. ;P 1. recent research indicates a remote denial of service via neutrino beams might be a risk factor for availability. _______________________________________________ cryptography mailing list [email protected] http://lists.randombit.net/mailman/listinfo/cryptography
