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Abstract : |
We propose a simple scheme, based on secret-sharing over large-scale networks, for assuring recoverability of sensitive archived data (e.g., cryptographic keys). In our model anyone can request a copy of the archived data but it is very difficult to keep the existence of a request secret or to subvert the access policy of the data "owner. " We sketch an architecture for a distributed key escrow system that might be suitable for deployment over very large-scale networks such as the Internet. We also introduce a new cryptographic primitive, oblivious multicast, that can serve as the basis for such a system. 1, |
