Oblivious Key Escrow


Published: Apr 05, 2000 Updated: Apr 05, 2000 Section: Network Security Library :: Auth. & Access Control Author: Company: Cambridge Protocols Workshop Printable Version Adjust font size: 1 2 3 4 5

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.

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