Key Escrow And Its Application To Electronic Cash

In the domain of private communication, there are likely to be two contradictory requirements. On the one hand users want to communicate securely with other users, and on the other hand governments have requirements to intercept suspected user traffic. It is a main research objection to key escrow proposals how to meet the needs of both users and governments. The electronic cash systems, by incorporating the key escrow mechanism into, can realize traceability to suspected users?payment, while protecting the lawful users? privacy. The two aspects of key escrow and escrowed electronic cash system are studied and the main research results are as follows: ? Propose a key escrow system based on Rabin encryption algorithm. ? Propose a key escrow system based on Shaniir threshold scheme, and give two generalizations to this system. ? Propose a key escrow system based on Asmuth-Bloom threshold scheme. ? Propose a new secret sharing threshold scheme and a key escrow system based on it. ? Propose a key escrow system based on key distribution scheme. ? Propose a key escrow system based on RSA algorithm in a network environment. ? Propose a new electronic cash system based on cut-and-choose technique. ? Propose an escrowed electronic cash system based on Ferguson抯 electronic payment system. ? Propose an escrowed electronic cash system by smart card. ? Propose an escrowed electronic cash system by electronic wallet.