| 摘要 |
A protocol that allows customers to buy database records while remaining fully anonymous, i.e. the database server does not learn who purchases a record, and cannot link purchases by the same customer; the database server does not learn which record is being purchased, nor the price of the record that is being purchased; the customer can only obtain a single record per purchase, and cannot spend more than his account balance; the database server does not learn the customer's remaining balance. In the protocol customers keep track of their own balances, rather than leaving this to the database server. The protocol allows customers to anonymously recharge their balances. |
