| 摘要 |
A system for secure transfer of encrypted data involves a sender client ( 36 ), a recipient client ( 38 ), a main server ( 40 ), and a key server ( 42 ). The sender client ( 36 ) receives instructions from a first user identifying transfer data and a recipient identifier, creates an encoding key, encodes the transfer data using the key, and communicates the key and the recipient identifier to a main server ( 40 ). The main server ( 40 ) communicates the key and the recipient identifier to the key server ( 42 ), which associates the recipient identifier with a secure package identifier and communicates the secure package identifier to the main server ( 40 ), which communicates the secure package identifier to the sender client ( 36 ). The recipient client ( 38 ) receives and identifies the secure package identifier and the encoded transfer data, receives from a second user a user identifier, and communicates the user identifier and the secure package identifier to the main server ( 40 ), which communicates them to the key server ( 42 ). The key server ( 42 ) communicates the key to the main server ( 40 ) only if the secure package identifier received from the recipient client ( 38 ) matches the secure package identifier created by the main server ( 40 ) and if the user identifier matches the recipient identifier. The main server ( 40 ) communicates the key to the recipient client ( 38 ).
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