| 摘要 |
A key server is configured to execute on a computer. The key server is further configured to programmatically respond to a request by a sender by generating a message identifier connected with a message to be communicated and a random shared key for encrypting the message by the sender if the sender has registered with the key server. The key server is yet further configured to programmatically respond to a receiver by extracting the random shared key for decrypting the message if the receiver has registered with the key server, the receiver provides the message identifier to the key server, and the receiver is an intended recipient of the message.
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