| 摘要 |
A method and system for coordinating transmission between a sender and a recipient. In one embodiment, a third party coordinates the distribution of session keys (e.g., symmetric keys) for sender and recipient. A sender computer may generate a session key, encrypt it using a public key of the recipient, and send the encrypted session key to the third party. The third party then forwards the session key to the recipient computer. Upon receiving the session key, the recipient computer decrypts the session key so that the sender and recipient can communicate using a message encrypted with the session key.
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