| 摘要 |
A method, machine-readable medium, and server to create a key, set an expiration event for the key to expire, send the key to a first client device to encrypt the document, authenticate a second client device that is in receipt of the encrypted document, delete the key if the expiration event has occurred, and send the key from to the authenticated second client device to decrypt the document if the expiration event has not yet occurred. For one embodiment, the key is used by client devices for encryption and decryption of the document only and is not otherwise accessible to the client devices. For one embodiment, the server facilitates sending the encrypted document to the second client device but does not retain a copy of the encrypted document.
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