| 摘要 |
A method of passing data securely from an originator to a recipient comprises the steps of: the originator selecting a condition that the recipient must meet for receipt of the data; the originator selecting a trusted party; the originator selecting a first key without reference to the condition; the originator encrypting the data using the first key; the originator making the condition, and the encrypted data available to the recipient; the recipient providing the trusted party with evidence that it meets the condition; the trusted party satisfying itself that the recipient does meet the condition and providing the first key to the recipient, and the recipient decrypting the data using the first key. <IMAGE> |
