| 摘要 |
In a method for generating/regenerating an encryption key for a cryptographic method, the encryption key, as well as a public key being generated using a predefined deterministic method, from a large random number (seed), the seed is only generated on the user side, in that quantities known only to the user are consulted. Regeneration information (R), which is suitable for regenerating the seed and from which the seed is able to be derived deterministically by the trust center by linking only to information known to it, is generated on the user side and is stored so as to be secured against lost. In the event of loss of the encryption key, the seed is reconstructed by the trust center by linking the regeneration information to the secret information.
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