Importance

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Abstract

Certain embodiments of the present invention provide a method for replacing a cryptographic key including receiving a key replacement message for replacing the cryptographic key, decrypting at least part of the key replacement message using at least part of the cryptographic key, reading from the key replacement message at least part of at least a first replacement cryptographic key or at least a first replacement cryptographic key precursor value that is used to derive a first replacement cryptographic key, and replacing the cryptographic key with at least part of the first replacement cryptographic key. The key replacement message includes encrypted data. The encrypted data having been encrypted using at least part of at least a third cryptographic key. Decrypting the encrypted data using at least part of the cryptographic key. The decrypting being associated with verifying a digital signature.

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First Claim