An offline private key is a cryptographic key that is not stored on a network-connected medium. The key can be used to decrypt archive or backup data.
The key can be the result of an offline private key protocol. In printed form the key can be a trusted paper key.
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Offline private key protocol — The offline private key protocol (OPKP) is a cryptographic protocol to prevent unauthorized access to back up or archive data. The protocol results in a public key that can be used to encrypt data and an offline private key that can later be used … Wikipedia
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Trusted paper key — A trusted paper key (TPK) is a machine readable print of a cryptographic key. The printed key can be used to decrypt data, e.g. archives or backup data. A trusted paper key can be the result of an offline private key protocol.The paper printed… … Wikipedia
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