The first server further stores a double encryption key obtained by encrypting the third encryption key and the second encryption key.
The second encrypting key is different from said first encrypting key.
The file encryption key is encrypted with a directory encryption key to produce an encrypted file encryption key.
A decrypting/encrypting part (25) is provided which uses an encryption key (Kw) received by a data receiving part (21) to decrypt an encryption key (Ks) and also uses an encryption key (Kw2) to encrypt the encryption key (Ks).
The destination printer includes a private encryption key which corresponds to the public encryption key.
By using this encryption key, data to be transmitted is encrypted according to the stream encryption.
In this case, the key management server (1) unilaterally broadcasts encryption key data obtained by encrypting the encryption key using a device public key that is the public key of a destination terminal.
This can realize a compatibility between an encryption double key system used as a first encryption system and an encryption (single) key system used as a second encryption system.
The directory encryption key is encrypted with a public key of a user within a group to produce an encrypted directory encryption key.
The method further includes receiving the second encryption key and the seed by the software provider and decrypting the second encryption key using a private key to recover the first encryption key.
The key server may respond with a birth key encrypted key encryption key.
The generating the card credential includes encrypting the card key using a server encryption key.
Encrypting (325) the data (Di) for each encryption period (Ti) with a respective forward encryption key (GKFi) and a respective reverse encryption key (GKFi) is then performed.
The first server has a storage unit which stores double encryption information obtained by subjecting the information to double encryption using a first encryption key and a second encryption key.
Afterward, the first encryption key is shredded.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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