发明名称 |
Method for encryption backup and method for decryption restoration |
摘要 |
<p>A backup method which encrypts user data with an encryption/decryption key generated in an authenticated device; generates a reissue data processing key from a password and a device key in the authenticated device; generates reissue data by encrypting the encryption/decryption key with the generated key; furthermore, generates emergency reissue data by encrypting the password, an authority ID, and the like with an emergency reissue data processing key generated from an insurer key and a users organization key; and backs up the encrypted user data, the reissue data, and the emergency reissue data in a server.</p> |
申请公布号 |
EP1586973(A2) |
申请公布日期 |
2005.10.19 |
申请号 |
EP20050004078 |
申请日期 |
2005.02.24 |
申请人 |
HITACHI, LTD. |
发明人 |
KASAI, KAORI;TERAMURA, TAKESHI;SAITO, MOTONOBU |
分类号 |
G06F21/24;G06F1/00;G06F11/14;G06F12/00;G06F15/00;G06F21/00;G09C1/00;H04L9/32;(IPC1-7):G06F1/00 |
主分类号 |
G06F21/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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