发明名称 |
RE-ENCRYPTION KEY GENERATOR, RE-ENCRYPTION DEVICE, ENCRYPTION DEVICE, DECRYPTION DEVICE, AND PROGRAM |
摘要 |
<p>A re-encryption key generator according to an embodiment generates a re-encryption key to obtain re-encrypted data that can be decrypted by a second private key of a second user device by re-encrypting ciphertext obtained by encrypting plaintext by a first public key of a first user device without decryption. The re-encryption key generator stores a first private key corresponding to the first public key. The re-encryption key generator stores a second re-encryption key generation key of the second user device that is different from a second public key corresponding to the second private key. The re-encryption key generator generates the re-encryption key based on the first private key and the second re-encryption key generation key.</p> |
申请公布号 |
SG11201500786U(A) |
申请公布日期 |
2015.05.28 |
申请号 |
SG11201500786U |
申请日期 |
2013.08.08 |
申请人 |
KABUSHIKI KAISHA TOSHIBA;TOSHIBA SOLUTIONS CORPORATION |
发明人 |
FUJII, YOSHIHIRO;OKADA, KOJI;MATSUSHITA, TATSUYUKI;HAYASHI, RYOTARO |
分类号 |
H04L9/08;H04L9/14;H04L9/30 |
主分类号 |
H04L9/08 |
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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