发明名称 |
Electronic content delivery system |
摘要 |
Disclosed is a method and apparatus of securely providing data to a user's system. The data is encrypted so as to only be decryptable by a data decrypting key, the data decrypting key being encrypted using a first public key, and the encrypted data being accessible to the user's system, the method comprising the steps of: transferring the encrypted data decrypting key to a clearing house that possesses a first private key, which corresponds to the first public key; decrypting the data decrypting key using the first private key; re-encrypting the data decrypting key using a second public key; transferring the re-encrypted data decrypting key to the user's system, the user's system possessing a second private key, which corresponds to the second public key; and decrypting the re-encrypted data decrypting key using the second private key.
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申请公布号 |
US6226618(B1) |
申请公布日期 |
2001.05.01 |
申请号 |
US19980133519 |
申请日期 |
1998.08.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
DOWNS EDGAR;GRUSE GEORGE GREGORY;HURTADO MARCO M.;LEHMAN CHRISTOPHER T.;MILSTED KENNETH LOUIS;LOTSPIECH JEFFREY B. |
分类号 |
G06F21/24;G06F1/00;G06F21/00;G06Q10/00;G06Q30/00;G06Q50/00;G09C1/00;G10K15/02;H03M7/30;H04L9/08;H04L9/10;H04L29/06;H04L29/08;H04N7/167;H04N7/173;(IPC1-7):H04L9/00 |
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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