发明名称 |
Method and apparatus for licensing computer programs using a DSA signature |
摘要 |
A method and apparatus for using a Digital Signature Algorithm (DSA) for providing licensing of software. Three steps are required to allow setting up a license, issuing a license and for customer update of the license. An initialization step generates a public and private key pair. A license generation step follows the initialization step and involves feeding the private key and data for the license terms through the DSA to create a digital signature. The digital signature hash value is distributed to the customer as a valid license. The customer performs license verification by running the signature, public key and data for the license through the DSA on the customer's machine.
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申请公布号 |
US6078909(A) |
申请公布日期 |
2000.06.20 |
申请号 |
US19970974379 |
申请日期 |
1997.11.19 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
KNUTSON, JAMES IRWIN |
分类号 |
G06F1/00;G06F21/00;(IPC1-7):G06F17/60 |
主分类号 |
G06F1/00 |
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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