发明授权
- 专利标题: Method and apparatus for limiting number of times contents can be accessed using hash chain
- 专利标题(中): 使用哈希链可以访问内容的次数的方法和装置
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申请号: US11030560申请日: 2005-01-07
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公开(公告)号: US07788728B2公开(公告)日: 2010-08-31
- 发明人: Myung-sun Kim , Su-hyun Nam , Yong-jin Jang , Sun-nam Lee , Jae-heung Lee
- 申请人: Myung-sun Kim , Su-hyun Nam , Yong-jin Jang , Sun-nam Lee , Jae-heung Lee
- 申请人地址: KR Suwon-Si
- 专利权人: Samsung Electronics Co., Ltd.
- 当前专利权人: Samsung Electronics Co., Ltd.
- 当前专利权人地址: KR Suwon-Si
- 代理机构: Sughrue Mion, PLLC
- 优先权: KR10-2004-0001095 20040108
- 主分类号: G06F21/24
- IPC分类号: G06F21/24 ; H04L9/08
摘要:
A method and apparatus are provided for simply and securely limiting a number of times that contents can be accessed using a hash chain. The apparatus limiting a number of times contents are accessed by a user terminal includes a hash chain generator receiving information indicating selected contents by the user terminal and information indicating how many times (n) the user terminal has authority to access the selected contents and generating a hash chain including n hash values derived from a seed value, and a contents access manager deleting the hash values one by one from the hash chain whenever the user terminal accesses the selected contents such that the number of times the contents can be accessed by the user terminal is decreased by the number of deleted hash values.
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