发明授权
US07788728B2 Method and apparatus for limiting number of times contents can be accessed using hash chain 有权
使用哈希链可以访问内容的次数的方法和装置

Method and apparatus for limiting number of times contents can be accessed using hash chain
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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