发明名称 |
Method and device for generating pseudorandom number, and method and device for encryption using pseudorandom number |
摘要 |
Provided are a method and apparatus for generating a pseudo-random number which is unpredictable and which has a small memory work area, and also a method and apparatus for encrypting data, for each predetermined amount, based on the generated pseudo-random number. A seed is divided into a predetermined number of blocks, new blocks are created by calculating an exclusive-OR of the blocks being different from each other, and the new blocks are merged to generate a new pseudo-random number. The data is encrypted for each determined amount based on the generated pseudo-random number. At this time, a pseudo-random number to be used for the succeeding encryption is generated by using as a seed a predetermined amount of random number of the pseudo-random number used for the preceding encryption of the predetermined amount of data.
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申请公布号 |
US8577038(B2) |
申请公布日期 |
2013.11.05 |
申请号 |
US20080670299 |
申请日期 |
2008.07.16 |
申请人 |
KAMEDA OSAMU;SATO MASAKAZU |
发明人 |
KAMEDA OSAMU;SATO MASAKAZU |
分类号 |
H04L9/22;G06F1/02;G06F7/00;G06F7/58;G06F12/14;G06F21/00;G10L19/18;H04K1/00;H04L9/06;H04L9/08;H04L9/18 |
主分类号 |
H04L9/22 |
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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