发明名称 |
Method and arrangement for ciphering information transfer |
摘要 |
The invention relates to a method and arrangement for ciphering an information transfer connection. The invention can be advantageously applied in a TDMA (Time Division Multiple Access) cellular system offering broadband circuit switched services. An essential idea of the invention is that the information to be ciphered in a transmission burst is divided into at least two blocks (730) and said blocks are ciphered in ways that are not identical with each other (750 to 770). Then the reliability of ciphering is better because the amount of information encoded using one and the same ciphering algorithm and key is smaller. In addition, the reliability of the ciphering can be varied by changing the number and/or size of the information blocks in a burst.
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申请公布号 |
US6813355(B1) |
申请公布日期 |
2004.11.02 |
申请号 |
US19990249475 |
申请日期 |
1999.02.12 |
申请人 |
NOKIA MOBILE PHONES LIMITED |
发明人 |
HAKASTE MARKUS |
分类号 |
H04L9/14;H04L9/06;H04L9/08;H04L9/12;H04Q7/38;(IPC1-7):H04K1/00 |
主分类号 |
H04L9/14 |
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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