基本信息:
- 专利标题： Method for protecting portable card
- 专利标题（中）：保护便携卡的方法
- 申请号：JP2005256078 申请日：2005-09-05
- 公开(公告)号：JP2005348453A 公开(公告)日：2005-12-15
- 发明人： MULLER FRANK , ROELOFSEN GERRIT
- 申请人： Nokia Corp , ノキア コーポレーション
- 专利权人： Nokia Corp,ノキア コーポレーション
- 当前专利权人： Nokia Corp,ノキア コーポレーション
- 优先权： NL1012581 1999-07-13
- 主分类号： B42D15/10
- IPC分类号： B42D15/10 ; G06F12/14 ; G06F21/06 ; G06K19/073 ; G09C1/00 ; H03K3/84 ; H04L9/10 ; H04L9/12 ; H04L9/26
摘要：
PROBLEM TO BE SOLVED: To provide a portable card that is resistant to DPA so as to be safely available.
SOLUTION: In a method for protecting a portable card, provided with at least an algorithm for enciphering data or authenticating the card, against the deriving of the secret key used from statistical analysis of its information leaking away to the outside world of the portable card in the event of cryptographic operations, such as power-consumption data, electromagnetic radiation and the like, the card is provided with at least a shift register having a linear and a non-linear feedback function for creating cryptographic algorithms. The method includes a step of loading data to be processed and a secret key to the shift register of the portable card and after the secret key has been loaded into the shift register, the shift register clocks on for a certain specific period of time, using at least the linear-feedback function.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要（中）：
SOLUTION: In a method for protecting a portable card, provided with at least an algorithm for enciphering data or authenticating the card, against the deriving of the secret key used from statistical analysis of its information leaking away to the outside world of the portable card in the event of cryptographic operations, such as power-consumption data, electromagnetic radiation and the like, the card is provided with at least a shift register having a linear and a non-linear feedback function for creating cryptographic algorithms. The method includes a step of loading data to be processed and a secret key to the shift register of the portable card and after the secret key has been loaded into the shift register, the shift register clocks on for a certain specific period of time, using at least the linear-feedback function.
COPYRIGHT: (C)2006,JPO&NCIPI
要解决的问题：提供耐DPA的便携式卡，以便安全可用。 解决方案：在一种用于保护便携式卡的方法中，至少提供了一种用于对数据进行加密或认证卡的算法，抵消了从泄漏到外部世界的信息的统计分析中使用的秘密密钥的导出。 在诸如功耗数据，电磁辐射等的密码操作的情况下，卡提供至少一个具有用于创建加密算法的线性和非线性反馈功能的移位寄存器。 该方法包括将要处理的数据和秘密密钥加载到便携式卡的移位寄存器的步骤，并且在秘密密钥已经被加载到移位寄存器之后，移位寄存器在一定的特定时间段内使用 至少线性反馈功能。 版权所有（C）2006，JPO＆NCIPI
信息查询:
EspacenetIPC结构图谱:
| B | 作业；运输 |
| --B42 | 装订；图册；文件夹；特种印刷品 |
| ----B42D | 书；书籍封皮；活页；不包含在其他类目中的特殊开本或形式的印刷品；与上述物品使用有关的装置；可动条带的记录或读出设备 |
| ------B42D15/00 | 其他类目不包含的特殊开本或类型的印刷品 |
| --------B42D15/10 | .身份证，信用证，支票或类似承载信息用的卡片 |