| 发明名称 |
Program writable integrated circuit card and method therefore |
| 摘要 |
An IC card and a method thereof for adding or changing a program for a memory for writing without adversely affecting the function of the IC card and by keeping the security of a program to be written later by restricting writing by a write control program having a decryption function or a program code conversion function.
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| 申请公布号 |
US6732272(B1) |
申请公布日期 |
2004.05.04 |
| 申请号 |
US19970904137 |
申请日期 |
1997.07.31 |
| 申请人 |
HITACHI, LTD.;HITACHI VIDEO AND INFORMATION SYSTEM, INC. |
发明人 |
INOUE MASAYUKI;ITOH SHIGEYUKI;TAKAMI YUTAKA;MATSUMOTO KENJI |
| 分类号 |
G07G1/12;G06K17/00;G06K19/073;G07F7/10;(IPC1-7):H04L9/00;G06F12/14 |
主分类号 |
G07G1/12 |
| 代理机构 |
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