| 发明名称 |
Program writable IC card and method thereof |
| 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 |
US6938165(B2) |
申请公布日期 |
2005.08.30 |
| 申请号 |
US20010933801 |
申请日期 |
2001.08.22 |
| 申请人 |
HITACHI VIDEO AND INFORMATION SYSTEMS, INC. |
发明人 |
INOUE MASAYUKI;ITOH SHIGEYUKI;TAKAMI YUTAKA;MATSUMOTO KENJI |
| 分类号 |
G07F7/10;(IPC1-7):H04L9/32 |
主分类号 |
G07F7/10 |
| 代理机构 |
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