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1. 发明授权

EP1284469B1 IC CARD 有权
标题翻译： IC卡
公开(公告)号：EP1284469B1
公开(公告)日：2009-07-15
申请号：EP01932158.7
申请日：2001-05-21
申请人： Panasonic Corporation
发明人： YOSHIMOTO, Tetsuro , KATSURA, Joji , NAKASHIMA, Shota , YAMAMOTO, Takeshi , MIZUSHIMA, Miki , ITO, Rie
IPC分类号： G06K19/07
CPC分类号： G06K7/0008 , G06K19/0723
摘要： A state control circuit (107) supplies an inactive state control signal (S2) to a CPU (105) and supplies an active state control signal (S3) to a data transfer circuit (102). In response, the CPU (105) becomes inactive, and the data transfer circuit (102) becomes ready to receive. On completing reception, the state control circuit (107) supplies an active state control signal (S2) to the CPU (105), which in response becomes active. The CPU (105) supplies a command signal (CMD2) to the state control circuit (107). The state control circuit (107) supplies an inactive state control signal (S3) to the data transfer circuit (102), which in response becomes inactive.
摘要翻译：状态控制电路（107）将无效状态控制信号（S2）提供给CPU（105），并将有效状态控制信号（S3）提供给数据传送电路（102）。作为响应，CPU（105）变为不活动状态，并且数据传送电路（102）准备好接收。在完成接收时，状态控制电路（107）将激活状态控制信号（S2）提供给CPU（105），该CPU响应变为激活状态。 CPU（105）向状态控制电路（107）提供命令信号（CMD2）。状态控制电路（107）向数据传输电路（102）提供无效状态控制信号（S3），其作为响应变为无效。

2. 发明公开

EP2081316A1 CRYPTOGRAPHIC CALCULATION PROCESSING CIRCUIT 审中-公开
标题翻译：密码计算处理电路
公开(公告)号：EP2081316A1
公开(公告)日：2009-07-22
申请号：EP07767167.5
申请日：2007-06-19
申请人： Panasonic Corporation
发明人： YOSHIMOTO, Tetsuro , TANAKA, Takayuki
IPC分类号： H04L9/06
CPC分类号： G06F21/75 , G06F7/38 , G06F9/30003 , G06F9/30007 , G06F9/3836 , G06F21/72 , G06F2207/7219 , G06F2207/7257 , H04L9/003 , H04L2209/08 , H04L2209/12
摘要： A dummy operation instruction circuit (100) is provided for issuing a dummy operation instruction (113) to a cryptographic control circuit (101) instead of a CPU (109) or the like after being notified of execution of a cryptographic operation instruction (111) from the CPU (109) or the like. By causing operation resources (103 to 108), such as a memory, an operator, a register and the like, after the execution of the cryptographic operation instruction (111), though they are normally inactivated for that period, so that a current is consumed, it is difficult to identify timing of the end, start and the like of a cryptographic operation process based on the magnitude of a consumed current. The dummy operation instruction (113) is issued only for a period of time for which the cryptographic operation instruction (111) is not issued from the CPU (109) or the like. Therefore, the performance of the cryptographic operation process is not deteriorated.
摘要翻译：虚拟操作指令电路（100）被提供用于在被通知执行密码操作指令（111）之后向虚拟操作指令（113）而不是CPU（109）等发送到密码控制电路（101）来自CPU（109）等。通过在密码运算指令（111）的执行后使存储器，操作员，寄存器等运算资源（103〜108）正常地在该期间停止，从而电流成为消耗的情况下，难以基于消耗电流的大小来确定密码运算处理的结束时刻，开始时刻等。虚拟操作指令（113）仅在未从CPU（109）等发出密码操作指令（111）的时间段发布。因此，密码操作过程的性能不会恶化。

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