Title:
情報処理装置
Document Type and Number:
Japanese Patent JP4347582
Kind Code:
B2
Abstract:
An information processing apparatus comprising a secure information unit that is set to the state not requiring security in the case where the data is transferred from a user memory space to a general purpose register, and that is set to the state requiring security in the case where the data is transferred from a secure memory space to the general purpose register. An encryption key in the secure memory space is prevented from being stolen by prohibiting the data transfer to the user memory space from the general purpose register with the value of the secure information unit set to the state requiring security.
Inventors:
Hidenori Natsuki
Yoshioka Shiro
Kenichi Kawaguchi
Toshiya Kai
Shinichiro Fukai
Yoshioka Shiro
Kenichi Kawaguchi
Toshiya Kai
Shinichiro Fukai
Application Number:
JP2003026810A
Publication Date:
October 21, 2009
Filing Date:
February 04, 2003
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G06F21/60; G06F12/14; G06F21/10; G06F21/12; G06F21/14; G06F21/62; G06F21/74; G06F21/79
Domestic Patent References:
| JP8185360A | ||||
| JP9160831A | ||||
| JP3053328A | ||||
| JP6282431A | ||||
| JP2001256460A | ||||
| JP10228421A | ||||
| JP2003223362A |
Attorney, Agent or Firm:
Kazuhide Okada