Title:
COMMUNICATION TERMINAL DEVICE, SERVER TERMINAL DEVICE, AND COMMUNICATION SYSTEM USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/055169
Kind Code:
A1
Abstract:
A communication terminal includes a storage unit for holding a library function for
executing a first particular instruction before execution of a process to be
executed prior to a communication with a communication partner and executing a
second particular instruction before returning to a call source, a client application, its
attribute value, and an allowable address range of the first particular instruction. When
the client application executes the communication instruction and an internal interrupt
is generated, a communication instruction execution control unit controls
whether to execute the communication instruction according to the attribute
value of the client application. When the client application executes the first
particular instruction and an internal interrupt is generated, a security gate
entering process unit checks whether the address of the first particular instruction
is within the allowable address range. If within the allowable address range,
the attribute value of the client application is modified. When the client application
executes the second particular instruction and an internal interrupt is generated,
a security gate retreat process unit returns the attribute value of the client
application to the previous one.
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Inventors:
HONDA ATSUSHI (JP)
Application Number:
PCT/JP2006/322093
Publication Date:
May 18, 2007
Filing Date:
November 06, 2006
Export Citation:
Assignee:
NEC CORP (JP)
HONDA ATSUSHI (JP)
HONDA ATSUSHI (JP)
International Classes:
G06F21/44; G06F13/00
Foreign References:
JPH10336169A | 1998-12-18 | |||
JP2001516908A | 2001-10-02 | |||
JPH1173372A | 1999-03-16 |
Other References:
See also references of EP 1950680A4
Attorney, Agent or Firm:
KUDOH, Minoru (24-10 Minamiooi 6-chom, Shinagawa-ku Tokyo 13, JP)
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