Abstract:
An apparatus and a method for automatically generating security policy of SELinux(Security Enhanced Linux) based on SELT(SELinux Template) are provided to automatically generate security policy by using an operation pattern of designated application. A check module stores an inputted file name to a binary list(S201). The check module checks an execution state of a process of binary based on the binary list(S202). The check module finishes a corresponding process of an executing binary(S203). A system call log traced by generating the process is stored(S204,S205). The traced system call log is refined into a data required for generating the security policy(S206~S208). Objects are grouped(S209). A SELT security policy file is recorded in a system(S210). A redundancy and collision are detected between the generated SELT security policy and existing security policies inside the system(S211,S212).
Abstract:
An apparatus and a method for detecting an intrusion using a pattern are provided to increase a processing speed by considerably reducing an overload caused as whether a packet is harmful is inspected by every rule whenever a packet is inputted. A rule generating unit(103) classifies intrusion detection rules into rules having a contents inspection part and rules not having the contents inspection part, assigns an index to respective rules, and outputs the same to a device that performs matching, and at the same time, stores them. An extracting unit(101) extracts a payload and an address of a packet, and outputs the same to the device. An inspecting unit(105) inspects a corresponding rule based on the index. The rule generating unit patternizes an IP address part with respect to the rules without the contents inspection part, among the intrusion detection rules.
Abstract:
PURPOSE: An antenna is provided to obtain high isolation by attenuating a transmission signal which does not pass through an object. CONSTITUTION: A first antenna(2) and a second antenna(3) are vertically arranged with each other. A third antenna(4) and a fifth antenna(6) are symmetrical based on the plane formed by the first and second antennas. The third antenna and a fifth antenna are vertical to the first antenna. The inner cores of a feeding connector of the third and fifth antennas are arranged in the opposite direction. A fourth antenna(5) and a sixth antenna(7) are symmetrical based on the plane formed by the first and second antennas. The fourth antenna and the sixth antenna are horizontal to the first antenna.
Abstract:
A triode region type transconductor circuit with a wide linear range is provided to offer a wide linear input range by using an input transistor with short channel length by overlapping a plurality of distortion transconductances with basic transconductance. A triode region type transconductor circuit with a wide linear range includes a first transconductor unit(61), and a second transconductor unit(62). The first transconductor unit(61) receives differential pair input voltage through a first differential input transistor, and outputs basic transconductance. The second transconductor unit(62) compensates linearity of the basic transconductance, and receives the differential pair input voltage through a second differential pair input transistor parallel connected to the first differential input transistor for generating distortion transconductance to expand a linear range of ultimate transconductance.