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KR970056123A - Secret / Plain Text Communication Method Using Fast Select - Google Patents

Secret / Plain Text Communication Method Using Fast Select Download PDF

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Publication number
KR970056123A
KR970056123A KR1019950053947A KR19950053947A KR970056123A KR 970056123 A KR970056123 A KR 970056123A KR 1019950053947 A KR1019950053947 A KR 1019950053947A KR 19950053947 A KR19950053947 A KR 19950053947A KR 970056123 A KR970056123 A KR 970056123A
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KR
South Korea
Prior art keywords
plain text
call
secret
communication
text communication
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Application number
KR1019950053947A
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Korean (ko)
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KR0168924B1 (en
Inventor
손기욱
정현철
박응기
홍승현
신기수
Original Assignee
양승택
한국전자통신연구원
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Priority to KR1019950053947A priority Critical patent/KR0168924B1/en
Publication of KR970056123A publication Critical patent/KR970056123A/en
Application granted granted Critical
Publication of KR0168924B1 publication Critical patent/KR0168924B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

본 발명은 패스트 선택(Fast-Select)을 이용하여 호 설정 단계에서 비밀 또는 평문 통신을 선택하는 비밀/평문 통신 방법에 관한 것으로, X.25 프로토콜의 패스트 선택(Fast Select)을 이용하여 호 설정 단계의 패킷에 존재하는 128바이트의 사용자 데이터 영역에 선택적으로 비밀 통신 및 평문 통신이 가능하도록 특수 문자를 첨가하여 착/발신측간에 전송하여 비밀/평문 통신을 수행한다. 따라서, 본 발명은 정보 보호 시스템이 없는 사용자와의 통신에서 발생할 수 있는 통신 두절이나 회선의 비효율성을 감소시킬 수 있고, 정보 보호 시스템의 효율성 및 적합성을 향상시킬 수 있는 효과가 있다.The present invention relates to a secret / plain text communication method for selecting secret or plain text communication in a call setup step using fast select, and a call setup step using fast select of the X.25 protocol. Secret / Plain text communication is performed by adding special characters to the 128-byte user data area in the packet to send special characters to enable the secret communication and plain text communication. Therefore, the present invention can reduce the communication interruption or line inefficiency that can occur in communication with a user who does not have an information protection system, and can improve the efficiency and suitability of the information protection system.

Description

패스트 선택(Fast Select)을 이용한 비밀/평문 통신 방법Secret / Plain Text Communication Method Using Fast Select

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명이 적용되는 X.25 통신 시스템의 구성도,2 is a block diagram of an X.25 communication system to which the present invention is applied;

제3도는 본 발명에 따른 호 요구 및 착신 호 패킷의 구조도,3 is a structural diagram of a call request and incoming call packet according to the present invention;

제4도는 본 발명에 따른 호 수락 및 호 접속 패킷의 구조도,4 is a structural diagram of a call accept and call connection packet according to the present invention;

제5도는 본 발명에 따른 발신측 흐름도,5 is a flow chart of a calling party according to the present invention;

제6도는 본 발명에 따른 착신측 흐름도.6 is a flowchart of a called party according to the present invention.

Claims (2)

X.25 통신 시스템에 적용되는 발신측 비밀/평문 통신 방법에 있어서, 착신자의 주소와 특수 문자로 호 요구 패킷을 구성하여 호 요구 패킷을 착신측으로 전송하는 제1단계(501, 502); 착신측으로부터 호 접속 패킷을 수신하여 사용자 데이터 영역으로부터 특수 문자를 추출하여 판단하는 제2단계(503 내지 505); 및 상기 제2단계(503 내지 505)의 판단 결과, 평문 통신 응답 문자이거나 특수 문자가 없을 경우에는 평문 통신을 수행하고 호를 해제하며, 비문 통신 응답 문자인 경우에는 비밀 통신을 수행하고 호를 해제하는 제3단계(505 내지 509)를 포함하는 것을 특징으로 하는 발신측 비밀/평문 통신 방법.CLAIMS 1. A source side secret / plain text communication method applied to an X.25 communication system, comprising: a first step (501, 502) of constructing a call request packet with an address of a called party and special characters and transmitting the call request packet to a called party; A second step (503 to 505) of receiving a call connection packet from the called party and extracting and determining a special character from the user data area; And as a result of the determination of the second step 503 to 505, if there is no plain text communication response character or special character, performs plain text communication and releases the call, and if it is an inscription communication response character, performs secret communication and releases the call. And a third step (505 to 509). X.25 통신 시스템에 적용되는 착신측 비밀/평문 통신 방법에 있어서, 발신측으로부터 착신 호 패킷을 수신하면 사용자 데이터 영역으로부터 특수 문자를 추출하여 판단하는 제1단계(601 내지 603); 상기 제1단계(601 내지 603)의 판단 결과, 특수 문자가 없을 경우에는 호 수락 패킷을 발신측으로 전송한 후에 평문 통신을 수행하고 호를 해제하는 제2단계(604, 609, 612); 상기 제1단계(601 내지 603)의 판단 결과, 평문 통신 특수 문자인 경우에는 평문 응답 특수 문자를 호 수락 패킷의 사용자 데이터 영역에 첨가하여 호 수락 패킷을 구성하여 발신측으로 전송한 후에 평문 통신을 수행하고 호를 해제하는 제3단계(605, 607, 610, 612); 및 상기 제1단계(601 내지 603)의 판단 결과, 비밀 통신 특수 문자인 경우에는 비밀 응답 특수 문자를 호 수락 패킷의 사용자 데이터 영역에 첨가하여 호 수락 패킷을 구성하여 발신측으로 전송한 후에 비밀 통신을 수행하고 호를 해제하는 제4단계(606, 608, 611, 612)를 포함하는 것을 특징으로 하는 착신측 비밀/평문 통신 방법.A called party secret / plain text communication method applied to an X.25 communication system, comprising: a first step (601 to 603) for extracting and determining a special character from a user data area when receiving an incoming call packet from an originating party; A second step (604, 609, 612) of performing plain text communication and releasing the call after transmitting a call accept packet to the calling party when there are no special characters as a result of the determination of the first step (601 to 603); As a result of the determination of the first step (601 to 603), in the case of the plain text communication special character, the plain text response special character is added to the user data area of the call accept packet to construct a call accept packet and transmit the plain text communication special character to the calling party before performing plain text communication. A third step (605, 607, 610, 612) to release the call; And as a result of the determination in the first step (601 to 603), in the case of the secret communication special character, the secret response special character is added to the user data area of the call accept packet to construct a call accept packet and transmit it to the calling party. And a fourth step (606, 608, 611, 612) of performing and releasing the call. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950053947A 1995-12-22 1995-12-22 Method for communicating secret ordinary message by using fast select KR0168924B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950053947A KR0168924B1 (en) 1995-12-22 1995-12-22 Method for communicating secret ordinary message by using fast select

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950053947A KR0168924B1 (en) 1995-12-22 1995-12-22 Method for communicating secret ordinary message by using fast select

Publications (2)

Publication Number Publication Date
KR970056123A true KR970056123A (en) 1997-07-31
KR0168924B1 KR0168924B1 (en) 1999-02-01

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Application Number Title Priority Date Filing Date
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KR0168924B1 (en) 1999-02-01

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