JPS617743A - Privacy communication device - Google Patents
Privacy communication deviceInfo
- Publication number
- JPS617743A JPS617743A JP59128712A JP12871284A JPS617743A JP S617743 A JPS617743 A JP S617743A JP 59128712 A JP59128712 A JP 59128712A JP 12871284 A JP12871284 A JP 12871284A JP S617743 A JPS617743 A JP S617743A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- confidential
- signal
- privacy
- communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Bidirectional Digital Transmission (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野)
本発明は、会話の秘密性管寄る秘話通信装置で、特に、
半二重通信装置に使用される秘話装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a confidential communication device for controlling the confidentiality of conversations, and in particular,
The present invention relates to a confidential communication device used in a half-duplex communication device.
(従来技術とその問題点)
秘話通信装置の特性のうちで、秘話強度と音質は重要な
問題である0秘話強度は、秘話変換パラメータを時間的
に変化させることによって高めることができる。しかし
、従来の秘話通信装置では、このパラメータを周期的に
変化させていたために、変化のたびに切シ換え雑音が発
生し、音質が劣化するという問題があった。(Prior Art and its Problems) Among the characteristics of a confidential communication device, the intensity of confidential communication and the sound quality are important issues.The intensity of 0 confidential communication can be increased by temporally changing the confidential communication parameter. However, in conventional confidential communication devices, since this parameter is changed periodically, switching noise is generated every time the parameter changes, resulting in a problem that the sound quality deteriorates.
(発明の目的)
本発明の目的は、秘話変換バラメ二りを切ル換えても、
音質の劣化がない秘話通信装置を提供することにある口
(発明の構成)
本発明によれば、牛2重通信において入力信号に秘話を
施す秘話通信装置であって、後記乱数発生回路よル供給
される秘話パラメータ信号に応じて秘話変換パラメータ
を変化させて入力信号を秘話信号に変換する秘話変換回
路と、通信方向を切換えるだめの通信方向切換信号発生
回路と、該切換信号発生回路より切換信号が供給される
たびに発生される数値を秘話パラメータ信号として前記
秘話送信回路に供給する乱数発生回路と、前記秘話パラ
メータ信号を暗号化する暗号化回路と、前側と、送信側
より供給される信号から秘話信号と暗号化された秘話パ
ラメータ信号と全分離する手段と、該手段より供給され
る暗号化された秘話パラメータ信号を秘話パラメータに
もどす暗号復号手段と、該暗号復号手段より供給される
秘話バラメータ信号に応じて前記秘話信号を秘話逆変換
する秘話逆変換回路とを少なくとも含む受信側とから構
成されたことを特徴とする秘話通信装置が得られる。(Object of the invention) The object of the invention is that even if the secret conversion variable is changed,
An object of the present invention is to provide a confidential communication device without deterioration in sound quality (Arrangement of the Invention) According to the present invention, there is provided a confidential communication device that performs confidential communication on an input signal in cow duplex communication, which uses a random number generation circuit described later. A confidential conversation conversion circuit that converts an input signal into a confidential signal by changing a confidential conversation conversion parameter according to a confidential conversation parameter signal that is supplied, a communication direction switching signal generation circuit for switching the communication direction, and switching from the switching signal generation circuit. a random number generation circuit that supplies a numerical value generated each time a signal is supplied to the confidential message transmission circuit as a confidential parameter signal; an encryption circuit that encrypts the confidential parameter signal; means for completely separating the secret signal and the encrypted secret parameter signal from the signal; decryption means for returning the encrypted secret parameter signal supplied from the means to the secret parameter; There is obtained a confidential communication device characterized in that it is comprised of a receiving side that includes at least a confidential communication inverse conversion circuit that inversely converts the confidential communication signal into confidential communication in accordance with a confidential communication parameter signal.
(実施例)
本発明は半二重通信において、会話が交互に行われるこ
とに着目して、秘話パラメータの変化を必らず会話の切
れ目に行うことで音質の劣化を防ぐものである。(Embodiment) The present invention focuses on the fact that conversations take place alternately in half-duplex communication, and prevents deterioration of sound quality by always changing the confidential conversation parameter at the break in the conversation.
第1図および第2図線各々本発明の秘話通信装置の第1
の実施例における送信装置と、受信装置のブロック図で
ある。入力端子101よ少入力される音声信号は秘話送
信回路102により秘話を施されたのち、後で述べる暗
号化された秘話パラメータ信号〆とに信号多重化回路1
03に入力されて多重化されたのち、送信機104によ
り送信される。FIG. 1 and FIG. 2 show the first lines of the confidential communication device of the present invention, respectively.
FIG. 2 is a block diagram of a transmitting device and a receiving device in an embodiment of the present invention. The audio signal that is input to the input terminal 101 is encrypted by the confidential message transmitting circuit 102, and then sent to the signal multiplexing circuit 1 to receive an encrypted confidential message parameter signal, which will be described later.
After being input to 03 and multiplexed, it is transmitted by a transmitter 104.
秘話送信装置102は秘話操作においてパラメータが変
化できるものであれはどのようなものでもよい0例え球
、音声帯域を数個の帯域に分割して入れ換える、いわゆ
る帯域分割入れ換え方式などが考えられる。このとき、
帯域の入れ換え方は多数の種類があシ、これが秘話パラ
メータとなる。との秘話パラメータは、乱数発生回路1
06により発生される乱数によって定められる。乱数に
よって、秘話パラメータを具体的にどのように生成させ
るかは、従来よく知られているし、また本発明の動作で
は重要でないので、ここで杜説明を省略す名。The confidential message transmitting device 102 may be of any type as long as its parameters can be changed during the confidential message operation.For example, it may be a so-called band division exchange method in which the audio band is divided into several bands and exchanged. At this time,
There are many ways to swap bands, and this is a secret parameter. The secret parameter is the random number generation circuit 1
It is determined by a random number generated by 06. The specific method of generating secret parameters using random numbers is well known and is not important to the operation of the present invention, so a detailed explanation will be omitted here.
重要なことは、いかにして会話の切れ目において、パラ
メータを切換えるかである。What is important is how to switch parameters at breaks in conversation.
入力端子105には送受借切シ換え制御信号が入力され
る。この送受信制御信号は、通常位マイクに付加されて
いる押ボタンによって発生される。A transmission/reception switching control signal is input to the input terminal 105 . This transmission/reception control signal is normally generated by a push button attached to the microphone.
送信管行うために押ボタン金押すと、乱数発生回路10
6の出力がラッチ回路107により取シ込まれると同時
に、送信機104を送信状態にする。ラッチ回路107
の出力は秘話送信装置102に入力されて秘話パラメー
タを発生させると同時に、暗号化回路109に入力され
て、暗号化されたのち、多重化回路103に入力される
。暗号化回路109は出力信号により入力信号を容易に
特定できなければとの上すなものでもよく、例えば良く
知られている非線型フィードバックシフトレジスタで構
成できる。信号多重化回路も、多重化された信号を受信
側で分離できれば、どのような構成でもよく、例えば、
音声信号スペク)7yの下部帯域(0〜300Hz)に
、暗号化秘話パラメータ信号を挿入する周波数多重が考
えられる。この場合には、受信側では、フィルタで二つ
の信号を分離することになる〇送信信号社受信機204
に入力され、その出力社信号分離回路203・に入力さ
れ送信側で行われた多重化信号の分離が行われる。分離
された信号のうち秘話音声信号は秘話受信機202に入
力されて秘話が元に戻される0分離された信号のうち暗
号化秘話バラメータ信号は、暗号復号回路208により
復号されたのち、秘話パラメータ信号受信回路209に
記憶される0暗号復号回路208は暗号化回路109と
対になって動作するものであり、具体的構成は使用する
暗号化方式により異なる口第3者が仮に盗聴を行うとし
て、秘話を元に戻すためには秘話パラメータを知る必要
がちシ、そのためには暗号を解かなければならない0
第3図および第4図は各々本発明の秘話通信装置の第2
の実施例における送信装置と受信装置のブロック図を示
す図である0これらの実施例では第1の実施例に対して
、送信装置にラッチ回路308が、受信装置にラッチ回
路407が新たに付加されたものであシ、他の部分は同
じような動作をする0したがって、ここでは、第1の実
施例と異なる部分のみを重点的に説明する。送信を行う
ために押ボタンを押すと、送受信切り換え制御信号が入
力端−子305に入力され、ラッテ回路307および3
09ヲ動作させると同時に、送信機304 ffi送信
状態にする0音声信号は入力端子301より入力され、
秘話送信回路302、多重化回路303 e通りたのち
、送信機304より送信される。乱数発生回路306の
出力は、まずラッチ回路307に増シ込ま九たのち、ラ
ッチ回路308の入力となるのと同時に、暗号化回路3
09により暗号化されて信号多重化回路303で秘話音
声信号とともに合成されたのち送信される。When the push button is pressed to carry out the transmission, the random number generation circuit 10
At the same time that the output of 6 is received by the latch circuit 107, the transmitter 104 is placed in a transmitting state. Latch circuit 107
The output is input to the secret message transmitting device 102 to generate a secret message parameter, and at the same time, it is input to the encryption circuit 109 and encrypted, and then input to the multiplexing circuit 103. The encryption circuit 109 may be of any type as long as the input signal cannot be easily identified by the output signal, and may be constructed of, for example, a well-known nonlinear feedback shift register. The signal multiplexing circuit may have any configuration as long as the multiplexed signals can be separated on the receiving side, for example,
Frequency multiplexing may be considered in which an encrypted secret parameter signal is inserted into the lower band (0 to 300 Hz) of the audio signal spectrum 7y. In this case, on the receiving side, the two signals will be separated by a filter.
The multiplexed signal is input to the output signal separation circuit 203 and is separated from the multiplexed signal performed on the transmitting side. Of the separated signals, the confidential voice signal is input to the confidential voice receiver 202 to restore the confidential voice.0 Among the separated signals, the encrypted confidential voice parameter signal is decoded by the decryption circuit 208, and then converted into the confidential voice parameter. The 0 encryption/decryption circuit 208 stored in the signal reception circuit 209 operates in pair with the encryption circuit 109, and the specific configuration differs depending on the encryption method used. , in order to restore the secret message, it is necessary to know the secret message parameters, and for that purpose, the encryption must be broken.
1 is a diagram showing a block diagram of a transmitting device and a receiving device in the embodiments.0 In these embodiments, a latch circuit 308 is newly added to the transmitting device, and a latch circuit 407 is newly added to the receiving device, with respect to the first embodiment. The other parts operate in the same way.Therefore, only the parts that are different from the first embodiment will be explained here with emphasis. When the pushbutton is pressed to perform transmission, a transmission/reception switching control signal is input to the input terminal 305, and the ratte circuits 307 and 3
At the same time as 09 is activated, a 0 audio signal is input from the input terminal 301 to put the transmitter 304 into the ffi transmission state.
After passing through the confidential message transmission circuit 302 and the multiplexing circuit 303e, it is transmitted from the transmitter 304. The output of the random number generation circuit 306 is first input to the latch circuit 307, and then becomes the input to the latch circuit 308, and at the same time, the output is input to the encryption circuit 3.
09, and is combined with the private voice signal in the signal multiplexing circuit 303 and then transmitted.
ラッチ回路308はラッテ回路307の出力をラッテす
るので、その出力信号はラッチ回路307の出力信号よ
り−もlラッチステップだけ時間的に早い信号となって
いる。したがワて、秘話送信回路302の秘話パラメー
タは秘話パラメータ暗号化回路309の出力よりも1ラ
ツテステツプだけ早い。これにより、送信装置では、秘
話パラメータを実際に使用する時刻よりも先に送信する
ことになる。Since the latch circuit 308 lattes the output of the latch circuit 307, its output signal is a signal that is temporally earlier than the output signal of the latch circuit 307 by l latch steps. Therefore, the secret parameter of the secret message transmission circuit 302 is earlier than the output of the secret parameter encryption circuit 309 by one rate step. As a result, the transmitting device transmits the secret parameter before the time when it is actually used.
受信機404により受信された信号は信号分離回路40
3で秘話音声信号と暗号化秘話パラメータ信号に分離さ
れる。秘話音声信号は秘話受信回路402で秘話が解か
れ、出力端子401に送信音声信号が得られる。暗号化
秘話パラメータ信号は暗号復号化回路408により復号
化されたのち秘話パラメータ信号受信回路409に記憶
される。秘話パラメータ信号受信回路407の出力は、
入力端子405に入力される送受借切シ換え制御信号を
ラッチ信号としてラッチ回路407に皐シ込まれ、秘話
受信回路に秘話パラメータ金出力する0ここで、秘話パ
ラメータ受信回路は、多数回送出された秘話パラメータ
信号を処理して、受信誤シを減少させるような動作を含
ませることができる。本実施例では、秘話パラメータを
前もって送信しておくので、このように秘話パラメータ
を多数回送出することによって秘話パラメータ伝送の信
頼性を高めることができる〕
(発明の効果)
本発明においては、秘話パラメータの変化は、会話の切
れ目に行われるために、パラメータの変化による音質の
劣化が起らないという効果がある。The signal received by receiver 404 is transmitted to signal separation circuit 40
3, the signal is separated into a confidential audio signal and an encrypted confidential parameter signal. The confidential speech signal is decrypted by the confidential speech receiving circuit 402, and a transmission audio signal is obtained at the output terminal 401. The encrypted secret parameter signal is decrypted by the encryption/decryption circuit 408 and then stored in the secret parameter signal receiving circuit 409 . The output of the confidential parameter signal receiving circuit 407 is
The transmission/reception transfer control signal inputted to the input terminal 405 is used as a latch signal and is input into the latch circuit 407, which outputs the confidential message parameter to the confidential message receiving circuit. The received confidential parameter signal may be processed to include operations to reduce reception errors. In this embodiment, since the confidential parameter is transmitted in advance, the reliability of confidential parameter transmission can be increased by transmitting the confidential parameter many times in this way. (Effects of the Invention) In the present invention, Since the parameter changes are made at breaks in the conversation, there is an advantage that the sound quality does not deteriorate due to parameter changes.
さらに、本発明では、乱数発生回路の出力を任意の時刻
に取シ込むことができるので、乱数発生回路のクロック
信号は、信号の送受信に無関係にすることができ、乱数
発生回路の構成が容易になる効果がちる。Furthermore, in the present invention, since the output of the random number generation circuit can be received at any time, the clock signal of the random number generation circuit can be made irrelevant to signal transmission and reception, and the configuration of the random number generation circuit is easy. The effect of becoming
第1図と第2図は、本発明の第1の実施例における、そ
れぞれ送信装置および受信装置のブロック図、第3図と
第4図は、本発明の第2の実施例におけるそれぞれ送信
装置および受信装置のブロック図を示す口これらの図に
おいて。
101、 301は音声信号入力端子、102.302
は秘話送信回路、103.303は信号多重化回路、1
04 、 304は送信機、105. 305. 40
5は送受借切シ換え制御信号入力端子、106.306
は乱数発生回路、107. 307. 308.407
はラッチ回路、109、 309は暗号化回路、201
. 401は音声信号出力端子、202. 402は秘
話受信回路、203゜403は信号分離回路、204.
404は受信機、208゜408は暗号復号回路、20
9.409は秘話パラメータ受信回路である。1 and 2 are block diagrams of a transmitter and a receiver, respectively, in a first embodiment of the present invention, and FIGS. 3 and 4 are block diagrams, respectively, of a transmitter and a receiver in a second embodiment of the present invention. and a block diagram of a receiving device are shown in these figures. 101, 301 are audio signal input terminals, 102.302
is a secret transmission circuit, 103.303 is a signal multiplexing circuit, 1
04, 304 is a transmitter, 105. 305. 40
5 is a transmission/reception transfer control signal input terminal, 106.306
is a random number generation circuit, 107. 307. 308.407
is a latch circuit, 109, 309 is an encryption circuit, 201
.. 401 is an audio signal output terminal, 202. 402 is a secret reception circuit, 203.403 is a signal separation circuit, 204.
404 is a receiver, 208° 408 is an encryption/decryption circuit, 20
9.409 is a confidential parameter receiving circuit.
Claims (1)
であって、後記乱数発生回路より供給される秘話パラメ
ータ信号に応じて秘話変換パラメータを変化させて入力
信号を秘話信号に変換する秘話変換回路と、通信方向を
切換えるための通信方向切換信号発生回路と、該切換信
号発生回路より切換信号が供給されるたびに発生される
数値を秘話パラメータ信号として前記秘話送信回路に供
給する乱数発生回路と、前記秘話パラメータ信号を暗号
化する暗号化回路と、前記秘話変換回路出力と前記暗号
化回路出力とを多重化して送信する手段とを少なくとも
含む送信側と、送信側より供給される信号から秘話信号
と暗号化された秘話パラメータ信号とを分離する手段と
、該手段より供給される暗号化された秘話パラメータ信
号を秘話パラメータにもどす暗号復号手段と、該暗号復
号手段より供給される秘話パラメータ信号に応じて前記
秘話信号を秘話逆変換する秘話逆変換回路とを少なくと
も含む受信側とから構成されたことを特徴とする秘話通
信装置。A confidential communication device that performs confidential communication on an input signal in half-duplex communication, the confidential conversion circuit converting the input signal into a confidential signal by changing a confidential conversion parameter according to a confidential parameter signal supplied from a random number generation circuit described later. a communication direction switching signal generation circuit for switching the communication direction; and a random number generation circuit that supplies a numerical value generated each time a switching signal is supplied from the switching signal generation circuit to the confidential communication transmission circuit as a confidential communication parameter signal. , a transmission side including at least an encryption circuit for encrypting the secret parameter signal, and means for multiplexing and transmitting the output of the secret conversion circuit and the output of the encryption circuit; means for separating the signal from the encrypted confidential parameter signal; decryption means for returning the encrypted confidential parameter signal supplied by the means to the confidential parameter; and a confidential parameter signal supplied by the decryption means. 1. A confidential communication device comprising: a receiving side that includes at least a confidential communication inverse conversion circuit that inversely converts the confidential communication signal in accordance with the confidential communication.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59128712A JPH0628352B2 (en) | 1984-06-22 | 1984-06-22 | Confidential communication device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59128712A JPH0628352B2 (en) | 1984-06-22 | 1984-06-22 | Confidential communication device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS617743A true JPS617743A (en) | 1986-01-14 |
JPH0628352B2 JPH0628352B2 (en) | 1994-04-13 |
Family
ID=14991561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59128712A Expired - Lifetime JPH0628352B2 (en) | 1984-06-22 | 1984-06-22 | Confidential communication device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0628352B2 (en) |
-
1984
- 1984-06-22 JP JP59128712A patent/JPH0628352B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0628352B2 (en) | 1994-04-13 |
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