JPH03184477A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To easily execute simplified secret communication with high security at low cost between a transmitter side and a receiver side by providing a scramble means to execute data scramble according to a prescribed control procedure or a descramble means to execute data descramble and notifying the function of the scramble means or the descramble means to an external part according to a prescribed transmission control procedure by a specified procedure signal under the control of a control means. CONSTITUTION:When picture data are transmitted, at a transmitter side facsimile equipment 40, an input original is read by a read part 41 and the read non- compressed binary data are converted to compressed binary data by a data compression part 42. At a receiver side facsimile equipment 50, the inputted data are demodulated by a MODEM 51, converted to scrambled binary data and sent to a descramble part 52. At the descramble part 52, N-digit figures (binary value) stored in a storage part 57 before a communication procedure and the scrambled binary data are successively restored to the compressed data by executing logic conversion, namely, being descrambled with EX.OR or EX.NOR logic.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a facsimile device for performing facsimile communication including a man-machine interface (operation), and particularly to a facsimile device equipped with a simple confidential communication method to prevent leakage. It is something.

(Prior art) Conventionally, as a technology in this field, "Data communication using modems and telephone networks" edited by Takao Hayashi, 3rd edition (November 1988)
-20) There was one described in CQ Publishing Co., Ltd. P, 61-63.

FIG. 2 is a block diagram showing an example of a configuration of secret communication between conventional facsimile machines.

In FIG. 2, a transmitter-side facsimile machine 10 and a receiver-side facsimile machine 20 are connected to a telephone exchange 31 via a communication line 30.

The transmitter-side facsimile device 10 reads the input original document. and a data compression unit 12 that compresses the output data of the reading unit 11. An external privacy device 14 is connected to the output side of the data compression unit 12 via a connector 13, and the connector 13 is further connected to a communication line 30 by modulating image data.
An output modem) 5 is connected.

The facsimile machine 20 with one voice call has a modem 21 on which the communication line 30 inputs the image data of t. is connected.

The connector 22 includes a data decompression unit 2 that decompresses data.
4 is connected, and furthermore, on the output side of the data expansion section 24, there is a recording section 25 that prints the expanded data on recording paper.
is connected.

Next, the operation will be explained.

When transmitting image data from the transmitter side facsimile machine 10 to the receiver side facsimile machine 20, the original to be transmitted is set in the reading section 11 of the transmitter side facsimile machine 10. The reading section 11 reads the input document as a one-dimensional time-series signal, and supplies the signal to the data compression section (2).

The data compression unit 12 compresses the output data of the reading unit 11 and transfers the compressed data to the connector) 3.
It is given to the external confidential communication device 14 via. The data compression method is the MH method (modified Huffma) recommended by the Consultative Committee on International Telegraph and Telephone (CCITT).
n code, -dimensional encoding method> or MR method (m.

In addition to the cliried READ code, two-dimensional encoding method, the original mode MMR method (modified
d modified READ code).

For example, as described in the above-mentioned document, the confidential communication device 14 is composed of a shift 1 register, a counter, an exclusive OR gate (hereinafter referred to as Ex/OR gate), etc., and converts compressed data according to its scrambling theory. Randomize and scramble.

The scrambled data is modulated by the modem 15 and then sent to the facsimile machine 20 on the receiver side via the one-way line 30 and the telephone exchange 31.

Reception i′: In the machine facsimile device 20, the communication line 3
The data sent from 0 is demodulated by a modem 21 and sent to an external private communication device 23 via a connector 22. The confidential communication device 23 descrambles the demodulated data using the reverse procedure of randomization and restores it to compressed data. This compressed data is expanded by the data expansion section 24 and returned to compressed data, and then printed as an image on recording paper by the recording section 25.

(Problems to be Solved by the Invention) However, the facsimile apparatus having the above configuration has the following problems.

(a> 14.23 for both confidential information is provided to prevent data leakage, but this confidential information device 14.23
is external, and also requires connectors 13 and 22 to connect it. Therefore, there was a drawback that the manufacturing and assembly process became complicated.

(b) Unless the data scrambling logic is set to be the same between the communication device and receiver side ■4 and 23 in advance, it will be difficult to restore the correct data on the receiver side. becomes.

However, if the data scrambling logic had to be set the same between both devices in advance, the setting work was not only cumbersome, but also difficult to change, resulting in mutual restrictions on data communication. .

The present invention addresses the problems that the above-mentioned prior art had. The present invention provides a facsimile device which solves the trouble of setting data scrambling logic between the two communication devices in advance.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a reading unit that scans an input document and reads the input document as a one-dimensional time-series signal, and a reading unit that modulates or demodulates image data. modem and
a data compression section that compresses the output data of the reading section or a data decompression section that decompresses the data demodulated by the modem; and a recording section that prints the data decompressed by the data decompression section on recording paper as an image. This facsimile machine is equipped with the following means.

That is, an input means capable of inputting an N-digit number (N is a positive integer) for scrambling or descrambling data, a storage means for storing the N-digit number, and a predetermined control procedure. N stored in the storage means according to
Exclusive OR (hereinafter referred to as Ex-OR) or exclusive negative OR (hereinafter referred to as Ex-OR) of the digit number and the data compressed by the data compression unit or the data compressed by the modem
A scrambling means for performing data scrambling or a descrambling means for performing data descrambling in order to obtain Ex-NOR; A control means for notifying the outside is provided.

(Function) According to the present invention, since the facsimile device is configured as described above, when data on a communication line is to be kept private for confidentiality purposes, when N-digit numbers are input using the input means on the transmitter side, The number is stored in the storage means, and is also notified to the receiver side by the control means, and is stored in the storage means on the receiver side. At this time, on the receiver side, an N-digit number may be input using an input means on the receiver side and stored in the storage means.

On the transmitter side, a reading section reads an input document, and the read data is compressed by a data compression section.

In the scrambling means, according to a predetermined control procedure, the compressed data and the number input by the input means are
Data is scrambled using OR logic or Ex/NOR logic, and the scrambled data is modulated by the modem and sent to the receiver side.

On the receiver side, after the transmitted data is demodulated by the modem, the descrambling means performs Ex-OR logic or Ex-NOR logic between the demodulated data and the number stored in the storage means. data is taken and data descrambling is performed. The descrambled data is decompressed by the data decompression section and returned to uncompressed data, and then printed on recording paper by the recording section. As a result, three messages can be sent in one group, and at the same time, data on the communication line can be confidential without requiring an external privacy device. Therefore, the above problem can be solved.

(Embodiment) FIG. 1 shows an embodiment of the present invention, and is a block diagram showing an example of a configuration of confidential communication between facsimile machines.

In FIG. 1, a transmitter-side facsimile machine 40 and a receiver-side facsimile machine 50 are connected to each other via a communication line 60 and a telephone exchange 61. In FIG.

The transmitter-side facsimile device 40 includes a reading section 41 that scans an input document and reads the input document as a one-dimensional time-series signal. The reading unit 41 is composed of a CCD type or MOS type semiconductor image sensor, etc.
On the output side, a data compression section 42 and a scrambling section 43 are provided.
and a modem 44 are connected. Furthermore, the reading section 41, the data compression section 42, and the modem 44 are connected to the control section 46.
At the same time, the scramble section 43 is connected to the storage section 47.
It is connected to the. The control section 46 is connected to the storage section 47 and also to the operation panel 45.

Here, the data compression section 42 has a function of compressing the output data of the reading section 41, and uses the MH method or MR method according to the CCITT recommendation, or the original mode M
It is composed of MR method, etc.

The scramble unit 43 is configured to combine the N-digit number stored in the storage unit 47 with the data compressed by the data compression unit 42.
It has a function as a data scrambling means that scrambles data by determining OR or Ex-NOR. The modem 44 has a function of modulating the output of the scrambler 43 and sending it to the communication line 6.0. The operation panel 45 has a function as an input means capable of inputting N-digit numbers for scrambling data.

The control unit 46 has a function as a control means for controlling the entire transmitter-side facsimile machine, and for example, CCI T T
In Recommendation T.30 communication, it has a function of notifying the receiver-side facsimile device 50 of a confidential communication function using a non-standard procedure signal (NSF>).

The storage section 47 has a function as a storage means for storing N-digit numbers inputted from the operation panel 45, and is composed of a semiconductor memory, a register, and the like. Scramble section 43
, the control section 46, and the storage section 47 are constituted by, for example, a microcomputer having a ℃PU, a memory, etc., and operates according to a program stored in the memory.

The receiver facsimile device 50 has a modem 51 that performs fW MFi on data from the communication line 60, and outputs 1! of the modem. ! A descrambling section 52, a data decompression section 53, and a recording section 54 are connected to the decoder. modem 5
1. The data decompression section 53 and the recording section 54 are connected to a control section 56, and the descrambling section 52 is connected to a storage section 57. Furthermore, the storage section 57 is an I11 control section 56.
and an operation panel 55 is connected to the control section 56.
is connected.

Here, the descrambling unit 52 serves as a descrambling unit that performs data descrambling by determining Ex-OR or Ex·NOR between the N-digit number stored in the storage unit 57 and the data demodulated by the modem 51. It has the following functions. The data decompression unit 53 has a function of decompressing the output data of the descrambling unit 52. The recording section 54 has a function of printing the output data of the data decompression section 53 as an image on recording paper (not shown), and is configured by a thermal recording method, an electrostatic recording method, or the like. The operation panel 55 serves as an input means for inputting N-digit numbers for descrambling data. have the ability.

The control unit 56 has a function as a control means for controlling the entire receiver-side facsimile device, and for example, in CCITT Recommendation T.30 communication, the transmitter-side facsimile device 40 controls the secret communication function using a non-standard procedure signal (NSF). /\ Has a notification function.

The storage unit 57 has the function of storing an N-digit number input from the operation panel 57 or an N-digit number sent from the transmitter-side facsimile device 40, and stores a register, semiconductor memory, etc. So jf! # Being intimidated. The descrambling section 52, the control section 56, and the storage section 57 are configured of a microcomputer or the like having a CPU, a semiconductor memory, etc., similarly to the transmitter side.

In FIG. 1, the transmitter-side facsimile device 40 is shown as a sending-only device, and the receiver-side facsimile device 50 is shown as a receiving-only device. It has both functions.

In other words, in a facsimile machine that has sending and receiving functions,
For example, the scramble section 43, descramble section 52, control section 46.56, and storage section 47.57 are configured with a microcomputer, etc., the modems 44 and 51 are configured with one modem, and the operation panels 45 and 55 are also configured with one modem. Consists of an operation panel.

Figure 3 shows Group 3 in accordance with CCITT Recommendation T.30.
2 is a state transition diagram of communication protocols and operator operations when simple confidential communication is executed using the method of the present embodiment, and the operation of FIG. 1 will be explained with reference to this diagram. FIG.

First, the operator places a document on the reading section 41 of the transmitter-side facsimile device 40, operates the operation panel 45 to select the confidential communication function, enters an N-digit number, and then sends it via the control section 46. It is stored in the storage unit 47. after that,
Communication is started by operating the operation panel 45 and placing a call to the destination. The facsimile device communication protocol (transmission control procedure) is based on CCITT Recommendation T.30, and communication is started according to the procedure specified in Recommendation T.30.

In the receiver-side facsimile device 50, before communicating,
The user operates the operation panel 55 to select the confidential communication function, inputs the same N-digit number as on the transmitter side, and stores it in the storage section 57 via the control section 56. Note that the operation panel 55
Instead of inputting an N-digit number by the operation of , the N-digit number notified from the transmitter-side control unit 46 is received by the receiver-side control unit 6, and the number is stored in the storage unit 57. It is also possible to

When the receiver side facsimile device 50 receives a call from the sender side, it sends a CED (Called 5tation).
Identification, called station identification), NSF (N0II-3ja
ndard FaCl l! ties, non-standard functions), CS I (Called 5ubscribe)
er Identification, calling terminal identification
, and D I S (D+g+taIdentific
ation signal, digital identification signal> to the transmitting machine.

In the transmitter side facsimile device 40, the NS
When receiving the reception capability declaration signal of F, C3I and DST,
The control unit 46 checks whether there is a secret communication function declaration (NSF) on the receiver side. If there is a secret communication function declaration, in the transmission one-word mode declaration S, that is, TS I (T
ranSmlttln(] 5tatlOnIdent
ification, sending terminal identification>, NSS (Non-3 standard procedure signal)
5et-up, non-standard function setting>, and TCF (Check,
When outputting each signal (Training Check), a secret communication function declaration (NSS) is performed.

If a confidential communication function declaration (NSF) is not made on the receiver side, the facsimile machine 40 on the sending side disconnects the communication line 60 as the pre-transmission procedure has not been established and does not perform the transmission 1λ.

CFR (Confirmation to
When a signal (Rece+ve, reception preparation confirmation) is sent, it means that the pre-communication procedure has been established, and the transmitter side then moves on to transmitting the image data. That is, when transmitting image data, an input document is read by the reading section 41 in the transmission 1'g machine facsimile device 40, and the read uncompressed binary data is converted into compressed binary data by the data compression section 42. is converted to The compressed binary data and the N-digit number (binary value) stored in the storage unit 47 are
Ex OR or Ex
-NOR is taken and the data is scrambled, and the scrambled data is modulated by the modem 44 and sent to the facsimile machine 50 via the communication line 60 and the telephone exchange 6L.

The received data is demodulated by the modem 5 and scrambled by the facsimile machine.
The data is converted into value data and sent to the descrambling unit 2. In the descrambling unit 52, before the communication procedure, the memory unit 57
The N-digit numbers (binary direct) stored in The restored compressed data is decompressed by a data decompression section 53 and converted into uncompressed binary data, and then printed on a recording paper (not shown) by a recording section 54.

In 11, EOP (End o
f Procedure.

When the signal (procedure end) is output, the M
CF ()Iessage Confire+natio
n, message confirmation) signal. Furthermore, sending 1
When a DCN (Disconnect, line disconnection command) signal is output, the communication line 60 is disconnected and the transmission of the document is ended.

As described above, this embodiment has the following advantages.

The scramble unit 43 and descramble unit 52 are built into the facsimile machine 40.50, and the scramble unit 43 and descramble unit 52 are executed under program control of the control unit 46.56, so that it is not necessary to use an external device as in the past. It does not require a private communication device or a connector to connect it, thereby simplifying the manufacturing and assembly process. Furthermore, there is no longer the need for logical settings for an external confidential communication device between the transmitter side and receiver side facsimile machines as in the past, and simple confidential communication can be easily realized at low cost. Moreover, with N digits, Ex-
Since scrambling is performed using OR or Ex-NOR logic, 2 (Nx4) types of patterns can be used for secret communication, thereby accurately preventing secret leakage.

It should be noted that the present invention is not limited to the illustrated embodiment, but may include adding a circuit for improving accuracy to the facsimile machine 40 or 50 of FIG. Transformation of the gods is possible. (Effects of the Invention) As described in detail above, according to the present invention, a scrambling means for scrambling data or a descrambling means for descrambling data is provided according to a predetermined control procedure, Since the control means is configured to notify the external I\ of the function of the scrambling means or descrambling means using a specific procedure signal according to a predetermined one-way control procedure,
To easily perform confidential communication with high security at low cost between a transmitter side and a receiver side. This eliminates the need for a conventional external communication device and a connector for connecting it, which simplifies the manufacturing and assembly process of the facsimile device. Moreover, the conventional external device eliminates the trouble of having to set the data scrambling logic of the private communication device to be the same on both the transmitter and receiver sides, thereby eliminating mutual restrictions on data communication. This can be largely eliminated and the use of confidential communications can be expected to expand.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and is a block diagram of a one-word configuration for confidential communications between facsimile machines, FIG. 2 is a block diagram of a conventional configuration of fifteen confidential communications between facsimile machines, and FIG. FIG. 3 is a communication protocol state transition diagram in group 3 communication in the figure. 40... Transmitter side facsimile device, 41...
...reading section, 42...data compression section, 43
・・・・・・Scramble part, 44.51・・・・・・
Modem, 45.55... Operation panel, 46.5
6...Control unit, 47, 57...Storage unit, 50...Receiver side facsimile device, 52.
... Descrambling section, 53 ... Data decompression section, 54 ... Recording section, 60 ... Communication line, 61 ... Telephone exchange.

Claims (1)

[Scope of Claims] A reading unit that scans an input original and reads the input original as a one-dimensional time-series signal, a modem that modulates or demodulates image data, and data that compresses the output data of the reading unit. In a facsimile machine, the facsimile apparatus includes a data decompression part that decompresses the data demodulated by the compression part or the modem, and a recording part that prints the data decompressed by the data decompression part as an image on recording paper, the data being scrambled or an input means capable of inputting an N-digit number (N is a positive integer) for descrambling; a storage means for storing the N-digit number; and a storage means for storing the N-digit number in accordance with a predetermined control procedure. scrambling means or data descrambler that performs data scrambling by determining the exclusive OR or exclusive NOR of the N-digit number obtained by the data compression unit and the data compressed by the data compression unit or the data demodulated by the modem. 1. A facsimile apparatus comprising: descrambling means for performing scrambling; and control means for notifying the outside of the function of said scrambling means or descrambling means using a specific procedure signal in accordance with a predetermined transmission control procedure.