JPS6129232A - Data encipherment transmission system - Google Patents

Data encipherment transmission system

Info

Publication number
JPS6129232A
JPS6129232A JP14941684A JP14941684A JPS6129232A JP S6129232 A JPS6129232 A JP S6129232A JP 14941684 A JP14941684 A JP 14941684A JP 14941684 A JP14941684 A JP 14941684A JP S6129232 A JPS6129232 A JP S6129232A
Authority
JP
Japan
Prior art keywords
compression table
data
compression
transmission
compressed
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.)
Pending
Application number
JP14941684A
Other languages
Japanese (ja)
Inventor
Toshiaki Shimozaka
下坂 俊明
Jun Okada
純 岡田
Koichi Kunimasa
国正 興一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14941684A priority Critical patent/JPS6129232A/en
Publication of JPS6129232A publication Critical patent/JPS6129232A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/30Compression, e.g. Merkle-Damgard construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To secure the safety of data and to improve the data transmission efficiency by compressing the transmission data by a compression table, enciphering the compression table to transmit it together with the data and decoding the enciphered compression table at the reception side to restore the compressed data. CONSTITUTION:An analyzer 1 analyzes the character emerging frequency of the transmission data, and a compression table device 2 produces and stores a compression table suited to the compression processing of data based on the result of analysis of the analyzer 1. This compression table is enciphered by an enciphering device 3 and sent to a circuit 6 through a circuit controller 5. While a compressing device 4 compressed the compression data via the compression table of the device 2 and sends it to the circuit 6 through the controller 5 after the enciphered compression table. At the reception side, a circuit controller 7 decodes the enciphered compression table in the reception data through a decoder 8 to obtain a compression table. This table is stored to a compression table device 9. Then the compressed data is restored to the original data by a restoring device 10 by means of the compression table sent from the device 9.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、データ暗号化伝送方式に関する。[Detailed description of the invention] [Field of application of the invention] The present invention relates to a data encryption transmission method.

〔発明の背景〕[Background of the invention]

データ伝送の安全性を高めるたるに1種々のデータ暗号
化伝送方式が考えられている。しかし従来の方式は、伝
送データを全て暗号化して伝送し、受信側において暗号
化伝送データを復号化するため、暗号化および復号化の
処理時間が長く、また暗号化により伝送データ長が増加
し、その結果、データの伝送効率が悪いという欠点があ
った・伝送データ長を短縮するために、暗号化伝送デー
タをデータ圧縮する方式もあるが、そのような圧縮処理
を行っても、暗号化しない場合に比ベデータ伝送効率が
かなり悪化する。
Various data encryption transmission methods have been considered to increase the security of data transmission. However, with conventional methods, all transmitted data is encrypted before being transmitted, and the encrypted transmitted data is decrypted on the receiving side, which takes a long time to process for encryption and decryption, and encryption increases the length of the transmitted data. As a result, the data transmission efficiency was poor. - There are methods to compress encrypted transmission data in order to shorten the transmission data length, but even with such compression processing, the encryption If not, the data transmission efficiency will deteriorate considerably.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、従来と同等のデータ伝送の安全性を達
成し、かつ従来よりも伝送効率を改善できるデータ暗号
化伝送方式を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a data encryption transmission method that can achieve data transmission security equivalent to that of the conventional method and improve transmission efficiency compared to the conventional method.

〔発明の概要〕[Summary of the invention]

本発明によれば、伝送データは暗号化することなくその
ままデータ圧縮して伝送し、一方、伝送データの圧縮の
用いる圧縮テーブルを暗号化して伝送する。受信側にお
いては、暗号化圧縮テーブルを復号化して元の圧縮テー
ブルを得、その圧縮テーブルを用いて圧縮伝送データか
ら元の伝送データを復元する。即ち、圧縮テーブルの秘
密の鍵として利用し、その圧縮テーブルを暗号化して伝
送することにより、伝送データ長および暗号化・復号化
処理時間の短縮を図ると同時に、伝送データ全体を暗号
化すると同等のデータに安全性を達成するものである。
According to the present invention, transmission data is compressed and transmitted as it is without being encrypted, and on the other hand, a compression table used for compressing the transmission data is encrypted and transmitted. On the receiving side, the encrypted compression table is decrypted to obtain the original compression table, and the compression table is used to restore the original transmission data from the compressed transmission data. In other words, by using the compression table as a secret key and encrypting and transmitting the compression table, it is possible to reduce the length of the transmitted data and the encryption/decryption processing time, and at the same time, it is equivalent to encrypting the entire transmitted data. The goal is to achieve security for your data.

〔発明の実施例〕[Embodiments of the invention]

第1図は本発明の一実施例を示すブロック図である。こ
の図において、1〜5は送信側の装置であり、7〜10
は受信側の装置である。6は回線である。
FIG. 1 is a block diagram showing one embodiment of the present invention. In this figure, 1 to 5 are transmitting side devices, and 7 to 10
is the receiving device. 6 is a line.

送信側において、解析装置lは伝送データの出現文字の
頻度を解析し、その解析結果に基づいて圧縮テーブル装
置2は伝送データの圧縮処理に適し、た圧縮テーブルを
作成し□、内部に記憶する。暗号化装置3は、圧縮テー
ブル装置2によって作成された圧縮テーブルまたは圧縮
テーブルの変更情報(後述)を暗号化する。その暗号化
圧縮テーブルは、回線制御装置5を通して回線6へ送出
される。一方、圧縮化装置4は、圧縮テーブル装置2に
よって作成された圧縮テーブルを用いて、伝送データを
デ=り圧縮する。その圧縮伝送データは、暗号化圧縮デ
ータに続いて、回線制御装置5を通じて回線6へ送出さ
れる。
On the transmission side, the analysis device 1 analyzes the frequency of characters appearing in the transmission data, and based on the analysis result, the compression table device 2 creates a compression table suitable for compression processing of the transmission data and stores it internally. . The encryption device 3 encrypts the compressed table created by the compressed table device 2 or the change information of the compressed table (described later). The encrypted compression table is sent to the line 6 through the line control device 5. On the other hand, the compression device 4 uses the compression table created by the compression table device 2 to de-compress the transmission data. The compressed transmission data is sent to the line 6 through the line control device 5 following the encrypted compressed data.

受信側において1回線6を通じて伝送されてくる暗号化
圧縮テーブルと圧縮伝送データを回線制御装置7を通じ
て受信する。復号化装置8は、受信した暗号化圧縮テー
ブルを復号化し、伝送データの圧縮処理に用いられた圧
縮テーブルを得、それを圧縮テーブル装置9に記憶させ
る。復元゛他装置10は、圧縮テーブル装置9に記憶さ
れている圧縮テーブルを用い、受信された圧縮伝送デー
タから圧縮前の伝送データを復元する。
On the receiving side, the encrypted compression table and compressed transmission data transmitted through one line 6 are received through the line control device 7. The decryption device 8 decrypts the received encrypted compression table, obtains a compression table used for compression processing of the transmission data, and stores it in the compression table device 9. The restoring device 10 uses the compression table stored in the compression table device 9 to restore the uncompressed transmission data from the received compressed transmission data.

送信側の解析装置Iおよび圧縮テーブル装置2について
、第2図によりさらに説明する。この図に示すように、
解析装置lにおいては、一定間隔毎に伝送データ中の文
字の出現回数を頻度測定装置111により測定し、その
測定結果に従って頻度順変更装置12で各文字を頻度順
に並べ換える。
The transmitting side analysis device I and compression table device 2 will be further explained with reference to FIG. As shown in this figure,
In the analysis device 1, a frequency measuring device 111 measures the number of appearances of characters in the transmitted data at regular intervals, and a frequency order changing device 12 rearranges each character in order of frequency according to the measurement results.

圧縮テーブル装置2は、圧縮テーブル記憶装置14と圧
縮テーブル変更袋!13からなる。本実施     (
例においては、データ圧縮をハフマン符号化法によって
行うようになっており、伝送開始前は、第4図に例示す
るようなハフマンコードに対応する未割当て状態の圧縮
テーブルが圧縮テーブル記憶装置14に記憶されている
。伝送開始時には、解析装置1による解析結果と、圧縮
テーブル記憶装置14に記憶されている未割当て状態の
圧縮テーブルにより、圧縮テーブル変更装置13は圧縮
テーブルの割当てを行い、割当て後の圧縮テーブルを圧
縮テーブル記憶装置14に記憶させるとともに、暗号化
装置3へ送る。
The compression table device 2 includes a compression table storage device 14 and a compression table change bag! Consists of 13. This implementation (
In this example, data compression is performed using Huffman encoding, and before the start of transmission, an unallocated compression table corresponding to a Huffman code as illustrated in FIG. 4 is stored in the compression table storage device 14. remembered. At the start of transmission, the compression table change device 13 allocates a compression table based on the analysis result by the analysis device 1 and the unallocated compression table stored in the compression table storage device 14, and compresses the allocated compression table. It is stored in the table storage device 14 and sent to the encryption device 3.

圧縮テーブルの作成に当っては、第4図の例示するよう
に1文学の割当てを行い、「空」の部分を各頻度毎に1
〜数箇所作っておく、伝送中において一定間隔毎に頻度
が測定され、頻度順変更装置12から解析結果が出る。
When creating the compressed table, one literature is assigned as shown in Figure 4, and the "empty" part is divided into one for each frequency.
~Several locations are created, the frequency is measured at regular intervals during transmission, and the analysis results are output from the frequency order changing device 12.

圧縮テーブル変更装置13は、圧縮テーブル記憶装置1
4にある圧縮テーブルの頻度順と、頻度順変更装置12
によって与えら九る頻度順とを比較し、頻度が変更にな
った文字の再割当てを実施する。この再割当ては。
The compression table changing device 13 is the compression table storage device 1
4 and the frequency order changing device 12 of the compression table.
The characters whose frequency has changed are reallocated by comparing them with the frequency order given by . This reassignment.

変更文字の変更前の圧縮テーブルの変更先の頻度にある
「空」の部分に割り当てることによって行う。変更後の
圧縮テーブルは圧縮テーブル記憶装置14に記憶される
。また圧縮テーブルの変更部分は、暗号化装置3に送ら
れ、暗号化され伝送される。
This is done by assigning the change character to the "empty" part in the change destination frequency of the compression table before the change. The compressed table after the change is stored in the compressed table storage device 14. Further, the changed portion of the compression table is sent to the encryption device 3, encrypted, and transmitted.

ここで1本実施例ではキャラクタ対応文字の例を示して
いるが、他の図形データや画面データ等のビット列の場
合、伝送データ中のビット列を一定間隔(たとえば8ビ
ツト)毎に区切ることにより、同様に圧縮テーブルを作
成することができる。
Although this embodiment shows an example of characters corresponding to characters, in the case of bit strings such as other graphic data or screen data, by dividing the bit string in the transmission data at regular intervals (for example, 8 bits), Similarly, compressed tables can be created.

次に第3図を参照して、受信側の圧縮テーブル装置9に
ついてさらに説明する。圧縮テーブル未設定時は、復号
化装置8で復号化された圧縮テーブルが、圧縮テーブル
変更装置15により復元化用に修正されて圧縮テーブル
記憶装置16に格納される。伝送中においては、圧縮テ
ーブルの変更情報が伝送されて来た場合、復号化装置8
で復号化して圧縮テーブル変更装置15に送る。圧縮テ
ーブル変更装置15は、復号化装置8から与えられる変
更情報により、圧縮テーブル記憶装置14に記憶されて
いる圧縮テーブルを変更する。
Next, with reference to FIG. 3, the compression table device 9 on the receiving side will be further explained. When a compression table is not set, the compression table decoded by the decoding device 8 is modified for decompression by the compression table modification device 15 and stored in the compression table storage device 16. During transmission, if compressed table change information is transmitted, the decoding device 8
The data is decoded and sent to the compression table changing device 15. The compression table modification device 15 modifies the compression table stored in the compression table storage device 14 based on modification information provided from the decoding device 8 .

なお、上記実施例においては、伝送データを一伝間隔毎
に、つまり一定伝送文字数毎に解析し、圧縮テーブルを
変更しているが、伝送前に伝送データの全部または一部
を予め解析し、その解析結果に従って圧縮テーブルを作
成し、以後その圧縮テーブルを継続して使用するように
してもよい。
In the above embodiment, the transmission data is analyzed at every transmission interval, that is, every fixed number of transmission characters, and the compression table is changed, but all or part of the transmission data is analyzed in advance before transmission, A compression table may be created according to the analysis result, and the compression table may be continuously used from now on.

この場合、伝送中においては圧縮テーブルが変更される
ことはないから、圧縮テーブルの変更情報を暗号化して
送る必要はなくなる。
In this case, since the compression table is not changed during transmission, there is no need to encrypt and send the compression table change information.

また、データ圧縮法は、上述のハフマン符号化法に限ら
れるものではない。
Furthermore, the data compression method is not limited to the Huffman encoding method described above.

〔発明の効果〕〔Effect of the invention〕

以上詳細に説明したように1本発明のデータ暗号化伝送
方式は、送信側において、伝送データを暗号化するので
はなく、圧縮テーブルを暗号化し。
As explained in detail above, in the data encryption transmission method of the present invention, the transmission side does not encrypt the transmitted data but encrypts the compression table.

暗号化圧縮テーブルと圧縮伝送データとを伝送し。Transmit an encrypted compression table and compressed transmission data.

受信側において暗号化圧縮テーブルを復号化し。Decrypt the encrypted compression table on the receiving side.

復号した圧縮テーブルを用いて圧縮伝送データを元の伝
送データに復元する方式であるから、伝送データ全体を
暗号化および復号化する従来方式に比べ、暗号化および
復号化処理の時間が大幅に短縮され、また伝送データ長
も短縮されるため、データの安全性と伝送の効率化を同
時に満足させることができる。
Since this method uses a decrypted compression table to restore compressed transmission data to the original transmission data, the time required for encryption and decryption processing is significantly reduced compared to conventional methods that encrypt and decrypt the entire transmission data. Furthermore, since the transmission data length is also shortened, data safety and transmission efficiency can be satisfied at the same time.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す概略ブロック図、第2
図は送信側の解析装置および圧縮テーブル装置のブロッ
ク図、第3図は受信側の圧縮テーブル装置のブロック図
、第4図はハフマンコードの例を示す図である。 ■・・・解析装置、 2,9・・・圧縮テーブル装置。 3・・・暗号化装置、 4・・・圧縮化装置。 5.7・・・回線制御装置、 6・・・回線、8・・・
復号化装置、  1o・・・復元化装置。 11・・・頻度順測定装置、  12・・・頻度順変更
装置、   13.15・・・圧縮テーブル変更装置、
14.16・・・圧縮テーブル記憶装置。 第1図 第2図 4^ 第3図
FIG. 1 is a schematic block diagram showing one embodiment of the present invention, and FIG.
The figure is a block diagram of an analysis device and compression table device on the transmitting side, FIG. 3 is a block diagram of a compression table device on the receiving side, and FIG. 4 is a diagram showing an example of a Huffman code. ■...Analysis device, 2,9...Compression table device. 3... Encryption device, 4... Compression device. 5.7... Line control device, 6... Line, 8...
decoding device; 1o... decoding device; 11... Frequency order measuring device, 12... Frequency order changing device, 13.15... Compression table changing device,
14.16... Compressed table storage device. Figure 1 Figure 2 Figure 4 ^ Figure 3

Claims (1)

【特許請求の範囲】[Claims] (1)送信側において、伝送データを圧縮テーブルを用
い圧縮して伝送するとともに、その圧縮テーブルを暗号
化して伝送し、受信側において、暗号化圧縮テーブルを
復号化して元の圧縮テーブルを得、その圧縮テーブルを
用いて圧縮伝送データから伝送データを復元することを
特徴とするデータ暗号化伝送方式。
(1) On the transmitting side, transmit data is compressed using a compression table, and the compressed table is encrypted and transmitted, and on the receiving side, the encrypted compression table is decrypted to obtain the original compression table, A data encryption transmission method characterized in that transmission data is restored from compressed transmission data using the compression table.
JP14941684A 1984-07-20 1984-07-20 Data encipherment transmission system Pending JPS6129232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14941684A JPS6129232A (en) 1984-07-20 1984-07-20 Data encipherment transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14941684A JPS6129232A (en) 1984-07-20 1984-07-20 Data encipherment transmission system

Publications (1)

Publication Number Publication Date
JPS6129232A true JPS6129232A (en) 1986-02-10

Family

ID=15474636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14941684A Pending JPS6129232A (en) 1984-07-20 1984-07-20 Data encipherment transmission system

Country Status (1)

Country Link
JP (1) JPS6129232A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07219552A (en) * 1994-12-28 1995-08-18 Casio Comput Co Ltd Musical sound waveform generation device and musical sound waveform compression device
JP2001189718A (en) * 1999-12-28 2001-07-10 Eiichi Masai Method and device for preparing date-designated document, and recording medium recorded with preparation program of date-designated document
US6504931B1 (en) 1996-02-28 2003-01-07 Hitachi, Ltd. Method and apparatus for encrypting data
JP2014131197A (en) * 2012-12-28 2014-07-10 Axell Corp Content data processing method, content server, client terminal, and content distribution system
JP7232961B1 (en) * 2022-11-01 2023-03-03 太人 田中 Information transmission method and information transmission system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07219552A (en) * 1994-12-28 1995-08-18 Casio Comput Co Ltd Musical sound waveform generation device and musical sound waveform compression device
US6504931B1 (en) 1996-02-28 2003-01-07 Hitachi, Ltd. Method and apparatus for encrypting data
JP2001189718A (en) * 1999-12-28 2001-07-10 Eiichi Masai Method and device for preparing date-designated document, and recording medium recorded with preparation program of date-designated document
JP2014131197A (en) * 2012-12-28 2014-07-10 Axell Corp Content data processing method, content server, client terminal, and content distribution system
JP7232961B1 (en) * 2022-11-01 2023-03-03 太人 田中 Information transmission method and information transmission system

Similar Documents

Publication Publication Date Title
US9742557B2 (en) Compressing encrypted data without the encryption key
JP4893750B2 (en) Data compression apparatus and data decompression apparatus
JP3626502B2 (en) Apparatus and method for encrypting MPEG packets
TW375721B (en) DES chip processor capable of executing data encryption standard (DES) operation
JPH0756831A (en) Method for transmission and reception of program for personal use
CN112491832B (en) File transmission method and device
JPS63135035A (en) Method and apparatus for encoding/decoding
KR100850825B1 (en) Encryption of a compressed video stream
CN108737353B (en) Data encryption method and device based on data analysis system
JPS6129232A (en) Data encipherment transmission system
JP2001142396A (en) Ciphering device, its method, ciphering/deciphering device, its method and communication system
CN108650264B (en) Data transmission method, device, equipment and computer readable storage medium
CN115150134A (en) Intelligent power grid data encryption transmission method and system
EP1032159A2 (en) Method for information encryption and transfer
CN1330353A (en) Information encryption method and system
JP2005160018A (en) Image protection system and method
JPH07245606A (en) Interface converter
JPH0777933A (en) Network data ciphering device
JPH1051778A (en) Coder, decoder, and communication equipment with coder and decoder
JPH10294669A (en) Password communication method with data compression
JP2000236305A (en) System and method for collecting viewing history
JPH0553990A (en) Password ciphering/compositing system using numerical train
JPH09200195A (en) Ciphering communication system
KR100419500B1 (en) Method for transmitting and receiving software image
JP2000078023A (en) Data processing method and data processor