JP2007166568A - Encryption transmission system, transmitter, receiver, transmission method, receiving method, and program - Google Patents

Encryption transmission system, transmitter, receiver, transmission method, receiving method, and program Download PDF

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JP2007166568A
JP2007166568A JP2005380959A JP2005380959A JP2007166568A JP 2007166568 A JP2007166568 A JP 2007166568A JP 2005380959 A JP2005380959 A JP 2005380959A JP 2005380959 A JP2005380959 A JP 2005380959A JP 2007166568 A JP2007166568 A JP 2007166568A
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transmission
dimensional barcode
receiving
reception
secret key
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Takeshi Umeno
健 梅野
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ChaosWare Inc
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ChaosWare Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To solve a difficult problem that it is hard to obtain sharing of a key for performing encrypted transferring between transmitting/receiving devices of distinct types such as a PC and a mobile telephone terminal in conventional encrypted transferring equipments. <P>SOLUTION: A transmitter 101 receives a two-dimensional bar code in a two-dimensional bar code receptionist portion 102, and generates a secret key from the two-dimensional bar code with a secret key formation portion 103. It enciphers a transmission data in an encryption portion 104 with the secret key formed by the secret key formation portion 103, and transmits it as an enciphered data. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、情報を暗号化して復号化するのに好適な暗号伝送システム、送信装置、受信装置、送信方法、受信方法、ならびに、これらをコンピュータ上にて実現するプログラムに関する。  The present invention relates to an encryption transmission system suitable for encrypting and decrypting information, a transmission device, a reception device, a transmission method, a reception method, and a program for realizing these on a computer.

従来技術Conventional technology

従来から、暗号技術の分野においては、情報漏曳を防止するため、種々の技術が提案されている。たとえば、公開鍵暗号と共通鍵暗号の技術を用いて情報を特定の人のみが復号化すること可能にするハイブリッド暗号化方式を用いて、共有ファイルサーバーに情報漏えい防止データを暗号化する技術である。  Conventionally, in the field of cryptographic technology, various technologies have been proposed to prevent information leakage. For example, a technology that encrypts information leakage prevention data in a shared file server using a hybrid encryption method that allows only a specific person to decrypt information using public key cryptography and common key cryptography. is there.

更に、サーバー・クライアント型システムにおいて、クライアント側の暗号化復号化 操作の決裁情報を管理する所謂電子決済システムもある。    Further, there is a so-called electronic settlement system that manages decision information for encryption / decryption operations on the client side in a server / client system.

しかしながら、情報漏曳を防止するための技術は、常に新しいものが求められていることはいうまでもない。また、出張先で携帯電話により撮ったデジタルカメラ画像といった出張先の機密性の高いデータを本社のPCへ送信する際に、暗号化されている方が望ましい。  However, it is needless to say that new techniques are always required for preventing information leakage. Further, when transmitting highly confidential data of a business trip destination such as a digital camera image taken by a mobile phone at a business trip destination, it is desirable that the data is encrypted.

ところで、公知の技術の中では、携帯電話等の送信装置と、PC等で実現する受信装置 といった異なる種類の送受信装置の場合、秘密鍵を共有し、暗号化通信を行うことが困 難であった。  By the way, in the known technology, it is difficult to share a secret key and perform encrypted communication in the case of different types of transmitting and receiving devices such as a transmitting device such as a mobile phone and a receiving device realized by a PC or the like. It was.

本発明は、上記のような課題を解決するものであって、情報を暗号化伝送するのに好適な暗号化伝送システム、送信装置、受信装置、送信方法、受信方法、ならびに、これらをコンピュータ上にて実現するプログラムを提供することを目的とする。  The present invention solves the above-described problems, and is an encrypted transmission system, a transmission device, a reception device, a transmission method, a reception method, and a method suitable for encrypting and transmitting information. The purpose is to provide a program realized by

以上の目的を達成するため、本発明の原理にしたがって、下記の発明を開示する。  In order to achieve the above object, the following invention is disclosed in accordance with the principle of the present invention.

本発明の第1の観点に係る暗号化伝送システムは、送信装置と、受信装置と、を備え、以下のように構成する。  An encrypted transmission system according to a first aspect of the present invention includes a transmission device and a reception device, and is configured as follows.

すなわち、送信装置は、2次元バーコード受付部、秘密鍵生成部、及び、暗号化部、を備える。  That is, the transmission device includes a two-dimensional barcode reception unit, a secret key generation unit, and an encryption unit.

ここで、2次元バーコード受付部は、2次元バーコードを、送信装置に受付る。  Here, the two-dimensional barcode accepting unit accepts the two-dimensional barcode to the transmission device.

秘密鍵生成部は、前記2次元バーコード受付部により受け付けられた2次元バーコードから、1対1に変換することにより、暗号化する際必要な秘密鍵を生成する。  The secret key generating unit generates a secret key necessary for encryption by converting the two-dimensional barcode received by the two-dimensional barcode receiving unit into a one-to-one correspondence.

一方、暗号化部は、前記秘密鍵生成部により生成された秘密鍵により送信データを暗号化する。  On the other hand, the encryption unit encrypts the transmission data with the secret key generated by the secret key generation unit.

受信装置は、2次元バーコード生成部、及び、復号化部を備える。  The receiving device includes a two-dimensional barcode generation unit and a decoding unit.

ここで、2次元バーコード生成部は、受信用秘密鍵から2次元バーコードを1対1の変換により生成する。  Here, the two-dimensional barcode generation unit generates a two-dimensional barcode from the reception private key by one-to-one conversion.

復号化部は、前記受信用秘密鍵により受信データを復号化する。  The decryption unit decrypts the received data with the reception private key.

また、本発明の暗号化伝送システムにおいて、前記送信装置で取得される2次元バーコードは、前記受信装置の2次元バーコード生成部により生成される2次元バーコードと等しいことを特徴とする特徴とすることができる。  In the encrypted transmission system of the present invention, the two-dimensional barcode acquired by the transmission device is equal to the two-dimensional barcode generated by the two-dimensional barcode generation unit of the reception device. It can be.

本発明のその他の観点に係る送信装置は、上記の暗号化伝送システムにおける送信装置である。  A transmission device according to another aspect of the present invention is a transmission device in the encrypted transmission system.

本発明のその他の観点に係る受信装置は、上記の暗号化伝送システムにおける受信装置である。  A receiving apparatus according to another aspect of the present invention is a receiving apparatus in the encrypted transmission system.

本発明のその他の観点に係る送信方法は、上記の送信装置において実行される方法である。  A transmission method according to another aspect of the present invention is a method executed in the transmission device.

本発明のその他の観点に係る受信方法は、上記の受信装置において実行される方法である。  A receiving method according to another aspect of the present invention is a method executed in the above receiving apparatus.

本発明の他の観点に係るプログラムは、コンピュータを、上記の送信装置、もしくは、受信装置として機能させ、コンピュータに、上記の送信方法もしくは受信方法を実行させるように構成する。  A program according to another aspect of the present invention causes a computer to function as the above-described transmission device or reception device, and causes the computer to execute the above-described transmission method or reception method.

当該プログラムは、コンピュータ読取可能な情報記録媒体(コンパクトディスク、フレキシブルディスク、ハードディスク、光磁気ディスク、ディジタルビデオディスク、磁気テープ、または、半導体メモリを含む。)に記録することができる。  The program can be recorded on a computer-readable information recording medium (including a compact disk, flexible disk, hard disk, magneto-optical disk, digital video disk, magnetic tape, or semiconductor memory).

そして、上記の情報記録媒体は、コンピュータとは独立して配布、販売することができるほか、インターネット等のコンピュータ通信網を介して上記のプログラムそのものを配布、販売することができる。  The information recording medium can be distributed and sold independently of the computer, and the program itself can be distributed and sold via a computer communication network such as the Internet.

本発明によれば、情報を暗号化して伝送するのに好適な暗号化伝送システム、送信装置、受信装置、送信方法、受信方法、ならびに、これらをコンピュータ上にて実現するプログラムを提供することができる。  According to the present invention, it is possible to provide an encrypted transmission system, a transmission device, a reception device, a transmission method, a reception method, and a program for realizing these on a computer, which are suitable for encrypting and transmitting information. it can.

以下に本発明の実施形態を説明する。なお、以下にあげる実施形態は、説明のためのものであり、本発明の範囲を制限する物ではない。したがって、当業者であれば、これらの各要素または全要素を、これと均等なものに置換した実施形態を採用することが可能であるが、これらの実施形態も、本発明の範囲に含まれる。  Embodiments of the present invention will be described below. The embodiments described below are for illustrative purposes and do not limit the scope of the present invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced with equivalent ones, and these embodiments are also included in the scope of the present invention. .

図1は、本発明の暗号化伝送システムの送信装置の実施形態の概要構成を示す説明図である。以下、本図を参照して説明する。  FIG. 1 is an explanatory diagram showing a schematic configuration of an embodiment of a transmission device of an encrypted transmission system of the present invention. Hereinafter, a description will be given with reference to FIG.

本図に示す通り、送信装置101は、2次元バーコードを2次元バーコード受付部102で受付け、秘密鍵生成部103で、2次元バーコード受付部102にて受け付けられた2次元バーコードより秘密鍵を生成する。送信データは、秘密鍵生成部103により生成された秘密鍵により、暗号化部104により暗号化され、暗号化済みデータとして送信される。  As shown in the figure, the transmission apparatus 101 receives a two-dimensional barcode by the two-dimensional barcode reception unit 102, and uses the secret key generation unit 103 from the two-dimensional barcode received by the two-dimensional barcode reception unit 102. Generate a secret key. The transmission data is encrypted by the encryption unit 104 using the secret key generated by the secret key generation unit 103 and transmitted as encrypted data.

例えば、2次元バーコードを送信装置と受信装置の共通の秘密鍵と表現するものと見なすことにより、送信装置101によって2次元バーコードを受け付けられた2次元バーコードから1対1変換することにより、秘密鍵生成部103にて生成される秘密鍵は、受信装置で生成される2次元バーコードと前記送信装置で受け付けられた2次元バーコードと等しい場合、共有され、暗号化通信が可能となる。  For example, by assuming that a two-dimensional barcode is expressed as a common secret key for the transmission device and the reception device, the transmission device 101 converts the two-dimensional barcode from the received two-dimensional barcode one-to-one. When the secret key generated by the secret key generation unit 103 is equal to the two-dimensional barcode generated by the receiving device and the two-dimensional barcode received by the transmitting device, the secret key is shared and encrypted communication is possible. Become.

又、暗号化部104で送信データを暗号化する際、メモリ上に、元のデータを完全に消滅させることができる。この場合、情報保護の観点から不要なデータを消滅させるという点で安全性を高めることになる。  In addition, when the transmission data is encrypted by the encryption unit 104, the original data can be completely erased on the memory. In this case, safety is enhanced in that unnecessary data is eliminated from the viewpoint of information protection.

図2は、本発明の暗号化伝送システムの受信装置の実施形態の概要構成を示す説明図である。以下、本図を参照して説明する。  FIG. 2 is an explanatory diagram showing a schematic configuration of an embodiment of the receiving apparatus of the encrypted transmission system of the present invention. Hereinafter, a description will be given with reference to FIG.

本図に示す通り、受信装置201は、2次元バーコード生成部202、復号化部203、から構成され、2次元バーコード生成部202で、受信用秘密鍵から1対1変換することにより2次元バーコードを生成し出力し、復号化部203で、受信データを、前記受信用秘密鍵で復号化する。As shown in the figure, the receiving device 201 is composed of a two-dimensional barcode generation unit 202 and a decryption unit 203, and the two-dimensional barcode generation unit 202 performs one-to-one conversion from the reception private key to 2 A dimensional barcode is generated and output, and the decryption unit 203 decrypts the received data with the reception private key.

この場合、前記受信用秘密鍵は、受信装置102に予め登録してある送信装置101の固有の番号を用いて生成されるようにすることができる。例えば、送信装置が携帯電話端末である場合、携帯電話端末の端末番号を固有の番号として用いることができる。  In this case, the reception private key can be generated using a unique number of the transmission apparatus 101 registered in advance in the reception apparatus 102. For example, when the transmission device is a mobile phone terminal, the terminal number of the mobile phone terminal can be used as a unique number.

また、前記受信用秘密鍵は、受信装置を起動する毎に毎回異なる様にすることができる。この場合、2次元バーコード生成部202で生成される2次元バーコードがそれに伴い、毎回異なる様になり、鍵管理の安全性が高まる。    Further, the reception private key can be made different every time the receiving apparatus is activated. In this case, the two-dimensional barcode generated by the two-dimensional barcode generation unit 202 becomes different each time, and the security of key management is increased.

送信装置101をカメラ付き携帯電話端末とする場合、2次元バーコードを読み取れる機種があり、携帯電話端末上で、紙媒体等に印刷された2次元バーコードをカメラで読み取ることができ、秘密鍵を取得することができる。 この場合、携帯電話端末のカメラで撮影した送信データを携帯電話のメモリバッファ上でダイレクトに暗号化することにより、生の写真データが保存されなく完全に消滅する様になる。  When the transmission device 101 is a mobile phone terminal with a camera, there are models that can read a two-dimensional barcode, and the two-dimensional barcode printed on a paper medium or the like can be read by the camera on the mobile phone terminal, and a secret key Can be obtained. In this case, the transmission data captured by the camera of the mobile phone terminal is directly encrypted on the memory buffer of the mobile phone, so that the raw photo data is not stored and is completely lost.

以上説明したように、本発明によれば、情報を暗号化して伝送するのに好適な暗号化伝送システム、送信装置、受信装置、送信方法、受信方法、ならびに、これらをコンピュータ上にて実現するプログラムを提供することができ、暗号通信の分野に適用することができる。  As described above, according to the present invention, an encrypted transmission system, a transmission device, a reception device, a transmission method, a reception method suitable for encrypting and transmitting information, and these are realized on a computer. A program can be provided and applied to the field of cryptographic communication.

本発明の実施形態に係る暗号化伝送システムの送信装置の概要構成を示す模式図である。  It is a schematic diagram which shows schematic structure of the transmitter of the encryption transmission system which concerns on embodiment of this invention. 暗号化伝送システムの受信装置の概要構成を示す模式図である。  It is a schematic diagram which shows schematic structure of the receiver of an encryption transmission system.

符号の説明Explanation of symbols

101 送信装置
102 2次元バーコード受付部
103 秘密鍵生成部
104 暗号化部
201 受信装置
202 2次元バーコード生成部
203 復号化部
DESCRIPTION OF SYMBOLS 101 Transmission apparatus 102 Two-dimensional barcode reception part 103 Secret key generation part 104 Encryption part 201 Reception apparatus 202 Two-dimensional barcode generation part 203 Decryption part

Claims (14)

送信装置と、受信装置と、を備える暗号伝送システムであって、
(a)前記送信装置は、
2次元バーコードを取得する2次元バーコード受付部、前記取得された2次元バーコードから、秘密鍵を生成する秘密鍵生成部、
前記秘密鍵生成部により生成された秘密鍵から、送信データを暗号化する
暗号化部
を備え、
(b)前記受信装置は、
受信用秘密鍵から2次元バーコードを生成する2次元バーコード生成部、
当該受信用秘密鍵から受信データを復号化する復号化部
を備える
ことを特徴とする物。
An encryption transmission system comprising a transmission device and a reception device,
(A) The transmission device includes:
A two-dimensional barcode receiving unit for acquiring a two-dimensional barcode, a secret key generating unit for generating a secret key from the acquired two-dimensional barcode,
An encryption unit for encrypting transmission data from the secret key generated by the secret key generation unit;
(B) The receiving device
A two-dimensional barcode generation unit for generating a two-dimensional barcode from the reception private key;
A device comprising a decryption unit for decrypting received data from the reception private key.
請求項1に記載の暗号伝送システムであって、
前記送信装置で取得される2次元バーコードは、前記受信装置の2次元バーコード生成部により生成される2次元バーコードと等しいことを特徴とする物。
The cryptographic transmission system according to claim 1,
The two-dimensional barcode acquired by the transmitter is equal to the two-dimensional barcode generated by the two-dimensional barcode generator of the receiver.
請求項1に記載の暗号伝送システムであって、
前記受信装置で復号用に用いられる前記受信用秘密鍵は、
前期受信装置に予め登録してある前記送信装置の固有番号を
用いて生成される
ことを特徴とする物。
The cryptographic transmission system according to claim 1,
The reception private key used for decryption in the reception device is:
It is generated using the unique number of the transmitting device registered in advance in the receiving device in the previous period.
請求項1に記載の暗号伝送システムであって、
前記受信装置で復号用に用いられる前記受信用秘密鍵は、
前記受信装置が起動する毎に、毎回異なる
ことを特徴とする物。
The cryptographic transmission system according to claim 1,
The reception private key used for decryption in the reception device is:
What is different every time the receiving device is activated.
請求項1に記載の暗号伝送システムであって、
前記送信装置は、前記送信データを暗号化した後、前記送信データをメモリ上から
消滅させる
ことを特徴とする物。
The cryptographic transmission system according to claim 1,
The transmission device encrypts the transmission data and then deletes the transmission data from the memory.
請求項1から5のいずれか1項に記載の暗号伝送システムにおける送信装置。  The transmission apparatus in the encryption transmission system of any one of Claim 1 to 5. 請求項1から5のいずれか1項に記載の暗号伝送システムにおける受信装置。  The receiving apparatus in the encryption transmission system of any one of Claim 1 to 5. 受信装置と通信する送信装置にて実行される送信方法であって、
2次元バーコードを取得する2次元バーコード受付工程、
前記取得された2次元バーコードから、これに対応する秘密鍵を生成する秘密鍵生成工程、
前記秘密鍵により送信データを暗号化する
暗号化工程
を備えることを特徴とする方法。
A transmission method executed by a transmission device communicating with a reception device,
A two-dimensional barcode receiving process for obtaining a two-dimensional barcode;
A secret key generation step of generating a secret key corresponding to the acquired two-dimensional barcode;
An encryption step of encrypting transmission data with the secret key.
請求項8に記載の送信方法であって、
前記暗号化工程では、送信データを暗号化した後、前記送信データをメモリ上から
消滅させる
ことを特徴とする方法。
The transmission method according to claim 8, comprising:
In the encryption step, after the transmission data is encrypted, the transmission data is erased from the memory.
請求項8に記載の送信方法であって、
前記送信工程では、暗号化済みデータを、第三者がアクセス可能なサーバ装置にアップロードすることによって、前記送信工程における送信が行われる
ことを特徴とする方法
The transmission method according to claim 8, comprising:
In the transmission step, the transmission in the transmission step is performed by uploading the encrypted data to a server device accessible by a third party.
送信装置と通信する受信装置にて実行される受信方法であって、
受信用秘密鍵から2次元バーコードを生成する2次元バーコード生成工程、当該受信用秘密鍵により受信データを復号化する復号化工程を備える
ことを特徴とする方法。
A receiving method executed by a receiving device communicating with a transmitting device,
A method comprising: a two-dimensional barcode generation step of generating a two-dimensional barcode from a reception private key; and a decryption step of decoding received data using the reception private key.
請求項11に記載の受信方法であって、
前記受信工程は、前記サーバ装置にアップロードされた送信側暗号済みデータをダウンロードすることによって、前記受信工程における受信が行われる
ことを特徴とする方法。
The receiving method according to claim 11, comprising:
The receiving step includes receiving data in the receiving step by downloading the transmission side encrypted data uploaded to the server device.
コンピュータを、請求項6に記載の送信装置として機能させることを特徴とするプログラム。  A program causing a computer to function as the transmission device according to claim 6. コンピュータを、請求項7に記載の受信装置として機能させることを特徴とするプログラム。  A program causing a computer to function as the receiving device according to claim 7.
JP2005380959A 2005-12-14 2005-12-14 Encryption transmission system, transmitter, receiver, transmission method, receiving method, and program Pending JP2007166568A (en)

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