JP2000151578A5

JP2000151578A5 -

Info

Publication number: JP2000151578A5
Application number: JP1998318605A
Authority: JP
Filing date: 1998-11-10
Publication date: 2005-07-28

Description

第５の発明による暗号通信装置は、第１の発明から第４の発明において、上記暗号化手段は、上記復号化された情報に基づいて利用料金を計算し、上記復号化された情報の有する所持金とこの計算された利用料金との差から新たな所持金を計算し、この計算された所持金と当該情報処理装置に固有の情報とから上記選択手段で選択された鍵を用いて、上記選択手段で選択されたアルゴリズムで新たに暗号文を生成する手段を備えたものである。
また、第６の発明による暗号通信装置は、移動体と双方向通信を行う暗号通信装置において、異なる複数の暗号アルゴリズム及び当該それぞれの暗号アルゴリズムを識別する暗号アルゴリズム識別子と異なる複数の暗号鍵及び当該それぞれの暗号鍵を識別する鍵識別子とを格納する記憶手段と、上記移動体から受信した暗号アルゴリズム識別子及び鍵識別子に基づいて、上記記憶手段から対応する暗号アルゴリズム及び対応する暗号鍵を選択する選択手段と、上記選択手段で選択された暗号鍵を用いて、上記選択された暗号アルゴリズムにて上記移動体から受信した暗号文を復号する復号化手段と、を備えたものである。
また、第７の発明による暗号通信装置は、複数の移動体と双方向通信する暗号通信装置において、移動体から送信された暗号文、暗号アルゴリズム識別子、及び鍵識別子を受信する手段と、上記移動体が個々に有する暗号アルゴリズム識別子にそれぞれ対応した異なる複数のアルゴリズム、及び上記移動体が個々に有する鍵識別子にそれぞれ対応した異なる複数の鍵を格納する記憶手段と、上記第２の記憶手段に格納された複数のアルゴリズムから受信された暗号アルゴリズム識別子に対応するアルゴリズムを選択する手段、及び上記記憶手段に記憶された複数の鍵から受信された暗号アルゴリズム識別子に対応する鍵を選択する手段を有する選択手段と、上記選択手段で選択された鍵を用いて、上記選択手段で選択されたアルゴリズムで受信された暗号文を復号化する復号化手段と、上記復号化手段で復号化された情報に基づいて処理された処理情報と上記選択手段で選択された鍵を用いて、上記選択手段で選択されたアルゴリズムで新たに暗号文を生成する暗号化手段と、上記暗号化手段で生成された暗号文を移動体へ向けて送信する手段と、を具備したものである。 In the encrypted communication device according to the fifth invention, in the first to fourth inventions, the encryption means calculates the usage fee based on the decrypted information and has the decrypted information. A new possession money is calculated from the difference between the possession money and the calculated usage fee, and the key selected by the above selection means from the calculated possession money and the information peculiar to the information processing device is used. It is provided with a means for newly generating a ciphertext by the algorithm selected by the above selection means.
Further, the cryptographic communication device according to the sixth invention is a cryptographic communication device that performs two-way communication with a mobile body, and includes a plurality of different cryptographic algorithms, a plurality of cryptographic keys different from the cryptographic algorithm identifiers that identify the respective cryptographic algorithms, and the said. A storage means for storing a key identifier for identifying each encryption key, and a selection for selecting a corresponding encryption algorithm and a corresponding encryption key from the storage means based on the encryption algorithm identifier and the key identifier received from the mobile body. It is provided with a means and a decryption means for decrypting a cipher sentence received from the moving body by the selected cryptographic algorithm using the encryption key selected by the selection means.
Further, the cryptographic communication device according to the seventh invention is a cryptographic communication device that bidirectionally communicates with a plurality of mobile bodies, and is a means for receiving a cryptographic text, a cryptographic algorithm identifier, and a key identifier transmitted from the mobile body, and the above-mentioned movement. A plurality of different algorithms corresponding to the cryptographic algorithm identifiers individually possessed by the body, a storage means for storing a plurality of different keys corresponding to the key identifiers individually possessed by the mobile body, and a storage means for storing the different keys corresponding to the key identifiers individually possessed by the moving body, and the second storage means. A selection having a means for selecting an algorithm corresponding to a cryptographic algorithm identifier received from a plurality of cryptographic algorithms received, and a means for selecting a key corresponding to a cryptographic algorithm identifier received from a plurality of keys stored in the storage means. Based on the means, the decryption means for decrypting the encrypted text received by the algorithm selected by the selection means using the key selected by the selection means, and the information decrypted by the decryption means. An encryption means for generating a new cipher by the algorithm selected by the selection means using the processing information processed by the above and the key selected by the selection means, and an encryption means generated by the above-mentioned encryption means. Is provided with a means for transmitting the image to the moving body.

また、第４の発明によれば、移動体が具備する移動体識別子を情報処理装置が認識することで、移動体がシステムで決められた複数の暗号アルゴリズムの何れで処理しても、かつ、移動体がシステムで決められた複数の暗号鍵／復号鍵の何れで処理しても、移動体と情報処理装置において暗号処理が可能な方式を提供することができる。Further, according to the fourth invention, the information processing apparatus recognizes the mobile identifier included in the mobile so that the mobile can be processed by any of a plurality of cryptographic algorithms determined by the system. Regardless of whether the mobile body is processed by a plurality of encryption keys / decryption keys determined by the system, it is possible to provide a method capable of encryption processing in the mobile body and the information processing device.
また、第６、第７の発明によれば、複数の暗号アルゴリズム及び暗号鍵を備えることにより、暗号アルゴリズムと暗号鍵が１つに固定される場合に比べて、通信情報の秘匿性をより向上させることができる。Further, according to the sixth and seventh inventions, by providing a plurality of encryption algorithms and encryption keys, the confidentiality of communication information is further improved as compared with the case where the encryption algorithm and the encryption key are fixed to one. Can be made to.

Claims

In an encryption communication device composed of an information processing device and a plurality of mobile bodies that perform bidirectional communication with the information processing device,
The mobile unit receives a ciphertext transmitted from the information processing apparatus, stores a unique cipher algorithm identifier and a key identifier, and a first storage unit that stores the received ciphertext. Means for transmitting the cryptographic algorithm identifier, key identifier and ciphertext stored in the first storage means to the information processing apparatus together when the position with the information processing apparatus reaches a predetermined position; The information processing apparatus has a means for receiving a ciphertext, an encryption algorithm identifier, and a key identifier transmitted from the mobile body at the predetermined position, and corresponds to the encryption algorithm identifier that the mobile body individually has. A second storage means for storing a plurality of different algorithms and a plurality of different keys respectively corresponding to key identifiers individually possessed by the mobile unit; Means for selecting an algorithm corresponding to an encryption algorithm identifier received from a plurality of algorithms stored in the storage means, and corresponds to an encryption algorithm identifier received from a plurality of keys stored in the second storage means A selection unit having a unit for selecting a key; a decryption unit for decrypting a ciphertext received by the algorithm selected by the selection unit using the key selected by the selection unit; and the decryption unit Using the processing information processed based on the information decrypted in step 1 and the key selected by the selection means, an encryption means for newly generating a ciphertext with the algorithm selected by the selection means, and the encryption And a means for transmitting the ciphertext generated by the converting means to the mobile body at the predetermined position.

In an encryption communication device composed of an information processing device and a plurality of mobile bodies that perform bidirectional communication with the information processing device,
The mobile unit stores a ciphertext transmitted from the information processing apparatus, a plurality of unique different cryptographic algorithm identifiers and a plurality of different key identifiers, and stores the received ciphertext. When the position of the first storage means and the information processing apparatus reaches a predetermined position, the encryption algorithm identifier and key identifier stored in the first storage means and the first storage means Means for transmitting both ciphertexts to the information processing apparatus, wherein the information processing apparatus receives ciphertexts, cipher algorithm identifiers, and key identifiers transmitted from the mobile body at the predetermined position. A plurality of different algorithms respectively corresponding to the encryption algorithm identifiers individually possessed by the mobile unit, and key identifiers individually possessed by the mobile unit. Second storage means for storing a plurality of different keys, means for selecting an algorithm corresponding to an encryption algorithm identifier received from the plurality of algorithms stored in the second storage means, and storage in the storage means A selection means having means for selecting a key corresponding to the encryption algorithm identifier received from the plurality of keys received, and the algorithm selected by the selection means using the key selected by the selection means. Selected by the selection means using the decryption means for decrypting the encrypted text, the processing information processed based on the information decrypted by the decryption means, and the key selected by the selection means An encryption unit that newly generates a ciphertext using an algorithm; and a unit that transmits the ciphertext generated by the encryption unit to the mobile body at the predetermined position. Encryption communication device, characterized in that the.

The selecting means of the information processing apparatus includes means for changing the received encryption identifier or key identifier, and the received encryption algorithm identifier or the changed encryption algorithm from a plurality of algorithms stored in the second storage means. Means for selecting an algorithm corresponding to one of the algorithm identifiers, and a key corresponding to one of the received key identifier or the changed key identifier from a plurality of keys stored in the storage means Means for transmitting the received encryption algorithm identifier and the key identifier together with the ciphertext generated by the encryption means to the mobile body at the predetermined position. The encryption communication device according to claim 1, further comprising:

In an encryption communication device composed of an information processing device and a plurality of mobile bodies that perform bidirectional communication with the information processing device,
The mobile unit stores a ciphertext transmitted from the information processing apparatus, a unique mobile unit identifier, a first storage unit that stores the received ciphertext, and the information Means for transmitting both the mobile identifier and ciphertext stored in the first storage means to the information processing apparatus when the position with the processing apparatus reaches a predetermined position, The apparatus includes a means for receiving a ciphertext and a mobile object identifier transmitted from the mobile object at the predetermined position, a plurality of different algorithms respectively corresponding to the mobile object identifiers of the mobile object, and the mobile object Second storage means for storing a plurality of different keys respectively corresponding to mobile object identifiers individually possessed by the mobile body, and mobile object identification received from a plurality of algorithms stored in the second storage means Selected by the selection means, and means for selecting an algorithm corresponding to the mobile object identifier received from the plurality of keys stored in the second storage means; The decryption means for decrypting the ciphertext from the mobile object using the key selected by the selection means, the information processed based on the information decrypted by the decryption means, and the above An encryption unit that newly generates a ciphertext using the algorithm selected by the selection unit using the key selected by the selection unit, and a mobile unit that has the ciphertext generated by the encryption unit at the predetermined position And a means for transmitting to the encryption communication device.

The encryption means calculates a usage fee based on the decrypted information, calculates a new money from the difference between the money possessed by the decrypted information and the calculated usage fee, A means for newly generating a ciphertext with the algorithm selected by the selection means using the key selected by the selection means from the calculated money and information specific to the information processing apparatus is provided. The encryption communication device according to claim 1, wherein:

In a cryptographic communication device that performs bidirectional communication with a mobile unit,
Storage means for storing a plurality of different encryption algorithms and encryption algorithm identifiers for identifying the respective encryption algorithms, and a plurality of different encryption keys and key identifiers for identifying the respective encryption keys;
Selection means for selecting a corresponding encryption algorithm and corresponding encryption key from the storage means based on the encryption algorithm identifier and key identifier received from the mobile;
Decryption means for decrypting the ciphertext received from the mobile object with the selected encryption algorithm using the encryption key selected by the selection means;
An encryption communication device comprising:

In an encryption communication device that performs bidirectional communication with a plurality of mobile objects,
Means for receiving a ciphertext, a cryptographic algorithm identifier, and a key identifier transmitted from a mobile;
Storage means for storing a plurality of different algorithms respectively corresponding to encryption algorithm identifiers individually possessed by the mobile body, and a plurality of different keys respectively corresponding to key identifiers individually possessed by the mobile body;
Means for selecting an algorithm corresponding to a cryptographic algorithm identifier received from a plurality of algorithms stored in the second storage means, and corresponding to a cryptographic algorithm identifier received from a plurality of keys stored in the storage means Selecting means having means for selecting a key;
Decryption means for decrypting the ciphertext received by the algorithm selected by the selection means, using the key selected by the selection means;
Encryption means for newly generating a ciphertext with the algorithm selected by the selection means, using the processing information processed based on the information decrypted by the decryption means and the key selected by the selection means When,
Means for transmitting the ciphertext generated by the encryption means to the mobile body;
An encryption communication device comprising: