JP2007166538A - Communication equipment, its control method, and communication system - Google Patents

Communication equipment, its control method, and communication system Download PDF

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JP2007166538A
JP2007166538A JP2005363860A JP2005363860A JP2007166538A JP 2007166538 A JP2007166538 A JP 2007166538A JP 2005363860 A JP2005363860 A JP 2005363860A JP 2005363860 A JP2005363860 A JP 2005363860A JP 2007166538 A JP2007166538 A JP 2007166538A
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communication
communication device
encryption
encryption method
information
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JP4702944B2 (en
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Mitsuru Otsuka
充 大塚
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Canon Inc
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Canon Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To secure the security of communication in a communication system constituted of first communication equipment having a plurality of communication systems and second communication equipment having a plurality of communication systems. <P>SOLUTION: Communication equipment 1 acquires communication information showing a communication system and an encryption system from communication equipment 2 by a predetermined short range communication system (S201, S202). The acquired communication information is compared with a communication information table owned by the communication equipment 1, and whether or not there is any matched communication information is decided (S203). When it is decided that there is any matched communication information, data communication is operated between the communication equipment 1 and the communication equipment 2 by the communication system and encryption system corresponding to the communication information (S204-S207). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、たとえば近距離無線通信方式を含む複数の通信方式を持つ通信装置に関する。   The present invention relates to a communication apparatus having a plurality of communication systems including, for example, a short-range wireless communication system.

従来、複数の通信方式を切り替えて通信を行う通信装置があった。この種の通信装置において、複数の通信方式のそれぞれに通信可能かを確認してから通信方式を選択するものがある（例えば、特許文献１等参照）。また、非接触ＩＣインターフェースのような近距離無線通信方式を使用して通信先の端末が対応するプロトコル一覧を取得する通信装置がある。この通信装置は、そのプロトコルに自端末が対応しているときに試し通信を行い、成功した場合にそのプロトコルで通信を行う（例えば、特許文献２等参照）。また、非接触ＩＣインターフェースのような近距離無線通信方式を使用して、Bluetooth（登録商標）通信で同期を確立する端末の情報を交換するものがある（例えば、特許文献３または特許文献４または特許文献５等参照）。また、情報通信網の通信セキュリティにおいて、通信の対象となる情報にセキュリティレベルを設定し、通信相手のセキュリティレベルが通信の対象となる情報のセキュリティレベル以上の場合に限って通信を行う通信装置がある（例えば、特許文献６等参照）。
特開２００３−８６８１号公報 特開２００３−１９８５６８号公報 特開２００３−３２１７５号公報 特開２００３−３２１７６号公報 特開２００３−３２２６１号公報 特開平０６−２４４８３３号公報 Conventionally, there has been a communication apparatus that performs communication by switching a plurality of communication methods. Some communication apparatuses of this type select a communication method after confirming whether communication is possible with each of a plurality of communication methods (see, for example, Patent Document 1). There is also a communication device that acquires a list of protocols supported by a communication destination terminal using a short-range wireless communication method such as a non-contact IC interface. This communication device performs trial communication when the terminal supports the protocol, and performs communication using the protocol when successful (see, for example, Patent Document 2). In addition, there is one that exchanges information of a terminal that establishes synchronization by Bluetooth (registered trademark) communication using a short-range wireless communication method such as a non-contact IC interface (for example, Patent Document 3 or Patent Document 4 or (See Patent Document 5, etc.). Also, in communication security of information communication networks, a communication device that sets a security level for information to be communicated and performs communication only when the security level of the communication partner is equal to or higher than the security level of the information to be communicated. Yes (see, for example, Patent Document 6).
JP 2003-8861 A JP 2003-198568 A JP 2003-32175 A JP 2003-32176 A JP 2003-32261 A Japanese Patent Laid-Open No. 06-244833

上述した従来の技術では以下のような問題があった。すなわち、複数の通信方式を切り替える場合に、それぞれの通信方式が通信可能かを確認したり、試し通信を行ったりすることによって通信方式を決定するのでは、通信のセキュリティが確保されていることを確認することができない。複数の無線通信方式を備え、第一の無線通信方式の情報を第二の無線通信方式によって取得するのでは、第二の無線通信方式による通信が行えない場合に代替となる通信手段がない。通信の対象となる情報にセキュリティレベルを設定して通信相手のセキュリティレベルが通信の対象となる情報のセキュリティレベル以上の場合に限って通信を行うのでは、セキュリティが確保されない場合に代替となる通信手段がない。   The conventional technology described above has the following problems. In other words, when switching between multiple communication methods, confirming whether each communication method is communicable, or determining the communication method by performing trial communication, ensures that communication security is ensured. I can't confirm. By providing a plurality of wireless communication methods and acquiring information of the first wireless communication method by the second wireless communication method, there is no alternative communication means when communication by the second wireless communication method cannot be performed. If the security level is set for the information to be communicated and communication is performed only when the security level of the communication partner is equal to or higher than the security level of the information to be communicated, communication is an alternative when security is not ensured. There is no means.

本発明は上記従来例に鑑みてなされたもので、通信の機密性を確保しつつ通信方式及び暗号化方式に関する情報を取得可能な通信装置及びその制御方法及び通信システムを提供することを目的とする。また、取得した通信方式にしたがって通信を行う場合でも、通信の機密性を確保できる通信装置及びその制御方法及び通信システムを提供することを目的とする。また、取得した通信方式で通信を行えない場合でも、確実に通信を行えしかも通信の機密性を確保できる通信装置及びその制御方法及び通信システムを提供することを目的とする。   The present invention has been made in view of the above-described conventional example, and an object thereof is to provide a communication device capable of acquiring information on a communication method and an encryption method while ensuring confidentiality of communication, a control method thereof, and a communication system. To do. It is another object of the present invention to provide a communication device, a control method therefor, and a communication system that can ensure confidentiality of communication even when communication is performed according to the acquired communication method. It is another object of the present invention to provide a communication device, a control method for the communication device, and a communication system that can reliably perform communication even when communication cannot be performed using the acquired communication method.

上記課題を解決するため、本出願に係る発明は以下の構成を備える。すなわち、複数の通信方式を持つ他の通信装置と通信可能な通信装置であって、
第１の通信方式に従って無線通信する第１の通信手段と、
第２の通信方式および暗号化方式に従って無線通信する第２の通信手段と、
前記第１の通信手段を用いた通信により、前記他の通信装置の通信方式および暗号化方式を取得する方式取得手段と、
前記方式取得手段により取得された前記他の通信装置の通信方式および暗号化方式が、前記第２の通信手段の通信方式および暗号化方式に合致するか否かを判定する判定手段と、
前記判定手段により合致すると判定された場合は、前記第２の通信手段により前記第２の通信方式及び前記暗号化方式に従って前記他の通信装置と通信を行い、合致しないと判定された場合には、前記第１の通信手段により前記第１の通信方式に従って前記他の通信装置と通信を行う通信制御手段とを備えることを特徴とする。 In order to solve the above problems, an invention according to the present application has the following configuration. That is, a communication device capable of communicating with other communication devices having a plurality of communication methods,
First communication means for wireless communication according to a first communication method;
A second communication means for performing wireless communication according to the second communication method and the encryption method;
A method acquisition unit that acquires a communication method and an encryption method of the other communication device by communication using the first communication unit;
A determination unit that determines whether a communication method and an encryption method of the other communication device acquired by the method acquisition unit match a communication method and an encryption method of the second communication unit;
If it is determined by the determination means that the data matches, the second communication means communicates with the other communication device according to the second communication method and the encryption method, and if it is determined that they do not match And a communication control means for communicating with the other communication device in accordance with the first communication method by the first communication means.

あるいは、複数の通信方式を持つ他の通信装置と通信可能な通信装置であって、
第１の通信方式に従って無線通信する第１の通信手段と、
第２の通信方式および暗号化方式に従って無線通信する第２の通信手段と、
前記第１の通信手段を用いた通信により、前記他の通信装置から受信した通信方式および暗号化方式の要求に対して、前記第２の通信方式及び暗号化方式を応答する応答手段と、
前記応答手段による応答後、前記他の通信装置により前記第１の通信方式で通信が開始されれば前記第１の通信手段により通信を行い、前記他の通信装置により前記第２の通信方式で通信が開始されれば前記第２の通信手段により通信を行通信制御手段とを備えることを特徴とする。 Alternatively, a communication device capable of communicating with other communication devices having a plurality of communication methods,
First communication means for wireless communication according to a first communication method;
A second communication means for performing wireless communication according to the second communication method and the encryption method;
Response means for responding to the request for the communication method and the encryption method received from the other communication device by communication using the first communication means, and responding to the second communication method and the encryption method;
After communication by the response means, if communication is started by the other communication device in the first communication method, communication is performed by the first communication device, and by the second communication device by the second communication method. When communication is started, the second communication means performs communication with row communication control means.

本発明によれば、通信の機密性を確保しつつ通信方式及び暗号化方式に関する情報を取得可能である。また、取得した通信方式にしたがって通信を行う場合でも、通信の機密性を確保できる。また、取得した通信方式で通信を行えない場合でも、確実に通信を行えしかも通信の機密性を確保できるという効果を奏する。   According to the present invention, it is possible to acquire information relating to a communication method and an encryption method while ensuring confidentiality of communication. Even when communication is performed according to the acquired communication method, confidentiality of communication can be ensured. In addition, even when communication cannot be performed using the acquired communication method, there is an effect that communication can be performed reliably and communication confidentiality can be ensured.

［第１の実施形態］
＜通信システムの構成＞
図１は、本発明の第１の実施形態に係る通信装置の構成を示す図である。通信システム全体は通信装置１及び通信装置２により構成されている。通信装置１は通信手段としてＮＦＣインターフェースおよびＩＥＥＥ８０２．１１ｂインターフェースを持つ。通信装置２は、通信手段としてＮＦＣインターフェース、およびＩＥＥＥ８０２．１１ａインターフェースおよびＩＥＥＥ８０２．１１ｂインターフェースを持つ。詳しくは以下の通りである。 [First Embodiment]
<Configuration of communication system>
FIG. 1 is a diagram showing a configuration of a communication apparatus according to the first embodiment of the present invention. The entire communication system includes a communication device 1 and a communication device 2. The communication device 1 has an NFC interface and an IEEE802.11b interface as communication means. The communication device 2 has an NFC interface, an IEEE802.11a interface, and an IEEE802.11b interface as communication means. Details are as follows.

通信装置１において、ＣＰＵ１０１は装置全体の動作を制御する。ＲＯＭ１０２にはＣＰＵ１０１により実行される制御プログラム等が格納されている。また、ＲＯＭ１０２には、図５等で説明する通信情報テーブル５０１が格納されている。通信情報テーブルには、当該装置がサポートする通信方式及び暗号化方式を表すパラメータが格納されている。ＲＡＭ１０３には制御データが格納される。ＮＦＣインターフェース１０４は、近距離でのみ通信可能な電磁界を発生させることにより通信を行う。ＩＥＥＥ８０２．１１ｂインターフェース１０５は、無線ＬＡＮ（ローカルエリアネットワーク）規格の一つである。これら構成要素は、バス１０６で接続されている。ＮＦＣインターフェースの代表的なものには、特許文献２、特許文献３、特許文献４、特許文献５で使用されているような非接触ＩＣカードとリーダライタの組み合わせによって構成される非接触ＩＣインターフェースがある。なおＮＦＣインターフェースは、ＩＳＯ／ＩＥＣ ＩＳ １８０９２という国際規格である。   In the communication device 1, the CPU 101 controls the operation of the entire device. The ROM 102 stores a control program executed by the CPU 101 and the like. The ROM 102 stores a communication information table 501 described with reference to FIG. The communication information table stores parameters indicating the communication method and encryption method supported by the device. The RAM 103 stores control data. The NFC interface 104 performs communication by generating an electromagnetic field that can be communicated only at a short distance. The IEEE 802.11b interface 105 is one of wireless LAN (local area network) standards. These components are connected by a bus 106. A typical NFC interface is a non-contact IC interface configured by a combination of a non-contact IC card and a reader / writer as used in Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5. is there. The NFC interface is an international standard called ISO / IEC IS 18092.

通信装置２において、ＣＰＵ１０７は装置全体の動作を制御する。ＲＯＭ１０８にはＣＰＵ１０７により実行される制御プログラム等が格納されている。また、ＲＯＭ１０８には、図５等で説明する通信情報テーブル５０１及び５０２が格納されている。ＲＡＭ１０９には制御データが格納される。ＮＦＣインターフェース１１０は、近距離でのみ通信可能な電磁界を発生させることにより通信を行う。ＩＥＥＥ８０２．１１ａインターフェース１１１は、無線ＬＡＮ（ローカルエリアネットワーク）規格の一つである。ＩＥＥＥ８０２．１１ｂインターフェース１１２は、無線ＬＡＮ（ローカルエリアネットワーク）規格の一つである。これら構成要素は、バス１１３で接続されている。   In the communication device 2, the CPU 107 controls the operation of the entire device. The ROM 108 stores a control program executed by the CPU 107 and the like. The ROM 108 stores communication information tables 501 and 502 described with reference to FIG. The RAM 109 stores control data. The NFC interface 110 performs communication by generating an electromagnetic field that can be communicated only at a short distance. The IEEE 802.11a interface 111 is one of wireless LAN (local area network) standards. The IEEE 802.11b interface 112 is one of wireless LAN (local area network) standards. These components are connected by a bus 113.

無線ＬＡＮ規格のＩＥＥＥ８０２．１１ａ、ＩＥＥＥ８０２．１１ｂは、通信を暗号化することにより通信のセキュリティを確保することが可能な通信方式である。通信装置１のＮＦＣインターフェース１０４と通信装置２のＮＦＣインターフェース１１０を使用して、通信装置１は通信装置２に実装されている通信インターフェースの通信方式および暗号化方式を取得する。   The wireless LAN standards IEEE802.11a and IEEE802.11b are communication systems capable of ensuring communication security by encrypting communication. Using the NFC interface 104 of the communication device 1 and the NFC interface 110 of the communication device 2, the communication device 1 acquires the communication method and the encryption method of the communication interface implemented in the communication device 2.

＜通信手順＞
図２および図３は、通信装置１が通信装置２に実装されている通信インターフェースの通信方式および暗号化方式を取得してデータ通信を行う際の動作シーケンスである。図２は、通信方式および暗号化方式取得の結果ＩＥＥＥ８０２．１１ｂで通信を行う際の手順を示す。図３は、通信方式および暗号化方式取得の結果ＮＦＣで通信を行う際の手順を示す。 <Communication procedure>
FIGS. 2 and 3 are operation sequences when the communication device 1 acquires the communication method and encryption method of the communication interface implemented in the communication device 2 and performs data communication. FIG. 2 shows a procedure for performing communication with IEEE802.11b as a result of obtaining the communication method and the encryption method. FIG. 3 shows a procedure for performing communication by NFC as a result of obtaining the communication method and the encryption method.

図２において、通信装置１を通信装置２へ近づけることによりＮＦＣインターフェース１０４と１１０との間で通信が開始される（ステップＳ２００）。通信方式および暗号化方式を要求するメッセージが通信装置１から通信装置２へ送信される（ステップＳ２０１）。その応答として、通信装置２に実装されている通信インターフェースの通信方式および暗号化方式が通信装置２から通信装置１へ送信される（ステップＳ２０２）。通信方式および暗号化方式のデータ例は図４、図５、図６を使用して後述する。   In FIG. 2, communication is started between the NFC interfaces 104 and 110 by bringing the communication device 1 closer to the communication device 2 (step S200). A message requesting the communication method and the encryption method is transmitted from the communication device 1 to the communication device 2 (step S201). As a response, the communication method and the encryption method of the communication interface implemented in the communication device 2 are transmitted from the communication device 2 to the communication device 1 (step S202). Data examples of the communication method and the encryption method will be described later with reference to FIGS. 4, 5, and 6.

通信装置２に実装されている通信インターフェースの通信方式および暗号化方式を取得した通信装置１は、通信方式および暗号化方式が、通信装置１がサポートする通信方式及び暗号化方式に合致するか否かを判定する（ステップＳ２０３）。通信方式および暗号化方式が合致する場合は、図２に示すようにＮＦＣインターフェース１０４と１１０を使用する通信を終了する（ステップＳ２０４）。そしてＩＥＥＥ８０２．１１ｂインターフェース１０５，１１２を使用して通信を開始し（ステップＳ２０５）、データ通信を行った後（ステップＳ２０６）、通信を終了する（ステップＳ２０７）。ステップＳ２０３までが通信方式及び暗号化方式を判定する方式判定フェーズであり、ステップＳ２０４移行が通信フェーズである。   The communication device 1 that has acquired the communication method and encryption method of the communication interface implemented in the communication device 2 determines whether the communication method and encryption method match the communication method and encryption method supported by the communication device 1. Is determined (step S203). When the communication method and the encryption method match, communication using the NFC interfaces 104 and 110 is terminated as shown in FIG. 2 (step S204). Communication is started using the IEEE802.11b interfaces 105 and 112 (step S205), data communication is performed (step S206), and communication is terminated (step S207). Up to step S203 is the method determination phase for determining the communication method and the encryption method, and the transition to step S204 is the communication phase.

図３においては、ステップＳ２００からＳ２０３までは当然ながら図２と共通している。ただし図３ではステップＳ２０３の判定で、取得した通信方式及び暗号化方式が、通信装置１のサポートする通信方式及び暗号化方式に合致しないと判定されている。そのため、ＮＦＣインターフェース１０４と１１０を使用する通信が継続され、ＮＦＣインターフェース１０４と１１０を使用してデータ通信が行われた後（ステップＳ３０１）、通信が終了される（ステップＳ３０２）。なおステップＳ２０３における判定は、通信方式及び暗号化方式のそれぞれについてなされる。すなわち通信方式と暗号化方式の両方が一致した場合にはじめて図２の手順となる。なお通信装置１、通信装置２の動作アルゴリズムについては、それぞれ図７、図８を参照して後述する。   In FIG. 3, steps S200 to S203 are of course common to FIG. However, in FIG. 3, it is determined in step S <b> 203 that the acquired communication method and encryption method do not match the communication method and encryption method supported by the communication device 1. Therefore, communication using the NFC interfaces 104 and 110 is continued, and after data communication is performed using the NFC interfaces 104 and 110 (step S301), the communication is terminated (step S302). Note that the determination in step S203 is made for each of the communication method and the encryption method. That is, the procedure shown in FIG. 2 is performed only when both the communication method and the encryption method match. The operation algorithms of the communication device 1 and the communication device 2 will be described later with reference to FIGS. 7 and 8, respectively.

＜通信情報および通信情報テーブルの例＞
図４に、通信方式および暗号化方式を示すデータ（通信情報という）４０１のデータ構造の一例を示す。この通信情報が、図２及び図３のステップＳ２０２で通信装置２から通信装置１に対して送信される。さて、通信情報においては、通信方式、通信パラメータ、通信パラメータ長が各１バイトのデータで表され、通信パラメータ長の長さ（たとえばバイト数）分の通信パラメータ値がそのあとに続く。加えて暗号化方式に関する情報として、暗号化方式、暗号鍵種別、暗号鍵長が各１バイトのデータで表され、暗号鍵長の長さ（たとえばバイト数）分の暗号鍵値がそのあとに続く。 <Example of communication information and communication information table>
FIG. 4 shows an example of the data structure of data (referred to as communication information) 401 indicating the communication method and the encryption method. This communication information is transmitted from the communication device 2 to the communication device 1 in step S202 of FIGS. In the communication information, a communication method, a communication parameter, and a communication parameter length are each represented by 1-byte data, and a communication parameter value corresponding to the length of the communication parameter length (for example, the number of bytes) follows. In addition, as encryption method information, the encryption method, encryption key type, and encryption key length are each represented by 1-byte data, and the encryption key value for the length of the encryption key length (for example, the number of bytes) Continue.

通信方式、通信パラメータ、暗号化方式、暗号鍵種別を識別するための値は、一例として図４の表４０２のように定義されている。表４０２によれば、通信方式フィールドに記述された値０ｘ０１はＩＥＥＥ８０２．１１ａを、値０ｘ０２はＩＥＥＥ８０２．１１ｂを、その通信情報の送信元がサポートすることを示す。なお「０ｘ」は１６進数であることを意味する。また通信パラメータフィールドに記述された値０ｘ０９は、その通信パラメータがＩＥＥＥ８０２．１１規格におけるＥＳＳＩＤであることを示す。通信パラメータフィールドに記述された値が０ｘ０９であれば、それに続く通信パラメータ長および通信パラメータ値によりＥＳＳＩＤが示される。また、暗号化方式フィールドに記述された値０ｘ１１はＷＥＰ６４ビットを、値０ｘ１２はＷＥＰ１２８ビットを、値０ｘ１３はＷＰＡを、その通信情報の送信元がサポートすることを示す。暗号化鍵種別フィールドの値０ｘ１９は、そのフィールドに続く鍵情報がＷＥＰキーであることを、値０ｘ１ａは、そのフィールドに続く鍵情報がＰｒｅ−Ｓｈａｒｅｄキーであることを示す。暗号化鍵種別フィールドに続けて、鍵長および鍵の値が示される。   Values for identifying the communication method, communication parameter, encryption method, and encryption key type are defined as shown in Table 402 of FIG. 4 as an example. According to Table 402, the value 0x01 described in the communication method field indicates that IEEE802.11a is supported, and the value 0x02 indicates that the transmission source of the communication information supports IEEE802.11b. “0x” means a hexadecimal number. A value 0x09 described in the communication parameter field indicates that the communication parameter is an ESSID in the IEEE 802.11 standard. If the value described in the communication parameter field is 0x09, the ESSID is indicated by the subsequent communication parameter length and communication parameter value. Also, the value 0x11 described in the encryption method field indicates WEP 64 bits, the value 0x12 indicates WEP 128 bits, the value 0x13 indicates that the transmission source of the communication information supports. The value 0x19 of the encryption key type field indicates that the key information following the field is a WEP key, and the value 0x1a indicates that the key information following the field is a Pre-Shared key. Following the encryption key type field, a key length and a key value are indicated.

図５に、通信装置２から通信装置１へ送信される通信方式および暗号化方式のデータすなわち通信情報の一例を示す。なお、通信装置２のＲＯＭ１０８に保存された通信情報テーブル５０１，５０２には、通信情報そのものが保存されている。したがって、図２，３のステップＳ２０２においては、通信装置２において通信情報テーブル５０１，５０２が読み出されて、その内容が要求に対する応答として通信装置１に対して送信される。同様に、通信装置１のＲＯＭ１０２にも、通信装置１がサポートする通信方式及び暗号化方式を示す通信情報テーブル（本例ではテーブル５０２）が保存されており、受信した通信情報（すなわちテーブル５０１および５０２）と照合される。この例ではテーブル５０２が一致することになる。もちろん通信装置１が複数の通信インターフェースをもつなら、各インターフェースについて通信情報テーブルが保存されている。そこで、各インターフェースに対応する通信情報テーブルそれぞれを、受信した通信情報と照合（あるいは比較）する。一致した通信情報があれば、その通信情報で示される通信方式及び暗号化方式で通信が開始される。なお、複数の通信方式及び暗号化方式が一致した場合には、そのうちのどの方式を用いるかを定めた規則をあらかじめ決めておいても良い。規則の例としては、もっとも通信速度の速い方式を選択したり、あるいは、暗号化強度の最も強い方式を選択するなどの規則がある。各装置がサポートする通信方式及び暗号化方式のうちから、あらかじめ順序を付した表を用意しておくなどすれば、規則にしたがって通信方式及び暗号化方式を選択できる。また、複数の方式が利用可能な場合には、利用者に選択させても良い。この場合には選択肢を示したユーザインターフェースを表示部に表示し、利用者の選択に応じた方式を利用する。   FIG. 5 shows an example of communication method and encryption method data transmitted from the communication device 2 to the communication device 1, that is, communication information. Note that the communication information itself is stored in the communication information tables 501 and 502 stored in the ROM 108 of the communication device 2. Accordingly, in step S202 of FIGS. 2 and 3, the communication information tables 501 and 502 are read by the communication device 2, and the contents are transmitted to the communication device 1 as a response to the request. Similarly, the ROM 102 of the communication device 1 also stores a communication information table (table 502 in this example) indicating the communication method and encryption method supported by the communication device 1, and receives the received communication information (that is, the table 501 and the table 501). 502). In this example, the tables 502 match. Of course, if the communication device 1 has a plurality of communication interfaces, a communication information table is stored for each interface. Therefore, each communication information table corresponding to each interface is collated (or compared) with the received communication information. If there is matching communication information, communication is started by the communication method and encryption method indicated by the communication information. When a plurality of communication methods and encryption methods match, a rule that defines which method to use may be determined in advance. Examples of the rules include a rule such as selecting a method with the highest communication speed or selecting a method with the strongest encryption strength. If a table with an order in advance is prepared from among the communication methods and encryption methods supported by each device, the communication method and encryption method can be selected according to the rules. In addition, when a plurality of methods can be used, the user may select them. In this case, a user interface showing options is displayed on the display unit, and a method according to the user's selection is used.

通信装置２にはＮＦＣインターフェース以外に２つの通信インターフェース１１１，１１２が実装されている。そこで、図５の通信情報５０１，５０２の２つのデータが通信装置１へ送信される。通信情報５０１は、通信方式がＩＥＥＥ８０２．１１ａ、ＥＳＳＩＤが“ｗｌａｎ０”、暗号化方式が１２８ビットＷＥＰ（Ｗｉｒｅｄ Ｅｑｕｉｖａｌｅｎｔ Ｐｒｉｖａｃｙ）、暗号鍵種別がＷＥＰキーで暗号鍵値が“ｓａｍｐｌｅｗｅｐｋｅｙ０”であることを示している。この情報は、図４のテーブル４０２にしたがって図５の通信情報５０１に含まれる各コードを読み解くことで得られる。通信情報５０２は、通信方式がＩＥＥＥ８０２．１１ｂ、ＥＳＳＩＤが“ｗｌａｎ１”、暗号化方式が１２８ビットＷＥＰ、暗号鍵種別がＷＥＰキーで暗号鍵値が“ｓａｍｐｌｅｗｅｐｋｅｙ１”であることを示している。   The communication device 2 is provided with two communication interfaces 111 and 112 in addition to the NFC interface. Therefore, two pieces of data of communication information 501 and 502 in FIG. 5 are transmitted to the communication device 1. The communication information 501 indicates that the communication method is IEEE 802.11a, ESSID is “wlan0”, the encryption method is 128-bit WEP (Wired Equivalent Privacy), the encryption key type is the WEP key, and the encryption key value is “sampleweepkey0”. ing. This information can be obtained by reading each code included in the communication information 501 in FIG. 5 according to the table 402 in FIG. Communication information 502 indicates that the communication method is IEEE802.11b, the ESSID is “wlan1”, the encryption method is 128-bit WEP, the encryption key type is a WEP key, and the encryption key value is “samplewepkey1”.

図４、図５は、通信方式および暗号化方式の情報をバイナリデータで表現したものであるが、別の例としてタグ付きのテキストで表現することもできる。その一例を図６に示す。この場合には、通信装置２は図６のテキストデータ６０１，６０２をテーブル５０１，５０２の代わりに持つ。また、通信装置１はテキストデータ６０２をテーブル５０２の代わりに持つ。したがって通信情報を受信した通信装置１では、タグ付きのテキストを最上位のタグ（図６の例では＜８０２．１１ａ＞および＜８０２．１１ｂ＞）単位で、通信情報を比較する。具体的には、通信装置１が持つテキストデータ６０２と、受信したテキストデータ６０１及び６０２とをそれぞれ比較する。   4 and 5 show the information of the communication method and the encryption method as binary data, but as another example, they can also be expressed as a tagged text. An example is shown in FIG. In this case, the communication apparatus 2 has the text data 601 and 602 in FIG. 6 instead of the tables 501 and 502. Further, the communication device 1 has text data 602 instead of the table 502. Therefore, in the communication device 1 that has received the communication information, the communication information is compared in units of text with a tag in the highest tag (<802.11a> and <802.11b> in the example of FIG. 6). Specifically, the text data 602 possessed by the communication device 1 is compared with the received text data 601 and 602, respectively.

一致したテキストデータがあれば（たとえばテキストデータ６０２）、そのテキストデータを解析して通信方式および暗号化方式の情報を得る。そして得られた情報に従って通信を実行する。   If there is matching text data (for example, text data 602), the text data is analyzed to obtain information on the communication method and the encryption method. Then, communication is performed according to the obtained information.

＜通信装置１による制御手順＞
図７に、通信装置１の動作アルゴリズムを示す。ステップＳ７０１では、通信装置１が通信装置２へ近づけられることにより、ＮＦＣインターフェース１０４を使用する通信が開始される。 <Control procedure by communication device 1>
FIG. 7 shows an operation algorithm of the communication device 1. In step S <b> 701, communication using the NFC interface 104 is started by bringing the communication device 1 closer to the communication device 2.

ステップＳ７０２では、ＮＦＣインターフェース１０４を使用する通信により通信方式および暗号化方式を要求するメッセージを通信装置２へ送信する。   In step S <b> 702, a message requesting a communication method and an encryption method is transmitted to the communication device 2 by communication using the NFC interface 104.

ステップＳ７０３では、図４、図５、図６の例で示されるような通信方式および暗号化方式に関するデータ（通信情報）を通信装置２から受信する。   In step S703, data (communication information) related to the communication method and the encryption method as shown in the examples of FIGS. 4, 5, and 6 is received from the communication device 2.

ステップＳ７０４では、ステップＳ７０３で通信装置２から受信した通信情報で示される通信方式および暗号化方式が、通信装置１に実装されている通信方式および暗号化方式に合致するか否かが判別される。この判定は、上述のように、受信した通信情報と通信装置１が持つ通信情報テーブルとを照合することで行える。通信方式および暗号化方式が合致する場合はステップＳ７０５へ進み、通信方式および暗号化方式が合致しない場合はステップＳ７０９へ進み、処理が続けられる。   In step S704, it is determined whether or not the communication method and encryption method indicated by the communication information received from the communication device 2 in step S703 matches the communication method and encryption method installed in the communication device 1. . This determination can be performed by collating the received communication information with the communication information table held by the communication device 1 as described above. If the communication method and the encryption method match, the process proceeds to step S705. If the communication method and the encryption method do not match, the process proceeds to step S709 and the processing is continued.

通信装置２から受信した通信情報がたとえば図５あるいは図６に示されるような通信情報５０１および通信情報５０２（あるいは６０１と６０２）であるとする。本実施形態においては、通信装置１はＩＥＥＥ８０２．１１ｂインターフェースを実装しているので、通信装置１が持つ通信情報テーブルは通信情報５０２（あるいは６０２）である。したがって、通信情報テーブル５０２は受信した通信情報と合致する。そこで、一致した通信情報で示される通信方式と暗号化方式を用いて、通信装置１と通信装置２とは通信可能である。すなわちこの例では、通信装置１と通信装置２とは、ＩＥＥＥ８０２．１１ｂインターフェースという共通の通信方式をサポートすることがわかる。さらに通信装置１と通信装置２とは、１２８ビットＷＥＰという共通の暗号化方式をサポートすることもわかる。一方、たとえば通信装置１の暗号化方式がＷＰＡ（Ｗｉ−Ｆｉ Ｐｒｏｔｅｃｔｅｄ Ａｃｃｅｓｓ）あるいは６４ビットＷＥＰの場合は、暗号化方式が合致しないので通信方式および暗号化方式が合致しないと判定される。なおここでいう暗号化方式には暗号鍵の内容も含む。すなわち方式が同じであっても鍵が一致しなければ、方式が一致するとは判定されない。   Assume that the communication information received from the communication device 2 is, for example, communication information 501 and communication information 502 (or 601 and 602) as shown in FIG. 5 or FIG. In this embodiment, since the communication device 1 is equipped with the IEEE802.11b interface, the communication information table possessed by the communication device 1 is the communication information 502 (or 602). Therefore, the communication information table 502 matches the received communication information. Therefore, the communication device 1 and the communication device 2 can communicate using the communication method and the encryption method indicated by the matched communication information. That is, in this example, it can be seen that the communication device 1 and the communication device 2 support a common communication method called an IEEE802.11b interface. Further, it can be seen that the communication device 1 and the communication device 2 support a common encryption method of 128-bit WEP. On the other hand, for example, when the encryption method of the communication apparatus 1 is WPA (Wi-Fi Protected Access) or 64-bit WEP, it is determined that the communication method and the encryption method do not match because the encryption method does not match. The encryption method here includes the contents of the encryption key. That is, even if the methods are the same, if the keys do not match, it is not determined that the methods match.

ステップＳ７０５では、ＮＦＣインターフェース１０４を使用する通信を終了する。ステップＳ７０６では、ステップＳ７０４における判定により、通信装置１と通信装置２とで合致したと判定された共通の通信方式および暗号化方式にしたがって通信を開始する。本実施形態では、ＩＥＥＥ８０２．１１ｂ、１２８ビットＷＥＰで通信を開始する。ステップＳ７０７では、ステップＳ７０６で開始された通信方式でデータ通信を行う。ステップＳ７０８では、ステップＳ７０６で開始された通信方式による通信を終了する。   In step S705, the communication using the NFC interface 104 is terminated. In step S706, communication is started in accordance with the common communication method and encryption method determined by the determination in step S704 that the communication device 1 and the communication device 2 match. In this embodiment, communication is started with IEEE 802.11b, 128-bit WEP. In step S707, data communication is performed using the communication method started in step S706. In step S708, communication using the communication method started in step S706 is terminated.

ステップＳ７０９では、ＮＦＣインターフェース１０４を使用する通信を継続し、データ通信を行う。ステップＳ７１０では、ＮＦＣインターフェース１０４を使用する通信を終了する。   In step S709, communication using the NFC interface 104 is continued and data communication is performed. In step S710, communication using the NFC interface 104 is terminated.

＜通信装置２による制御手順＞
図８に、通信装置２の動作アルゴリズムを示す。ステップＳ８０１では、通信装置１が通信装置２へ近づけられることにより、ＮＦＣインターフェース１１０を使用する通信が開始される。 <Control procedure by communication device 2>
FIG. 8 shows an operation algorithm of the communication device 2. In step S <b> 801, communication using the NFC interface 110 is started by bringing the communication device 1 closer to the communication device 2.

ステップＳ８０２では、通信装置１から通信方式および暗号化方式を要求するメッセージを受信したか否かを判定する。メッセージを受信したときはステップＳ８０３へ進み、メッセージを受信しないときは再度ステップＳ８０２へ進んでメッセージの受信を待つ。   In step S802, it is determined whether a message requesting a communication method and an encryption method has been received from the communication device 1. If a message is received, the process proceeds to step S803. If no message is received, the process proceeds to step S802 again to wait for the message to be received.

ステップＳ８０３では、通信方式および暗号化方式の要求に応答して、図４、図５、図６の例に示されるようなデータすなわち通信情報を通信装置２から通信装置１へ送信する。   In step S803, in response to the request for the communication method and the encryption method, data as shown in the examples of FIGS. 4, 5, and 6, that is, communication information is transmitted from the communication device 2 to the communication device 1.

ステップＳ８０４では、ＮＦＣインターフェース１１０を使用する通信が終了されて通信装置２に実装されているＮＦＣ以外の通信方式で通信が開始されたか否かが判別される。ＮＦＣ以外の通信方式で通信が開始される場合はステップＳ８０５へ進み、ＮＦＣで通信が継続されるばあいはステップＳ８０７へ進み、処理が続けられる。なお、ステップＳ８０４は、実際の処理上は行われなくとも良い。すなわち、ステップＳ８０３でいったん処理を終了し、その後通信装置２は、通信装置１により開始された通信の方式にしたがってステップＳ８０５またはステップＳ８０７のいずれかからデータ通信を実行してもよい。   In step S804, it is determined whether communication using the NFC interface 110 is terminated and communication is started using a communication method other than NFC installed in the communication device 2. If communication is started by a communication method other than NFC, the process proceeds to step S805. If communication is continued by NFC, the process proceeds to step S807, and the process is continued. Note that step S804 may not be performed in actual processing. In other words, the processing may be terminated once in step S803, and then the communication device 2 may execute data communication from either step S805 or step S807 according to the communication method started by the communication device 1.

ステップＳ８０５では、通信装置１により開始された通信方式で通信を行う。ステップＳ８０６では、ステップＳ８０４で開始された通信方式による通信を終了する。   In step S805, communication is performed using the communication method started by the communication device 1. In step S806, communication using the communication method started in step S804 is terminated.

一方ステップＳ８０７では、ＮＦＣインターフェース１１０を使用する通信が継続されてデータ通信を行う。ステップＳ８０８では、ＮＦＣインターフェース１１０を使用する通信を終了する。   On the other hand, in step S807, communication using the NFC interface 110 is continued to perform data communication. In step S808, communication using the NFC interface 110 is terminated.

以上の構成及び手順により、本実施形態の通信装置は、通信の機密性を確保しつつ通信方式及び暗号化方式に関する情報を取得可能である。また、取得した通信方式にしたがって通信を行う場合でも、通信の機密性を確保できる。また、取得した通信方式で通信を行えない場合でも、確実に通信を行えしかも通信の機密性を確保できるという効果を奏する。   With the configuration and procedure described above, the communication apparatus according to the present embodiment can acquire information on the communication method and the encryption method while ensuring the confidentiality of communication. Even when communication is performed according to the acquired communication method, confidentiality of communication can be ensured. In addition, even when communication cannot be performed using the acquired communication method, there is an effect that communication can be performed reliably and communication confidentiality can be ensured.

［第２の実施形態］
図９は、本発明の第２の実施形態に係る通信システムの構成および動作概略を示す図である。本発明の第２の実施形態においては、本発明の第１の実施形態における通信装置１に相当するものとしてデジタルカメラ（ＤＳＣ）９０１、通信装置２に相当するものとしてプリンタ９０２が使用されている。 [Second Embodiment]
FIG. 9 is a diagram showing a configuration and an operation outline of a communication system according to the second embodiment of the present invention. In the second embodiment of the present invention, a digital camera (DSC) 901 is used as the communication device 1 in the first embodiment of the present invention, and a printer 902 is used as the communication device 2. .

ＤＳＣ９０１をプリンタ９０２に近づけることによりＮＦＣで通信が開始され、プリンタ９０２に実装されている通信方式および暗号化方式を要求するメッセージがＤＳＣ９０１からプリンタ９０２へ送信される（Ｓ９１１）。   Communication is started by NFC by bringing the DSC 901 closer to the printer 902, and a message requesting the communication method and encryption method installed in the printer 902 is transmitted from the DSC 901 to the printer 902 (S911).

プリンタ９０２に実装されている通信方式がＩＥＥＥ８０２．１１ｂであり、その暗号化方式が１２８ビットＷＥＰである場合、その情報がプリンタ９０２からＤＳＣ９０１へ送信される（Ｓ９１２）。   If the communication method implemented in the printer 902 is IEEE 802.11b and the encryption method is 128-bit WEP, the information is transmitted from the printer 902 to the DSC 901 (S912).

プリンタ９０２に実装されている通信方式および暗号化方式がＤＳＣ９０１に実装されているか否かが判別される。   It is determined whether or not the communication method and encryption method installed in the printer 902 are installed in the DSC 901.

ＤＳＣ９０１の通信方式としてＩＥＥＥ８０２．１１ｂが実装されていてその暗号化方式が１２８ビットＷＥＰである場合、通信方式および暗号化方式が合致する。そこで、通信方式をＩＥＥＥ８０２．１１ｂとし、暗号化方式を１２８ビットＷＥＰとする通信が、ＤＳＣ９０１とプリンタ９０２との間で開始され、ＤＳＣ９０１から画像データがプリンタ９０２へ送信される。   When IEEE802.11b is implemented as the DSC 901 communication method and the encryption method is 128-bit WEP, the communication method and the encryption method match. Therefore, communication with IEEE 802.11b as the communication method and 128-bit WEP as the encryption method is started between the DSC 901 and the printer 902, and image data is transmitted from the DSC 901 to the printer 902.

たとえばＤＳＣ９０１の通信方式としてＩＥＥＥ８０２．１１ｂが実装されていてその暗号化方式がＷＰＡの場合、通信方式および暗号化方式の一方が合致しないので、ＮＦＣによる通信が継続されてＤＳＣ９０１から画像データがプリンタ９０２へ送信される。   For example, when IEEE802.11b is installed as a communication method of DSC 901 and the encryption method is WPA, since one of the communication method and the encryption method does not match, communication by NFC is continued and image data is transferred from the DSC 901 to the printer 902. Sent to.

図１０に、ＤＳＣ９０１の動作アルゴリズムを示す。ステップＳ１００１、Ｓ１００２、Ｓ１００３、Ｓ１００４、Ｓ１００５、Ｓ１００６、Ｓ１００７、Ｓ１００８、Ｓ１０１０、Ｓ１０１１は、本発明の第１の実施形態における通信装置１の動作アルゴリズム（図７）に示されるステップＳ７０１、Ｓ７０２、Ｓ７０３、Ｓ７０４、Ｓ７０５、Ｓ７０６、Ｓ７０７、Ｓ７０８、Ｓ７０９、Ｓ７１０とそれぞれ同一の処理である。   FIG. 10 shows an operation algorithm of the DSC 901. Steps S1001, S1002, S1003, S1004, S1005, S1006, S1007, S1008, S1010, and S1011 are steps S701, S702, and S703 shown in the operation algorithm (FIG. 7) of the communication apparatus 1 according to the first embodiment of the present invention. , S704, S705, S706, S707, S708, S709, and S710, respectively.

ただし、図１０のステップＳ１００９において、ＮＦＣで通信が継続されることをＤＳＣ９０１の使用者へ通知する。たとえば、ＮＦＣで通信できるようにＤＳＣ９０１をプリンタ９０２へ近づけた状態を維持するような指示を、ＤＳＣ９０１の表示部に表示する。一例として、「プリンタと接触させてください」というようなメッセージがＤＳＣ９０１の表示部に表示される。   However, in step S1009 in FIG. 10, the user of the DSC 901 is notified that communication is continued with NFC. For example, an instruction to keep the DSC 901 close to the printer 902 so that NFC communication can be performed is displayed on the display unit of the DSC 901. As an example, a message such as “Please contact the printer” is displayed on the display unit of the DSC 901.

以上のように本実施形態によれば、第１実施形態の効果に加えて、第１実施形態の通信システムをディジタルカメラ及びプリンタに適用したことで、ディジタルカメラとプリンタとの間で、情報を秘匿した通信を実現することができる。また、ＮＦＣにより通信を行う場合には、その旨を示すメッセージをディジタルカメラに表示することで、利用者に確実な通信環境の構築を促すことができる。   As described above, according to the present embodiment, in addition to the effects of the first embodiment, by applying the communication system of the first embodiment to the digital camera and the printer, information is transmitted between the digital camera and the printer. Secret communication can be realized. Further, when communication is performed by NFC, a message indicating that is displayed on the digital camera, thereby prompting the user to establish a reliable communication environment.

［第３の実施形態］
本発明の第１の実施形態および第２の実施形態では、近距離無線通信方式としてＮＦＣを使用している。これに対して、それ以外の近距離無線通信方式として、赤外線通信、Ｂｌｕｅｔｏｏｔｈ（登録商標）、ＵＷＢ（Ｕｌｔｒａ Ｗｉｄｅ Ｂａｎｄ）を使用することもできる。 [Third Embodiment]
In the first embodiment and the second embodiment of the present invention, NFC is used as the short-range wireless communication system. On the other hand, infrared communication, Bluetooth (registered trademark), or UWB (Ultra Wide Band) can be used as other short-range wireless communication methods.

また、本発明の第１の実施形態および第２の実施形態では、通信を暗号化してセキュリティを確保する無線通信方式としてＩＥＥＥ８０２．１１ａ、ＩＥＥＥ８０２．１１ｂを使用している。これに限らず、数十メートルの通信距離があり、通信を暗号化してセキュリティを確保することができる通信方式ならば、その他の通信方式や今後規格化される通信方式も使用することができる。   In the first embodiment and the second embodiment of the present invention, IEEE802.11a and IEEE802.11b are used as wireless communication schemes that secure security by encrypting communication. The present invention is not limited to this, and any other communication method or a communication method that will be standardized in the future can be used as long as the communication method has a communication distance of several tens of meters and can secure communication by encrypting communication.

また、本発明の第１の実施形態および第２の実施形態では、通信を暗号化する暗号化方式としてＷＥＰ（Ｗｉｒｅｄ Ｅｑｕｉｖａｌｅｎｔ Ｐｒｉｖａｃｙ）、ＷＰＡ（Ｗｉ−Ｆｉ Ｐｒｏｔｅｃｔｅｄ Ａｃｃｅｓｓ）を使用している。しかし、その他の暗号化方式や、今後規格化される暗号化方式も使用可能である。   In the first and second embodiments of the present invention, WEP (Wired Equivalent Privacy) and WPA (Wi-Fi Protected Access) are used as encryption methods for encrypting communication. However, other encryption methods and encryption methods that will be standardized in the future can also be used.

なお本発明は、複数の機器（例えばホストコンピュータ、インタフェイス機器、リーダ、プリンタなど）から構成されるシステムに適用しても、一つの機器からなる装置（例えば、複写機、ファクシミリ装置など）に適用してもよい。また本発明の目的は、前述の実施形態の機能を実現するプログラムコードを記録した記録媒体を、システムあるいは装置に供給し、そのシステムあるいは装置のコンピュータが記憶媒体に格納されたプログラムコードを読み出し実行することによっても達成される。この場合、記憶媒体から読み出されたプログラムコード自体が前述した実施形態の機能を実現することになり、そのプログラムコード自体およびプログラムコードを記憶した記憶媒体は本発明を構成することになる。   Note that the present invention can be applied to a system (for example, a copier, a facsimile machine, etc.) consisting of a single device even if it is applied to a system composed of a plurality of devices (eg, a host computer, interface device, reader, printer, etc.). You may apply. Another object of the present invention is to supply a recording medium recording a program code for realizing the functions of the above-described embodiments to a system or apparatus, and the system or apparatus computer reads out and executes the program code stored in the storage medium. Is also achieved. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention.

また、本発明には、プログラムコードの指示に基づき、コンピュータ上で稼働しているオペレーティングシステム(OS)などが実際の処理の一部または全部を行い、その処理によって前述した実施形態の機能が実現される場合も含まれる。さらに、記憶媒体から読み出されたプログラムコードが、コンピュータに挿入された機能拡張カードやコンピュータに接続された機能拡張ユニットに備わるメモリに書込まれた場合についても、本発明は適用される。その場合、書き込まれたプログラムコードの指示に基づき、その機能拡張カードや機能拡張ユニットに備わるCPUなどが実際の処理の一部または全部を行い、その処理によって前述した実施形態の機能が実現される。   Further, according to the present invention, the operating system (OS) running on the computer performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. This is also included. Furthermore, the present invention is also applied to the case where the program code read from the storage medium is written into a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer. In that case, based on the instruction of the written program code, the CPU of the function expansion card or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing. .

本発明の実施形態に係る通信装置１および通信装置２の構成を示す図。The figure which shows the structure of the communication apparatus 1 and the communication apparatus 2 which concern on embodiment of this invention. 本発明の実施形態に係る通信装置１および通信装置２の動作シーケンスおよび動作概念を示す図。The figure which shows the operation | movement sequence and operation | movement concept of the communication apparatus 1 and the communication apparatus 2 which concern on embodiment of this invention. 本発明の実施形態に係る通信装置１および通信装置２の動作シーケンスおよび動作概念を示す図。The figure which shows the operation | movement sequence and operation | movement concept of the communication apparatus 1 and the communication apparatus 2 which concern on embodiment of this invention. 本発明の実施形態に係る通信方式および暗号化方式のデータ構造の一例を示す図。The figure which shows an example of the data structure of the communication system and encryption system which concern on embodiment of this invention. 本発明の実施形態に係る通信方式および暗号化方式のデータの一例を示す図。The figure which shows an example of the data of the communication system and encryption system which concern on embodiment of this invention. 本発明の実施形態に係る通信方式および暗号化方式のデータの一例を示す図。The figure which shows an example of the data of the communication system and encryption system which concern on embodiment of this invention. 本発明の実施形態に係る通信装置１の動作アルゴリズムを示す図。The figure which shows the operation | movement algorithm of the communication apparatus 1 which concerns on embodiment of this invention. 本発明の実施形態に係る通信装置２の動作アルゴリズムを示す図。The figure which shows the operation | movement algorithm of the communication apparatus 2 which concerns on embodiment of this invention. 本発明の第２の実施形態に係るデジタルカメラとプリンタで行われる通信の動作概念を示す図。The figure which shows the operation | movement concept of the communication performed with the digital camera and printer which concern on the 2nd Embodiment of this invention. 本発明の第２の実施形態に係るデジタルカメラの動作アルゴリズムを示す図。The figure which shows the operation | movement algorithm of the digital camera which concerns on the 2nd Embodiment of this invention.

符号の説明Explanation of symbols

１０１ ＣＰＵ
１０２ ＲＯＭ
１０３ ＲＡＭ
１０４ ＮＦＣインターフェース
１０５ ＩＥＥＥ８０２．１１ｂインターフェース
１０６ バス
１０７ ＣＰＵ
１０８ ＲＯＭ
１０９ ＲＡＭ
１１０ ＮＦＣインターフェース
１１１ ＩＥＥＥ８０２．１１ａインターフェース
１１２ ＩＥＥＥ８０２．１１ｂインターフェース
１１３ バス
９０１ デジタルカメラ（ＤＳＣ）
９０２ プリンタ 101 CPU
102 ROM
103 RAM
104 NFC interface 105 IEEE802.11b interface 106 Bus 107 CPU
108 ROM
109 RAM
110 NFC interface 111 IEEE 802.11a interface 112 IEEE 802.11b interface 113 Bus 901 Digital camera (DSC)
902 Printer

Claims (11)

複数の通信方式を持つ他の通信装置と通信可能な通信装置であって、
第１の通信方式に従って無線通信する第１の通信手段と、
第２の通信方式および暗号化方式に従って無線通信する第２の通信手段と、
前記第１の通信手段を用いた通信により、前記他の通信装置の通信方式および暗号化方式を取得する方式取得手段と、
前記方式取得手段により取得された前記他の通信装置の通信方式および暗号化方式が、前記第２の通信手段の通信方式および暗号化方式に合致するか否かを判定する判定手段と、
前記判定手段により合致すると判定された場合は、前記第２の通信手段により前記第２の通信方式及び前記暗号化方式に従って前記他の通信装置と通信を行い、合致しないと判定された場合には、前記第１の通信手段により前記第１の通信方式に従って前記他の通信装置と通信を行う通信制御手段と
を備えることを特徴とする通信装置。 A communication device capable of communicating with other communication devices having a plurality of communication methods,
First communication means for wireless communication according to a first communication method;
A second communication means for performing wireless communication according to the second communication method and the encryption method;
A method acquisition unit that acquires a communication method and an encryption method of the other communication device by communication using the first communication unit;
A determination unit that determines whether a communication method and an encryption method of the other communication device acquired by the method acquisition unit match a communication method and an encryption method of the second communication unit;
If it is determined by the determination means that the data matches, the second communication means communicates with the other communication device according to the second communication method and the encryption method, and if it is determined that they do not match A communication apparatus comprising: a communication control means for communicating with the other communication apparatus according to the first communication method by the first communication means. 複数の通信方式を持つ他の通信装置と通信可能な通信装置であって、
第１の通信方式に従って無線通信する第１の通信手段と、
第２の通信方式および暗号化方式に従って無線通信する第２の通信手段と、
前記第１の通信手段を用いた通信により、前記他の通信装置から受信した通信方式および暗号化方式の要求に対して、前記第２の通信方式及び暗号化方式を応答する応答手段と、
前記応答手段による応答後、前記他の通信装置により前記第１の通信方式で通信が開始されれば前記第１の通信手段により通信を行い、前記他の通信装置により前記第２の通信方式で通信が開始されれば前記第２の通信手段により通信を行通信制御手段と
を備えることを特徴とする通信装置。 A communication device capable of communicating with other communication devices having a plurality of communication methods,
First communication means for wireless communication according to a first communication method;
A second communication means for performing wireless communication according to the second communication method and the encryption method;
Response means for responding to the request for the communication method and the encryption method received from the other communication device by communication using the first communication means, and responding to the second communication method and the encryption method;
After communication by the response means, if communication is started by the other communication device in the first communication method, communication is performed by the first communication device, and by the second communication device by the second communication method. A communication apparatus comprising: a communication control unit for performing communication by the second communication unit when communication is started. 前記第１の通信方式は、近距離無線通信方式であることを特徴とする請求項１又は２に記載の通信装置。   The communication apparatus according to claim 1, wherein the first communication method is a short-range wireless communication method. 前記第１の通信方式は、ＩＳＯ／ＩＥＣ ＩＳ １８０９２規格にしたがう非接触ＩＣカード通信方式であることを特徴とする請求項１又は２に記載の通信装置。   The communication apparatus according to claim 1 or 2, wherein the first communication method is a contactless IC card communication method according to the ISO / IEC IS 18092 standard. 前記第１の通信方式により通信を行う場合に、利用者に対して前記通信装置を前記他の通信装置に近付ける旨のメッセージを出力する出力手段を更に備えることを特徴とする請求項３又は４に記載の通信装置。   5. The apparatus according to claim 3, further comprising output means for outputting a message to the user that the communication device is brought close to the other communication device when communication is performed by the first communication method. The communication apparatus as described in. 請求項１乃至５のいずれか１項に記載の通信装置を備え、前記他の通信装置としてプリンタ装置に対して画像データを送信することを特徴とするディジタルカメラ装置。   6. A digital camera device comprising the communication device according to claim 1 and transmitting image data to a printer device as the other communication device. 請求項１乃至５のいずれか１項に記載の通信装置を備え、前記他の通信装置としてディジタルカメラ装置から画像データを受信することを特徴とするプリンタ装置。   A printer device comprising the communication device according to claim 1, wherein the image device receives image data from a digital camera device as the other communication device. 請求項１に記載の通信装置と、請求項２に記載の通信装置とを備えることを特徴とする通信システム。   A communication system comprising the communication device according to claim 1 and the communication device according to claim 2. 互いに通信方式の異なる第１及び第２の通信手段を持つ通信装置の制御方法であって、
前記第１の通信手段を用いた通信により、他の通信装置の通信方式および暗号化方式を取得する方式取得工程と、
前記方式取得工程により取得された前記他の通信装置の通信方式および暗号化方式が、前記第２の通信手段の通信方式および暗号化方式に合致するか否かを判定する判定工程とを備え、
前記判定工程により合致すると判定された場合は、前記第２の通信手段の通信方式及び暗号化方式に従って前記他の通信装置と通信を行い、合致しないと判定された場合には、前記第１の通信手段の通信方式に従って前記他の通信装置と通信を行うことを特徴とする通信装置の制御方法。 A method for controlling a communication apparatus having first and second communication means having different communication methods,
A method acquisition step of acquiring a communication method and an encryption method of another communication device by communication using the first communication means;
A determination step of determining whether the communication method and the encryption method of the other communication device acquired by the method acquisition step match the communication method and the encryption method of the second communication unit,
If it is determined by the determination step that the two communication means match, the communication with the other communication device is performed according to the communication method and the encryption method of the second communication means. A communication device control method, wherein communication is performed with the other communication device according to a communication method of a communication means. 互いに通信方式の異なる第１及び第２の通信手段を持つ通信装置の制御方法であって、
前記第１の通信手段を用いた通信により、通信方式および暗号化方式の要求を受信する受信工程と、
前記受信工程により受信した要求に対して、前記第２の通信手段の通信方式及び暗号化方式を応答する応答工程と、
前記応答工程による応答後、前記他の通信装置により前記第１の通信手段の通信方式で通信が開始されれば前記第１の通信手段により通信を行い、前記他の通信装置により前記第２の通信手段の通信方式で通信が開始されれば前記第２の通信手段により通信を行うことを特徴とする通信装置の制御方法。 A method for controlling a communication apparatus having first and second communication means having different communication methods,
A receiving step of receiving a request for a communication method and an encryption method by communication using the first communication means;
A response step of responding to the request received in the receiving step with the communication method and the encryption method of the second communication means;
After communication by the response step, if communication is started by the communication method of the first communication means by the other communication device, communication is performed by the first communication device, and the second communication device performs the second communication. A communication apparatus control method, wherein communication is performed by the second communication means when communication is started by a communication method of a communication means. 請求項９または請求項１０に記載された通信装置の制御方法の各工程をコンピュータにより実行させることを特徴とするプログラム。   A program that causes a computer to execute each step of the communication device control method according to claim 9.
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