JP2002300156A - Electronic information processing method, its program, and recording medium for recording the program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic information processing method that is useful for preventing a copyright from being violated. SOLUTION: A network center 1 encrypts electronic information acquired from an electronic information server 3 by using a common key Ka used for authenticating a mobile phone terminal 2A of a destination. The mobile phone terminal 2A encrypts the electronic information by using the common key Ka used for authentication by the network center 1 and writes the encrypted information to a recording medium or transmits it to other terminals. The mobile phone terminal 2A reads the electronic information encrypted by the common key Ka from the recording medium or decodes the information received from other terminals by the common key Ka.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic information processing method useful for preventing copyright infringement, a program thereof, and a recording medium on which the program is recorded.

[0002]

2. Description of the Related Art Conventionally, mobile communication networks (mobile telephone networks, P
In an HS network, a car telephone network, etc., subscriber authentication using a key is performed.

FIG. 6 is a sequence diagram showing subscriber authentication in a mobile communication network.

[0004] In a conventional mobile communication network, a common encryption system is implemented in a mobile portable terminal (referred to as a portable telephone, a PHS terminal, a car telephone, etc.) of each subscriber and a network center 100. Each mobile portable terminal stores a common key unique to the terminal, and the network center 100 stores the common key.

[0005] For example, mobile terminal 200A of subscriber A
Requests the network center 100 to communicate with the mobile terminal 200B of the subscriber B, the network center 100 transmits a random number R to the mobile terminal 200A. The mobile portable terminal 200A encrypts this random number R with its own common key Ka and transmits it to the network center 100.
The network center 100 reads out the stored common key Ka of the mobile mobile terminal 200A, and
The random number R sent to 00A is encrypted. Then, it is determined whether or not the cipher text matches the cipher text from mobile portable terminal 200A. If they match, mobile mobile terminal 200A
Is determined to be a legitimate terminal, a communication connection is established with the mobile portable terminal 200B, and the mobile portable terminal 200A is charged.

[0006]

In recent years, however, a mobile communication network whose main purpose is telephone communication and an electronic information communication network such as the Internet whose main purpose is transmission / reception of electronic information are interconnected. Electronic information such as books and music that require copyright protection can be downloaded from a mobile portable terminal via a mobile communication network.

[0007] Due to its nature, electronic information can be reused by storing it. For example, if the music data is downloaded and recorded on a recording medium (recording medium) or a personal computer, the mobile portable terminal can read and play the music data from the recording medium or the personal computer at any time. On the other hand, when electronic information that requires protection by copyright is stored in a recording medium, a personal computer, or the like, there is a possibility of copyright infringement due to theft, so that the electronic information needs to be encrypted.

[0008] In the business related to the mobile communication network, each company is competing for subscriber acquisition. For this reason, there is a strong demand for providing a mobile communication network with a function of concealing electronic information (a function of preventing copyright infringement) to differentiate itself from other companies.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide electronic information useful for preventing copyright infringement performed by a mobile portable terminal or a mobile communication network. An object of the present invention is to provide a processing method, a program thereof, and a recording medium on which the program is recorded.

[0010]

In order to solve the above-mentioned conventional problems, an electronic information processing method according to a first aspect of the present invention provides a mobile portable terminal having a key used for authentication in a mobile communication network. In which the electronic information is encrypted with the key and written to a recording medium, or transmitted to another terminal.

An electronic information processing method according to a second aspect of the present invention is an electronic information processing method performed by a mobile portable terminal having a key used for authentication in a mobile communication network. The electronic information is read from a recording medium or received from another terminal and decrypted with the key.

An electronic information processing method according to a third aspect of the present invention is an electronic information processing method performed by a mobile communication network for transmitting electronic information to a mobile terminal that has requested acquisition, wherein the electronic information is It is characterized in that it is encrypted with a key used for authentication of a mobile mobile terminal of a destination.

[0013] An electronic information processing method according to claim 4 of the present invention is an electronic information processing method performed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition. It is characterized in that encryption is performed using a public key that is paired with a secret key used in a mobile portable terminal of a transmission destination.

An electronic information processing method according to a fifth aspect of the present invention is the electronic information processing method according to the fourth aspect, wherein the public key is obtained in advance from a destination mobile portable terminal.

An electronic information processing method according to a sixth aspect of the present invention is an electronic information processing method performed by a mobile portable terminal authenticated in a mobile communication network when acquiring electronic information, wherein a private key and a private key are paired. The public key to be formed is encrypted with a common key used for authentication in the mobile communication network, transmitted, and the electronic information encrypted with the public key decrypted in the mobile communication network is received. It is characterized by decrypting with a key.

The electronic information processing program according to claim 7 of the present invention is an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network,
The electronic information is encrypted with the key and written on a recording medium, or transmitted to another terminal.

An electronic information processing program according to claim 8 of the present invention is an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network,
The electronic information encrypted with the key is read from a recording medium or received from another terminal and decrypted with the key.

An electronic information processing program according to a ninth aspect of the present invention is an electronic information processing program executed by a mobile communication network that transmits electronic information to a mobile portable terminal that has requested acquisition. It is characterized in that it is encrypted with a key used for authentication of a mobile portable terminal of a transmission destination.

An electronic information processing program according to a tenth aspect of the present invention is an electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition. It is characterized in that encryption is performed using a public key that is paired with a secret key used in a mobile portable terminal of a transmission destination.

An electronic information processing program according to an eleventh aspect of the present invention is the electronic information processing program according to the tenth aspect, wherein the public key is obtained in advance from a mobile portable terminal of a transmission destination.

An electronic information processing program according to a twelfth aspect of the present invention is an electronic information processing program executed by a mobile portable terminal authenticated in a mobile communication network when acquiring electronic information. The public key to be formed is encrypted with a common key used for authentication in the mobile communication network, transmitted, and the electronic information encrypted by the public key decrypted in the mobile communication network is received. It is characterized by decrypting with a key.

A recording medium according to a thirteenth aspect of the present invention is a recording medium in which an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network is recorded. And an electronic information processing program for encrypting and writing electronic information to a recording medium, or transmitting the electronic information to another terminal.

A recording medium according to a fourteenth aspect of the present invention is a recording medium in which an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network is recorded. An electronic information processing program for reading the electronic information encrypted by the computer from the recording medium or receiving the electronic information from another terminal and decrypting with the key is recorded.

A recording medium according to a fifteenth aspect of the present invention is a recording medium storing an electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition. An electronic information processing program for encrypting electronic information with a key used for authentication of a destination mobile portable terminal is recorded.

[0025] A recording medium according to a sixteenth aspect of the present invention is a recording medium in which an electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition is recorded. An electronic information processing program for encrypting electronic information with a public key paired with a secret key used in a destination mobile portable terminal is recorded.

[0026] According to a seventeenth aspect of the present invention, in the electronic information processing program according to the sixteenth aspect, the electronic information processing program for previously acquiring the public key from a destination mobile portable terminal is recorded. It is characterized by.

[0027] A recording medium according to claim 18 of the present invention is a recording medium in which an electronic information processing program executed by a mobile portable terminal authenticated in a mobile communication network to acquire electronic information is recorded. A public key forming a pair with a key is transmitted after being encrypted with a common key used for authentication in the mobile communication network, and electronic information encrypted with the public key decrypted in the mobile communication network is received. An electronic information processing program for decrypting with the secret key is recorded.

According to the present invention, as a first feature, a mobile portable terminal encrypts electronic information with a key used for authentication in a mobile communication network and writes it on a recording medium, or transmits it to another terminal. Therefore, it is possible to prevent copyright infringement on a recording medium or another terminal.

According to the present invention, as a second feature, the mobile portable terminal reads electronic information encrypted with a key used for authentication in a mobile communication network from a recording medium, or other terminal. And decrypts the received information with the key, the digital information whose copyright has been prevented from being infringed on the recording medium or another terminal can be used by the mobile portable terminal.

According to the present invention, as a third feature, a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition is used to authenticate the electronic information to a mobile portable terminal of a transmission destination. Since encryption is performed using the key to be used, copyright infringement during transmission can be prevented.

According to the present invention, as a fourth feature, a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition is used for transmitting electronic information to a mobile portable terminal of a transmission destination. Since encryption is performed using a public key paired with a secret key, copyright infringement during transmission can be prevented.

According to the present invention, as a fifth feature, the mobile communication network obtains a public key from a destination mobile portable terminal in advance, so that infringement of copyright during transmission is prevented. It is not necessary to store the public key in the mobile communication network in advance.

In the present invention, as a sixth characteristic, the mobile portable terminal encrypts a public key paired with a secret key with a common key used for authentication in a mobile communication network and transmits the encrypted public key. Receiving the electronic information encrypted by the public key decrypted by the mobile communication network, and decrypting the electronic information by the secret key. Can be used on terminals.

[0034]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a sequence diagram of a first embodiment of the present invention. FIG. 2 is a configuration diagram of the network according to the first embodiment.

The network center 1 is a computer provided in a mobile communication network (not shown), and performs a subscriber authentication, a billing process, and the like. The mobile communication network has an e-mail system (not shown) so that the mobile mobile terminals 2 of the subscriber can send and receive e-mails.

The network center 1 is characterized in that it provides electronic information and electronic information in response to an electronic information acquisition request from a mobile mobile terminal 2 used by a subscriber (for example, mobile mobile terminal 2A of subscriber A). When acquiring and transmitting the electronic information from the electronic information server 3, the electronic information is encrypted with a common key used for authentication of the mobile portable terminal 2A of the transmission destination.

The mobile portable terminal 2 is provided with a common key used for authentication in a mobile communication network. As a feature, the mobile information terminal 2 encrypts electronic information with this common key and writes it on a recording medium (medium), or another terminal. (Such as a personal computer). Also, the electronic information encrypted with the common key is read from a recording medium, or received from another terminal and decrypted with the common key.

FIG. 3 is a diagram showing functions of the network center 1 and the mobile terminal 2. These are realized by executing the electronic information processing program according to the present invention in the network center 1 or the mobile portable terminal 2.

The network center 1 has an “encryption function using a common key” for encrypting electronic information using a common key, and a “transmission / reception function between a center and a mobile terminal” for transmitting / receiving electronic information to / from a mobile terminal. Having. Note that the electronic information refers to characters, images, audio, or digital data obtained by combining these.

The mobile portable terminal 2 has an “encryption function using a common key” for encrypting electronic information with a common key, and a “transmission / reception function between the center and mobile portable terminal” for transmitting / receiving electronic information to / from a network center. "Decryption function using common key" for decrypting electronic information using common key, and mobile portable terminal 2
A "recording medium read / write function" for reading and writing electronic information to and from a recording medium mounted on the PC; an "infrared transmitting / receiving function" for transmitting and receiving electronic information to and from another terminal according to an infrared communication standard; A "short-range wireless transmission / reception function" that transmits and receives electronic information to and from other terminals according to wireless communication standards, and a "home wireless transmission and reception function" that transmits and receives electronic information to and from other terminals according to home wireless communication standards function"
And an "e-mail reading / writing function" for transmitting and receiving electronic information as a text or an attached file of the e-mail.

Next, referring to FIG. 1, the sequence between the network center 1, the mobile portable terminal 2A used by the subscriber A, the electronic information server 3 for providing electronic information providing service, and the recording medium Will be described.

Mobile portable terminal 2A and network center 1
Implements a common encryption algorithm. The mobile portable terminal 2A stores a terminal-specific common key Ka, and the network center stores the common key Ka. The process of FIG. 6 is performed for subscriber authentication during a call. Here, it is assumed that the subscriber has been authenticated.

The mobile portable terminal 2A is connected to the network center 1
In response to the request for electronic information by the “transmission / reception function between the center and the mobile terminal”,
Requests the electronic information server 3 to acquire the electronic information. The electronic information server 3 transmits the requested electronic information (plain text) to the network center 1.

The network center 1 encrypts the electronic information (plaintext) with the common key Ka in the network center 1 using the “encryption function using a common key”, and converts the encrypted electronic information (ciphertext) to the “center / ciphertext”. The transmission / reception function between mobile portable terminals "transmits to the mobile portable terminal 2A.

The mobile portable terminal 2A decrypts the electronic information (encrypted text) transmitted from the network center 1 with the common key Ka in the mobile portable terminal 2A by using a "decryption function using a common key" to convert the electronic information (plaintext). get.

When electronic information is stored in the recording medium, the mobile portable terminal 2A uses the “encryption function using a common key”.
To encrypt the electronic information (plaintext) and write it to the recording medium by the "recording medium reading / writing function".

When referring to the electronic information (encrypted text) stored in the recording medium, the electronic information (encrypted text) is read from the recording medium by the "recording medium read / write function", and is read by the "common key". Decryption function ".

When electronic information is stored in another mobile portable terminal or the like, the mobile portable terminal 2A encrypts the electronic information (plain text) by the "encryption function using a common key", and transmits the "infrared transmission / reception function", The data is transmitted to a mobile terminal or the like by the “distance wireless transmission / reception function”, “home wireless transmission / reception function” or “e-mail reading / writing function”.

When referring to electronic information (encrypted text) stored in another mobile portable terminal or the like, the mobile portable terminal or the like can use the "infrared transmitting / receiving function", "short distance wireless transmitting / receiving function", "home use". Electronic information (encrypted text) is received by the internal wireless transmission / reception function or the e-mail reading / writing function,
This is decrypted by the “decryption function using a common key”.

As described above, according to the first embodiment, a mobile portable terminal encrypts electronic information with a key used for authentication in a mobile communication network and writes it on a recording medium, or other terminal. , Copyright infringement on a recording medium or another terminal can be prevented.

The mobile portable terminal reads electronic information encrypted with a key used for authentication in a mobile communication network from a recording medium or receives electronic information from another terminal and decrypts it with the key. Alternatively, electronic information for which copyright infringement is prevented in another terminal can be used in a mobile portable terminal.

Further, a mobile communication network (that is, a network center) for transmitting electronic information to the mobile portable terminal which has requested the acquisition encrypts the electronic information with a key used for authentication of the destination mobile mobile terminal. Therefore, copyright infringement during transmission can be prevented.

Note that the mobile communication network is managed by a specific communication company, unlike the Internet, which connects networks managed by several organizations. Therefore, even in the case where the mobile portable terminal is provided with a function of concealing electronic information, there is a strong demand to use the subscriber authentication mechanism, and the first embodiment is useful from this viewpoint.

[Second Embodiment] FIG. 4 shows a second embodiment of the present invention.
FIG. 7 is a sequence diagram of the embodiment. FIG. 5 is a diagram illustrating functions of the network center 10 and the mobile portable terminal 20. The configuration of the network is the same as that of FIG.

As shown in FIG. 5, the network center 1
0 is a “public key encryption function” that encrypts electronic information using a public key in addition to the function of the network center 1.
Having. On the other hand, the mobile mobile terminal 20 (for example, the mobile mobile terminal 20A) has a “decryption function using a secret key” for decoding electronic information using a secret key, in addition to the functions of the mobile mobile terminal 2. Note that these are also realized by executing the electronic information processing program according to the present invention in the network center 1 or the mobile portable terminal 2.

The network center 10 is characterized in that electronic information is encrypted with a public key paired with a secret key used in a destination mobile portable terminal. Further, the public key is obtained in advance from the mobile mobile terminal of the transmission destination.

On the other hand, the mobile portable terminal 20 includes a secret key and a public key paired with the secret key.
This public key is encrypted with a common key used for authentication in the mobile communication network, transmitted, and the electronic information encrypted with the public key decrypted in the mobile communication network is received, and decrypted with the private key. It is supposed to.

Next, the sequence of the second embodiment will be described with reference to FIG. A common encryption algorithm is implemented in the mobile portable terminal 20A and the network center 1. The mobile portable terminal 2A stores a terminal-specific common key Ka, and the network center stores the common key Ka. The mobile portable terminal 20A stores a public key Ea and a secret key Da paired with the public key Ea.

The process shown in FIG. 6 is performed for subscriber authentication during a call. Here, it is assumed that the subscriber has been authenticated.

Next, referring to FIG. 5, network center 10 and mobile portable terminal 20 (20
The sequence between A) and the electronic information server 3 that provides the electronic information providing service will be described.

An algorithm of a common encryption system is mounted on the mobile portable terminal 20A and the network center 10.
The mobile portable terminal 20A stores a common key Ka unique to the terminal,
The network center stores the common key Ka.
The process of FIG. 6 is performed for subscriber authentication during a call. Here, it is assumed that the subscriber has been authenticated.

At the time of request for obtaining electronic information, the mobile terminal 2
0A first encrypts the public key Ea with the common key Ka in the mobile portable terminal 20A using the “encryption function using the common key”, and transmits the encrypted electronic key to the network center 10 using the “transmit / receive function between the center and the mobile portable terminal”. Request information acquisition.

The network center 10 requests the electronic information server 3 to acquire the electronic information. The electronic information server 3 transmits the requested electronic information (plain text) to the network center 10.

Before encrypting the electronic information (plaintext), the network center 10 converts the public key Ea (ciphertext) from the mobile terminal 20A into a common key in the network center 10 by using a “decryption function using a common key”. Decrypt with Ka.

Then, the network center 10 encrypts the electronic information (plaintext) with the public key Ea (plaintext) using the “encryption function using the public key”, and transmits the electronic information (ciphertext) between the center and the mobile portable terminal. The transmission / reception function "transmits to the mobile portable terminal 20A.

The mobile portable terminal 20A obtains the electronic information (plaintext) by decrypting the electronic information (ciphertext) transmitted from the network center 10 with the secret key Da by the "decryption function using the secret key".

When the electronic information obtained in this way is stored in a recording medium or another terminal, the electronic information is kept secret by encryption and decryption using a common key as in the first embodiment. be able to. The public key E
The electronic information may be encrypted with a, and the encrypted electronic information may be decrypted with the secret key Da.

As described above, according to the second embodiment, a mobile communication network (that is, a network center) that transmits electronic information to a mobile portable terminal that has requested acquisition is provided.
Since the electronic information is encrypted with the public key paired with the secret key used in the destination mobile portable terminal, copyright infringement during transmission can be prevented.

Further, since the mobile communication network acquires the public key from the mobile portable terminal of the transmission destination in advance, it is necessary to store the public key in the mobile communication network in advance to prevent copyright infringement during transmission. Disappears.

Further, the mobile portable terminal encrypts the public key paired with the secret key with a common key used for authentication in the mobile communication network, transmits the encrypted public key, and decrypts the public key in the mobile communication network. Since the electronic information encrypted by the public key is received and decrypted by the secret key, the electronic information whose copyright is prevented from being infringed during transmission can be used in the mobile portable terminal.

The electronic information processing program according to the present invention can be recorded on a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, a magnetic tape, or via a communication network such as the Internet. It can be transmitted and distributed widely.

[0072]

As described above, according to the present invention,
A useful method for preventing infringement of copyright in a mobile portable terminal or a mobile communication network can be provided.

[Brief description of the drawings]

FIG. 1 is a sequence diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a network according to the first embodiment.

FIG. 3 is a diagram illustrating functions of a network center 1 and a mobile portable terminal 2;

FIG. 4 is a sequence diagram according to the second embodiment of the present invention.

FIG. 5 is a diagram showing functions of a network center 10 and a mobile portable terminal 20;

FIG. 6 is a sequence diagram showing subscriber authentication in a mobile communication network.

[Explanation of symbols]

1, 10, 100 Network center 2 (2A), 20 (20A), 200 (200A, 20
0B) Mobile portable terminal 3 Electronic information server

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04L 9/00 601F F term (reference) 5B017 AA07 BA07 CA16 5J104 AA04 AA07 AA16 EA06 EA18 KA02 KA04 NA02 PA02 PA07 5K067 AA32 AA35 BB02 BB21 CC04 DD17 DD52 DD53 EE02 EE10 EE16 FF02 FF23 FF25 HH22 HH36 KK13 KK15

Claims (18)

[Claims] An electronic information processing method performed by a mobile portable terminal having a key used for authentication in a mobile communication network, wherein the electronic information is encrypted with the key and written on a recording medium, or transmitted to another terminal. An electronic information processing method characterized by transmitting. 2. An electronic information processing method performed by a mobile portable terminal having a key used for authentication in a mobile communication network, wherein electronic information encrypted with the key is read from a recording medium.
Or, an electronic information processing method characterized by receiving from another terminal and decoding with the key. 3. An electronic information processing method performed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition, wherein the electronic information is a key used for authentication of a destination mobile mobile terminal. An electronic information processing method, wherein the electronic information processing method is used for encryption. 4. An electronic information processing method performed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition, wherein the electronic information is stored in a secret key used by a destination mobile mobile terminal. An electronic information processing method characterized by encrypting with a public key paired with a public key. 5. The electronic information processing method according to claim 4, wherein the public key is obtained in advance from a mobile portable terminal of a transmission destination. 6. An electronic information processing method performed by a mobile portable terminal authenticated in a mobile communication network when acquiring electronic information, wherein a public key paired with a secret key is authenticated in the mobile communication network. And transmitting the encrypted electronic information with the public key decrypted by the mobile communication network and decrypting the electronic information with the secret key. Method. 7. An electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network, wherein the electronic information is encrypted with the key and written on a recording medium.
Alternatively, an electronic information processing program transmitted to another terminal. 8. An electronic information processing program executed by a mobile portable terminal provided with a key used for authentication in a mobile communication network, wherein the electronic information encrypted with the key is read from a recording medium, or read from another storage medium. An electronic information processing program, which is received from a terminal and decrypted with the key. 9. An electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition, wherein the electronic information is stored in a key used for authentication of a destination mobile mobile terminal. An electronic information processing program, characterized in that the electronic information processing program encrypts the information. 10. An electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition, wherein the electronic information is stored in a secret key used by a destination mobile mobile terminal. An electronic information processing program, wherein the electronic information processing program is encrypted with a public key paired with the electronic key. 11. The electronic information processing program according to claim 10, wherein the public key is obtained in advance from a mobile portable terminal of a transmission destination. 12. An electronic information processing program executed by a mobile portable terminal authenticated in a mobile communication network when acquiring electronic information, wherein a public key forming a pair with a secret key is authenticated in the mobile communication network. And transmitting the encrypted electronic information with the public key decrypted by the mobile communication network and decrypting the electronic information with the secret key. program. 13. A recording medium storing an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network, wherein the electronic information is encrypted with the key and written on the recording medium. Or a recording medium on which an electronic information processing program is transmitted to another terminal. 14. A recording medium storing an electronic information processing program executed by a mobile portable terminal having a key used for authentication in a mobile communication network, wherein the electronic information encrypted with the key is recorded on a recording medium. A recording medium on which an electronic information processing program is read, or read from another terminal and decrypted with the key. 15. A recording medium storing an electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal which has requested acquisition, wherein the electronic information is stored in a storage medium.
A recording medium storing an electronic information processing program, wherein the electronic information processing program is encrypted with a key used for authentication of a destination mobile portable terminal. 16. A recording medium on which an electronic information processing program executed by a mobile communication network for transmitting electronic information to a mobile portable terminal that has requested acquisition is recorded.
A recording medium on which an electronic information processing program is recorded, wherein the electronic information processing program is encrypted with a public key paired with a secret key used in a destination mobile portable terminal. 17. The recording medium according to claim 16, wherein the public key is obtained in advance from a destination mobile portable terminal. 18. A recording medium in which an electronic information processing program to be executed when a mobile portable terminal authenticated in a mobile communication network acquires electronic information is recorded, wherein a public key forming a pair with a secret key is transferred to the mobile terminal. Transmitting and encrypting with a common key used for authentication in a mobile communication network, receiving electronic information encrypted with the public key decrypted in the mobile communication network, and decrypting with the secret key. A recording medium on which a characteristic electronic information processing program is recorded.