Method for generating, providing and reproducing digital contents in conjunction with digital currency, and terminal and computer readable recording medium using same

A method for a user terminal playing at least one technically protected digital content, comprising steps of:

• (a) the user terminal acquiring information on the digital content in which (i) information on a public key or (ii) pointing information indicating the information on the public key is embedded, wherein the information on the public key or the pointing information is required for a digital content provider to receive digital money;
• (b) the user terminal creating payment information by using the public key and its private key;
• and
• (c) upon determining that the payment information is true, the user terminal receiving a support to remove a state of restriction on the use of the digital content from a content providing terminal to thereby allow a user of the user terminal to play the digital content;
• wherein the payment information is created by digitally signing in use of the information on the private key of the user terminal after acquiring the information on the public key embedded in the digital content and information on digital money owned by a user who holds the user terminal;
• and
• wherein upon creation of the payment information, the user terminal broadcasts the payment information to multiple other terminals, and receives from the multiple other terminals information on verification as to whether the payment information is true or not.

A method for a content creating terminal creating at least one technically protected digital content, comprising steps of:

• (a) the content creating terminal embedding, in the digital content, (i) information on a public key or (ii) pointing information indicating the information on the public key, wherein the information on the public key or the pointing information is required for a digital content provider to receive digital money;
• and
• (b) upon detecting from the user terminal that a specific condition has been satisfied relating to embedded information on the public key, the content creating terminal supporting removal of a state of restriction on the use of the digital content to allow the digital content to be played through a user terminal,
• wherein the digital content in which the information on the public key is embedded is acquired by the user terminal and payment information is created by digitally signing in use of the information on the private key of the user terminal after acquiring the information on the public key embedded in the digital content and information on digital money owned by a user who holds the user terminal;
• wherein the specified condition includes a condition that the payment information is true;
• wherein upon creation of the payment information, the user terminal broadcasts the payment information to multiple other terminals, and receives from the multiple other terminals information on verification as to whether the payment information is true or not;
• and
• wherein upon determination that the payment information is true from at least some of the multiple other terminals, a digital money transaction is allowed to be recorded in public database.

A content providing terminal for providing at least one technically protected digital content, comprising:

• a digital content information managing part embodied as one or more processors, the digital content information managing part for providing the digital content in which (i) information on a public key or (ii) pointing information indicating the information on the public key is embedded, wherein the information on the public key or the pointing information is required for a digital content provider to receive digital money;
• and
• upon receipt of payment information created by a user terminal using (i) the public key associated with the digital content and (ii) a private key of the user terminal, and upon determination that the created payment information is valid, a play managing part embodied as one or more processors for supporting removal of a state of restriction on the use of the digital content to allow the user terminal to play the digital content;
• wherein the payment information is created by digitally signing in use of the information on the private key of the user terminal after acquiring the information on the public key embedded in the digital content and information on digital money owned by a user who holds the user terminal;
• wherein upon creation of the payment information, the user terminal broadcasts the payment information to multiple other terminals, and receives from the multiple other terminals information on verification as to whether the payment information is true or not;
• and
• wherein upon determination that the payment information is true from at least some of the multiple other terminals, a digital money transaction is allowed to be recorded in public database.

A user terminal for playing at least one technically protected digital content, comprising:

• a metadata acquiring part embodied as one or more processors for acquiring information on the digital content in which (i) information on a public key or (ii) pointing information indicating the information on the public key is embedded, wherein the information on the public key or the pointing information is required to make a digital content provider receive digital money;
• a payment information managing part embodied as one or more processors for creating payment information by using the public key and a private key of the user terminal;
• upon determining that the payment information is true, a play managing part embodied as one or more processors for receiving a support to remove a state of restriction on the use of the digital content from a content providing terminal to thereby allow a user of the user terminal to play the digital content;
• wherein the payment information is created by digitally signing in use of the information on the private key of the user terminal after acquiring the information on the public key embedded in the digital content and information on digital money owned by a user who holds the user terminal;
• and
• wherein upon creation of the payment information, the user terminal broadcasts the payment information to multiple other terminals, and receives from the multiple other terminals information on verification as to whether the payment information is true or not.

A content creating terminal for creating at least one digital content, comprising:

• a public key information inserting part embodied as one or more processors for embedding, in the digital content, (i) information on a public key or (ii) pointing information indicating the information on the public key, wherein the information on the public key or the pointing information is required for a digital content provider to receive digital money;
• and
• upon detecting from the user terminal that a specific condition has been satisfied relating to embedded information on a public key, a licensing part embodied as one or more processors for supporting removal of a state of restriction on the use of the digital content to allow the digital content to be played through a user terminal,
• wherein the digital content in which the information on the public key is embedded is acquired by the user terminal and payment information is created by digitally signing in use of the information on the private key of the user terminal after acquiring the information on the public key embedded in the digital content and information on digital money owned by a user who holds the user terminal;
• and
• wherein the specified condition includes a condition that the payment information is true;
• wherein upon creation of the payment information, the user terminal broadcasts the payment information to multiple other terminals, and receives from the multiple other terminals information on verification as to whether the payment information is true or not;
• and
• wherein upon determination that the payment information is true from at least some of the multiple other terminals, a digital money transaction is allowed to be recorded in public database.