Content providing apparatus and method, content using apparatus and method, and content providing apparatus and method for revoking content using apparatus

An apparatus for providing content in at least one packet, the apparatus comprising:

• a storage unit which stores the content of the at least one packet;
• a secret set generator which generates an integrity check key for determining an integrity of the content for every packet using information in the packet, and generates a secret set, which includes the integrity check key generated for the every packet;
• a packetizer which generates a transport packet by packetizing the secret set with the content;
• and
• a transmitter which transmits the transport packet.

A method of using content in at least one packet, the method comprising:

• receiving a transport packet including the content in the at least one packet and a secret set, wherein the secret set includes an integrity check key generated for determining integrity of the content using information in the at least one packet;
• storing the secret set extracted by processing the transport packet;
• determining based on the secret key whether the at least one packet having the content maintains integrity;
• and
• processing the at least one packet, if it is determined that the at least one packet having the content maintains integrity.

An apparatus for using content in at least one packet, the apparatus comprising:

• a receiver which receives a transport packet including the content in the at least one packet and a secret set, which includes an integrity check key, which is generated using information in the at least one packet, for determining an integrity of the content, and extracts the secret set by processing the transport packet;
• a storage unit in which the secret set is stored;
• a controller which determines, based on the secret set, whether the at least one packet having the content maintains integrity;
• and
• a data processing unit which processes the at least one packet, if the controller determines that the at least one packet having the content maintains integrity.

A computer readable recording medium storing a computer readable program for executing a method of providing content in at least one packet, the method comprising:

• generating an integrity check key for determining an integrity of the content of the at least one packet using information in the at least one packet;
• generating a secret set, which includes the integrity check key generated for the at least one packet;
• generating a transport packet by packetizing the secret set with the content;
• and
• transmitting the transport packet.

A computer readable recording medium storing a computer readable program for executing a method of using content in at least one packet, the method comprising:

• receiving a transport packet including the of the at least one packet and a secret set, wherein the secret set includes an integrity check key generated for determining integrity of the content in the at least one packet;
• storing the secret set extracted by processing the transport packet;
• determining, based on the secret set, whether the at least one packet having the content maintains integrity;
• and
• processing the at least one packet, if the at least one packet is determined that the at least one packet having the content maintains integrity.

A method of providing content in at least one packet, the method comprising:

• setting a secret set, which includes values generated in an authentication process between at least one authorized content using apparatus and a content providing apparatus;
• if a content using apparatus requests authentication from the content providing apparatus, determining whether a first value generated in an authentication process between the content using apparatus and the content providing apparatus exists in the secret set;
• and
• if it is determined that the first value does not exist in the secret set, revoking the content using apparatus.

An apparatus for providing content in at least one packet, the apparatus comprising:

• a storage unit which stores a secret set, which includes values generated in an authentication process with at least one authorized content using apparatus;
• an authentication unit which processes an authentication request from a content using apparatus;
• and
• a controller which determines whether a first value generated in an authentication process between the content using apparatus and the content providing apparatus exists in the secret set, and if it is determined that the first value does not exist in the secret set, revokes the content using apparatus.

A computer readable recording medium storing a computer readable program for executing a method of revoking a content using apparatus in a content providing apparatus, wherein the content using apparatus uses content in at least one packet and the content providing apparatus provides the content, the method comprising:

• setting a secret set, which includes values generated in an authentication process between at least one authorized content using apparatus and a content providing apparatus;
• if a content using apparatus requests authentication from the content providing apparatus, determining whether a value generated in an authentication process between the content using apparatus and the content providing apparatus exists in the secret set;
• and
• if it is determined that the value does not exist in the secret set, revoking the content using apparatus.

A method of providing content in at least one packet of a plurality of packets, the method comprising:

• generating an integrity check key for the at least one packet, wherein the integrity check key determines an integrity of the content for the at least one packet using information in the at least one packet;
• generating a secret set, which includes the integrity check key generated for the at least one packet;
• generating a transport packet by packetizing the secret set with the content;
• and
• transmitting the transport packet.

An apparatus for providing content in at least one packet of a plurality of packets, the apparatus comprising:

• a storage unit which stores the content of the at least one packet;
• a secret set generator which generates an integrity check key for determining an integrity of the content in the at least one packet using information in the at least one packet, and generates a secret set, which includes the integrity check key generated for the at least one packet;
• a packetizer which generates a transport packet by packetizing the secret set with the content;
• and
• a transmitter which transmits the transport packet.