Abstract: There is provided a device for transmitting a push-to-talk message. The device includes a communication interface, and an operation processor that transmits a first segment group of the PTT message among segments of the PTT message to first to n-th PTT devices through the communication interface; transmits a heartbeat signal to the first to n-th PTT devices through the communication interface; receives an i-th response signal to the heartbeat signal from an i-th PTT device through the communication interface; allocates, based on the i-th response signal, the i-th PTT device to a first group to which a second segment group of the PTT message is transmitted without any conversion or a second group to which data obtained by converting the second segment group is transmitted; and transmits the second segment group to the first group and the data to the second group through the communication interface.

Abstract: An Internet of Things (IoT) device includes a first memory disposed in a normal zone; a first driver disposed in the normal zone; and a second driver disposed in a secure zone. The first driver is configured to perform: (a) monitoring the first memory to generate data change information of the first memory, the data change information being information on changes of data in the first memory; (b) transmitting the data change information to the second driver; and (c) controlling an operating state of the IoT device based on an instruction for the operating state received from the second driver. The second driver is configured to perform: (d) transmitting the data change information to a specified IoT device management system; and (e) receiving the instruction for the operating state from the IoT device management system and transmitting the instruction for the operating state to the first driver.

Abstract: According to one aspect of the technique of the present disclosure, there is provided a method for securely communicating data. The method includes: (a) establishing a first encryption scheme, a data integrity checking scheme, an encryption key and an authentication key through a communication connection with a receiver; (b) generating a random key; (c) generating secure data including random key information obtained by encrypting the random key using the encryption key and the first encryption scheme; authentication information generated based on the random key, the data integrity checking scheme and the authentication key; and data information obtained by encrypting data using the random key and a second encryption scheme whose operation load is lower than that of the first encryption scheme; and (d) transmitting the secure data to the receiver.

Abstract: An apparatus for monitoring a multicast group is provided. The apparatus includes a storage, a receiver and an operation processor. The storage is configured to store first data including a first authenticated message authenticated as being published by a publisher of the multicast group to n-th data including an n-th authenticated message authenticated as being published by the publisher where n is a natural number of 2 or more. The receiver is configured to receive status data including a first propagation message to be delivered to the multicast group. Further, the operation processor is configured to generate monitoring information including status information of the multicast group by using the status data and the first to n-th data.

Abstract: A method for receiving firmware including pieces of firmware data is provided. The method is performed by a first apparatus in a multicast group including at least the first apparatus and a second apparatus. The method includes (a) receiving first meta-information for the firmware data from the second apparatus, (b) generating, based on the first meta-information, second meta-information for at least one piece of firmware data to be used to apply the firmware to the first apparatus, among the firmware data, and (c) receiving, based on the second meta-information, the at least one piece of firmware data from a firmware providing apparatus or the second apparatus. The first meta-information includes at least history information including version and partitioning information for each of the pieces of firmware data, and the second meta-information includes at least the history information for each of the at least one piece of firmware data.

Abstract: A method includes (a) receiving i-th data among first to n-th data transmitted in a multicast manner from a firmware providing apparatus, (b) acquiring partitioning information thereof, a MAC chaining value, length information, i-th firmware data, and MAC from the i-th data, (c) authenticating the MAC chaining value of the i-th firmware data, the length information, and the i-th firmware data by comparing a MAC of the i-th firmware data with a value computed by a first MAC generation algorithm, which uses the MAC chaining value of the i-th firmware data, the length information, and the i-th firmware data as a relevant input; (d) authenticating the order of the i-th firmware data by using the MAC chaining value of the i-th firmware data and a second MAC generation algorithm; and (e) obtaining the firmware by combining a first to an n-th firmware data obtained by executing (a) to (d).

Abstract: According to one aspect of the technique of the present disclosure, there is provided a device in a network including: a storage in a secure zone to store encryption algorithms, information generators, and keys; and an operation processor in the secure zone. When the device operates as a master device, the operation processor selects at least one of an encryption algorithm, an information generator or a key used for encrypted communication within the network, generates profile information including at least one of identification information of the encryption algorithm, the information generator or the key, and transmits the profile information to another device in the network. When the device does not operate as the master device, the operation processor receives the profile information from the master device, and designates based thereon at least one of the encryption algorithm, the information generator or the key used for the encrypted communication.

Abstract: An Internet of Things (IoT) device includes a first memory disposed in a normal zone; a first driver disposed in the normal zone; and a second driver disposed in a secure zone. The first driver is configured to perform: (a) monitoring the first memory to generate data change information of the first memory, the data change information being information on changes of data in the first memory; (b) transmitting the data change information to the second driver; and (c) controlling an operating state of the IoT device based on an instruction for the operating state received from the second driver. The second driver is configured to perform: (d) transmitting the data change information to a specified IoT device management system; and (e) receiving the instruction for the operating state from the IoT device management system and transmitting the instruction for the operating state to the first driver.

Abstract: A gateway apparatus for a RoIP network includes a secure memory, a first communication interface for transmitting and receiving data to and from terminals in the RoIP network, a second communication interface for transmitting and receiving data to and from a home subscriber server of a mobile communication network, and an operation processor.

Abstract: A device in a multicast group includes an encryptor/decryptor, a key storage, a security interface and a data processing requestor. The security interface performs receiving and storing a group key and a publisher key from and in the key storage when the device is registered as a publisher, and receiving and storing the group key from and in the key issuing when the device is registered as a subscriber; receiving a request for encrypting first data from the data processing requestor; determining whether the device is an authorized publisher; and transmitting the first data and the read group key to the encryptor/decryptor when the result of the determining indicates the device is the authorized publisher; receiving a first encrypted data generated by encrypting the first data using the group key; and transmitting the first encrypted data to the data processing requestor.

Abstract: A push-to-talk device is provided. The push-to-talk device includes a communication interface, a storage configured to store identification information of a plurality of push-to-talk devices included in a network group, and an operation processor electrically connected to the communication interface and the storage. The operation processor is configured to (a) designate one or more push-to-talk devices that are allowed to subscribe to a first message among the plurality of push-to-talk devices, and (b) transmit the first message to the plurality of push-to-talk devices by using a publisher-subscriber pattern through the communication interface.

Abstract: A dedicated artificial intelligence system for enterprise business process is provided.

Abstract: A universal subscriber identity module (USIM) management device includes a communication interface, a storage configured to store an issue date indicating a date on which a USIM is installed into an industrial communication terminal, and an operation processor. The operation processor is configured to execute: (a) receiving the issue date from at least one among the industrial communication terminal and a subscriber management system in a mobile communication network to which the industrial communication terminal is connected, and storing the received issue date in the storage; (b) receiving USIM usage information from the industrial communication terminal through the communication interface; and (c) determining whether to replace the USIM based on the issue date and the USIM usage information.

Abstract: A universal subscriber identity module (USIM) management device includes a communication interface, a storage configured to store an issue date indicating a date on which a USIM is installed into an industrial communication terminal, and an operation processor. The operation processor is configured to execute: (a) receiving the issue date from at least one among the industrial communication terminal and a subscriber management system in a mobile communication network to which the industrial communication terminal is connected, and storing the received issue date in the storage; (b) receiving USIM usage information from the industrial communication terminal through the communication interface; and (c) determining whether to replace the USIM based on the issue date and the USIM usage information.

Abstract: A device in a multicast group includes an encryptor/decryptor, a key storage, a security interface and a data processing requestor. The security interface performs receiving and storing a group key and a publisher key from and in the key storage when the device is registered as a publisher, and receiving and storing the group key from and in the key issuing when the device is registered as a subscriber; receiving a request for encrypting first data from the data processing requestor; determining whether the device is an authorized publisher; and transmitting the first data and the read group key to the encryptor/decryptor when the result of the determining indicates the device is the authorized publisher; receiving a first encrypted data generated by encrypting the first data using the group key; and transmitting the first encrypted data to the data processing requestor.

Abstract: An apparatus for monitoring a multicast group is provided. The apparatus includes a storage, a receiver and an operation processor. The storage is configured to store first data including a first authenticated message authenticated as being published by a publisher of the multicast group to n-th data including an n-th authenticated message authenticated as being published by the publisher where n is a natural number of 2 or more. The receiver is configured to receive status data including a first propagation message to be delivered to the multicast group. Further, the operation processor is configured to generate monitoring information including status information of the multicast group by using the status data and the first to n-th data.

Abstract: Disclosed herein is an Internet of things (IoT) device which is capable of defending against an attack such as hacking while strengthening security of IoT by dynamically determining whether to operate as a master device in an IoT network, and, when the master device is determined, generating, distributing, and managing private keys of other IoT devices in the IoT network.

Abstract: Disclosed herein is an Internet of things (IoT) device which is capable of defending against an attack such as hacking while strengthening security of IoT by dynamically determining whether to operate as a master device in an IoT network, and, when the master device is determined, generating, distributing, and managing private keys of other IoT devices in the IoT network.