Samsung Electronics Co., Ltd.

Bae-eun Jung

Mi-suk Huh

Jae-jun Lee

Weon-il Jin

Tae-sung Park

Maeng-hee Sung

Yu-sung Joo

Yo-han Kim

Ji-youn Jung

Sum Hwang

Jae-Hoon Kim

Kyung-Hee Lee

Je-Young Maeng

Dae-youb Kim

Jae-sung Park

Myung-jin Eom

Byoung-Joon Lee

Chae-hoon Lim

Hee-jean Kim

Kyung-hee Lee

Bum-Jin Im

Hae-taek Jung

Myeong-wuk Jang

Young-il Park

Bum-jin Im

Provided is a method of displaying an object on a device, the method including detecting a thumbnail image of an object corresponding to a selected position on a progress bar providing search information regarding a plurality of objects that are displayed according to an order; obtaining a user input moved from the selected position to a size change area; and displaying the thumbnail image of the object, the thumbnail image having a size determined based on a position of the user input in the size change area.

Method for displaying object on device and device therefor

Provided is a method of establishing communication between a plurality of terminals by a first client terminal of the plurality of terminals, the method including: receiving an initiation signaling message comprising a communication initiation tag and a terminal list of terminals from a host terminal of the plurality of terminals; determining whether to establish communication with the host terminal, based on a communication state of the first client terminal; generating connection information indicating whether to establish communication with the host terminal; determining a second client terminal of the plurality of terminals as a next priority terminal based on the terminal list of terminals; and transmitting the connection information and a trigger signaling message comprising a communication extension tag to the second client terminal.

Method and apparatus for establishing communication between terminals

Methods and apparatuses for setting communication with devices included in a group are provided. The method includes receiving, from a host device included in the group, a communication initiation request for setting communication between the host device and the first client device, determining whether to set communication with the host device based on a communication state of the first client device, receiving, from a second client device, a communication extension request for setting communication between the second client device and the first client device, determining whether the second client device is included in the group, and in response to the second client device being included in the group, determining whether to set communication with the second client device based on whether communication with the host device and the first client device is set.

Method and apparatus for setting communication and recording medium thereof

A method of controlling a router to transmit Content-Centric Network (CCN)-based real-time contents is provided. The method includes receiving identification information regarding real-time contents that a target device is to receive from a source device and transmitting the real-time contents to the target device, and in response to content request information which is generated based on the identification information being received from the target device, transmitting to the target device contents which correspond to the received request information.

Source device, router and control method

Provided is a method in which a first device authenticates a public key of a second device. The method includes: receiving a first value generated based on the public key of the second device and a password displayed on a screen of the second device and the public key of the second device, from the second device; generating a second value based on the public key of the second device and a password input to the first device by a user of the first device according to the password displayed on the screen of the second device; and authenticating the public key of the second device based on the first value and the second value.

Method and apparatus for authenticating public key without authentication server

A method of notifying an operation state change of a device, the method involving forming a network of devices used by a user and that perform network communication; when an operation state change of a first device in the network occurs, searching for at least one device currently being used by the user in the network of devices; and transmitting information regarding the operation state change of the first device to the at least one device, wherein the information regarding the operation state change of the first device is displayed on a display unit of the at least one device.

Device capable of notifying operation state change thereof through network and communication method of the device

A user key allocation method for broadcast encryption is provided. The user key allocation method includes generating a plurality of subsets by dividing one group including a plurality of nodes to sub-groups and allocating key sets with respect to the subsets, respectively. The nodes included in the subset may be odd nodes and even nodes of the nodes of the group. The nodes are arranged so that privileged nodes are consecutive or there is only one privileged node. Accordingly, it is possible to reduce the data size transmitted from the server to the nodes by constituting one or more subsets from the nodes consecutively arranged and providing key sets with respect to the subsets.

User key allocation method for broadcast encryption

An ownership sharing method and apparatus using a secret key in a home network remote controller are provided. A user who owns a home device generates an ownership authentication key using the secret key shared with the home device through the user's terminal device, and transmits the ownership authentication key to a terminal device of a particular user who wishes to share the ownership. The particular user can use the home device using the shared ownership authentication key, allowing for ownership of a device in home network environments based on a secret key that can be easily shared, obviating complicated calculation procedures that are no needed to share the ownership between an owner of a device and his family or customers, and achieving high security that is guaranteed based on the secret key.

Ownership sharing method and apparatus using secret key in home network remote controller

A network capable of communicating with foreign networks and having a plurality of devices capable of mutually communicating with one another and a domain setup method thereof. The network includes at least one main remote controller for, out of the devices, setting up authorization to use the respective devices belonging to at least one main domain having at least one of the devices; and at least one subsidiary remote controller for receiving authentication for authorization to use the respective device belonging to a domain having the respective devices authorized to at least one user by the respective main remote controllers. Thus, the present network enables each user to efficiently administer whether to use the home devices as well as enables the home devices authorized to each user to be set up in one domain in order to keep security and privacy from foreign domains.

Network and domain-creating method thereof

A method is provided for generating a group key, including sharing a plurality of secret keys with a plurality of nodes adjacent to a first node of the plurality of nodes, obtaining a plurality of function values using the plurality of secret keys and a result value using the plurality of function values, broadcasting the result value, receiving a plurality of result values generated using a method by which the result value has been obtained, from nodes of the plurality of nodes except for a corresponding node, and obtaining a group key using a plurality of function values extracted from the plurality of function values and the plurality of result values.

Method for generating group key

A conference session key distribution method used in an ID-based cryptographic system includes selecting two different temporary secret keys, generating a message and generating session key generation variables using the temporary secret keys of a session initiating party. Only valid participating parties receive the session key generation variables. Each party determines the session shared key from the session key generation variables.

Conference session key distribution method in an ID-based cryptographic system

An elliptic curve cryptography method which generates a public key for use in a communication encryption using an elliptic curve, including: changing a number of a secret key (d) of (k) bits to an odd number; encoding the secret key to yield an encoded secret key (d) in which a most significant bit (MSB) is (1) and a rest positional number is (1) or (&#x2212;1); and computing the public key (Q=Dp) by multiplying the encoded secret key (d) by a predetermined point (P) on the elliptic curve by a scalar multiplication.

Cryptographic method capable of protecting elliptic curve code from side channel attacks

A security system using an RSA algorithm that includes a key input section for receiving a secret key and a public key used in one of encryption and decryption of a message, a random coefficient generating section for generating a random coefficient r having a bit of a predetermined size, a first calculation section for dividing the secret key into a first secret key and a second secret key by using the value of r, and performing an exponentiation of RSA algorithm by using the respective secret keys and the public key, and a second calculation section for performing one of the encryption and the decryption by combining results of exponentiation calculated respectively by using the first and the second secret keys.

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Seongnam-si, South Korea

Bae-eun Jung