Samsung Electronics Co., Ltd.

Mi-suk Huh

Weon-il Jin

Kyung-Hee Lee

Bum-Jin Im

Maeng-hee Sung

Bae-eun Jung

Dae-youb Kim

Hwan-joon Kim

Tae-Chul Jung

Sergey Bezzateev

Hee-kwan Lee

Alexey Sitalov

Seog-chung Seo

Chan-yul Kim

Kwang-pyo Choi

Dong-Chan Kim

Alexey Fomin

Kyung-hee Lee

Evgeny Krouk

Sergei Bezzateev

Alexandra Afanasyeva

Se-il Kim

Wong Marcus

Evgny Linsky

Mikhail Stepanov

Bum-jin Im

Chang-woo Seo

Disclosed is a method of performing, by a first device, short-range wireless communication with a second device, the method including receiving, from the second device, second authentication information encrypted using first authentication information of the first device, decrypting the encrypted second authentication information by using the first authentication information, determining a secret key based on the decrypted second authentication information, and performing communication between the first device and the second device by using the determined secret key.

Method for communication between devices and devices thereof

A method performed by a first device to establish a connection to a second device includes: obtaining identification information of the second device by using a first communication method; obtaining the identification information of the second device by using a second communication method; obtaining first distance information regarding the second device based on characteristics of the first communication method and the second communication method; and determining whether to transmit a connection request to the second device based on the obtained first distance information.

Method for establishing connection between devices

The present disclosure relates to technologies for a sensor network, machine-to-machine (M2M) communication, machine type communication (MTC), and an Internet of Things (IoT) network. The present disclosure may be used in intelligence services based on such technologies (smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, and security and safety-related services). Provided is a method of transmitting encrypted data for preventing identification of transmitting and receiving devices, from a first device to a second device, the method including: generating an encryption key for encrypting data; generating key identification information by using the generated encryption key and encrypting the data; and transmitting a data set including the encrypted data and the key identification information to the second device.

Method, apparatus and system for secure data communication

Provided is a method, performed by a first device, of sharing a key, the method including: determining a communication method for exchanging a key between the first device and a second device, based on pre-set channel ranking information; receiving a key of the second device from the second device by using the determined communication method; and authenticating the received key of the second device.

Key sharing method and device

A method and system for protecting a broadcast frame are provided. A frame broadcasted through a packet switching network is protected and a wireless LAN system is included. A current frame is authenticated based on a TESLA scheme. The authentication of the broadcast frame can be performed without a time difference.

Method for protecting broadcast frame

An apparatus and method are provided for reducing time taken for generating a digital signature and generating the digital signature using a minimum number of operations using at least two secret keys. One secret key among at least two secret keys may be set from a value resulting from hashing a message to be transmitted. A number of times for hashing the secret key is determined, and a value resulting from hashing the determined secret key by the determined hashing number of times is set as the digital signature.

Method and apparatus for digital signature generation and validation

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

Provided is an apparatus for encryption/decryption and electronic signature in a mobile communication environment. A signal processing apparatus, performing modular multiplication in an electronic device, includes a first logic for outputting a signed multiplicand by selectively performing a one's complementary operation on a multiplicand according to a Booth conversion result of a multiplier in modular multiplication; a second logic for outputting a modulus which is signed in the modular multiplication based on a carry input value Carry-in of a current clock, determined from a carry value cin for correction of a previous clock, and on a sign bit of the multiplicand; and a third logic for receiving the signed multiplicand and the signed modulus, and calculating a result value of the modular multiplication by iteratively performing a full addition operation on a carry value C and a sum value S of the full addition operation, found at the previous clock.

Signal processing apparatus and method for performing modular multiplication in an electronic device, and smart card using the same

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

Disclosed are a method and apparatus capable of reducing the number of computations required to generate a digital signature by a digital signature generator. A digital signature generator generates a code word for a received message by a function F for generating a code word having a set weight value and generates a digital signature based on the generated code word and an inverse of a public parity check matrix H, the parity check matrix H is one way function. A digital signature receiver converts the received message using the function F for generating a code word, and multiplies a public parity check matrix H by a received digital signal, the public parity check matrix H is a one way function, and comparing the converted value with the multiplication result.

Method and apparatus for generating and verifying digital signature

A radio frequency identification (RFID) tag encryption method and system using a broadcast encryption (BE) scheme are provided by encrypting an ID of an RFID tag, storing the encrypted ID in a server and the RFID tag, and storing information relating to a reader authorized to read out the RFID tag in the server so that the reader can read out the RFID tag by decrypting the encrypted ID based on the encrypted ID information read from the RFID tag and the reader information. When readers read out ID data from the RFID tag, a privileged reader can read the data. Thus, it is possible to block unintended information leakage to the readers. In addition, user usability can be enhanced since an attacker cannot perform an access lock on the RFID tag.

Radio frequency identification (RFID) tag encryption method and system using broadcast encryption (BE) scheme

A signal processing apparatus for performing modular multiplication for use in a signal processing system includes a first logic for outputting a signed multiplicand by selectively performing a one's complementary operation on a multiplicand according to a Booth conversion result of a multiplier in modular multiplication; a second logic for outputting a modulus which is signed in the modular multiplication based on a carry input value Carry-in of a current clock, determined from a carry value cin for correction of a previous clock, and on a sign bit of the multiplicand; and a third logic for receiving the signed multiplicand and the signed modulus, and calculating a result value of the modular multiplication by iteratively performing a full addition operation on a carry value C and a sum value S of the full addition operation, found at the previous clock. The present invention provides a high-speed modular multiplication apparatus with fewer gates and reduced power consumption.

Apparatus and method for performing Montgomery type modular multiplication

A method and apparatus to square an element A when a defining polynomial of a finite field GF(2) is expressed as and the element A contained in the finite field is expressed as A=(a,a,a, . . . ,a)&#x2208;GF(2). The method determines coefficients m, I, V, V, and V such that the coefficient msatisfies a predetermined condition with respect to kwhen 1&#x2266;i&#x2266;t is a natural number, Idepends on n, k, and j when 2&#x2266;j&#x2266;m, Vand Vof n bits, respectively, depend on n, I, and k, and obtains the coefficient V with respect to maccording to the following formula determines a coefficient saccording to kand n and cyclically shifts the coefficient V by s; performing an XOR operation on the cyclically shifted coefficient V and the element A; and rewires a result of the XOR operation in a predetermined order and outputs results of the squaring.

Method and apparatus to perform squaring operation in finite field

A method of obtaining C=(c, . . . , c) of a product of two elements A and B of a finite field GF(2). The method includes permuting the last d coefficients (a, . . . , a) of a multiplier A with predetermined variables (s, . . . , s); operating C:C=&#x2295;(b&#x25cf;A) for (I+j)coefficient of a multiplicand B to update coefficients of C, where i and j are integers, and A:=(s)&#x2295;(0,x&#x25cf;f, . . . ,s&#x25cf;f,0, . . . ,0) repeatedly for j=0 to (d&#x2212;1) to update coefficients of A, where &#x2295; represents an XOR operation and &#x25cf; represents an AND operation; and repeatedly performing the permuting and operating by increasing i from 0 to (n&#x2212;1) by d.

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Suwon-si, South Korea

Mi-suk Huh