Samsung Electronics Co., Ltd.

Choong-Hoon Lee

Yong-kuk You

Jin-Mok Kim

Jun Yao

Michael Choi

Jun-bum Shin

Su-hyun Nam

Ji-Young Kim

Chang-Yeul Kwon

Yang-lim Choi

So-young Lee

Young-sun Yoon

Ji-soon Park

Seong-Soo Kim

Kyoung-Yong Lee

Il-joo Kim

Sun-nam Lee

Yong-Ho Hwang

Sang-su Choi

Soon-Kyun Shin

Hak-soo Ju

Eun-hwa Hong

Yao Jun

Yon-Won Seo

Yong-Kuk You

A fingerprint sensor includes a pixel array, an offset cancellation circuit, a correlated double sampling and integration circuit, a sample and hold circuit, and an analog-to-digital converter. The pixel array includes unit pixels arranged in rows and columns, each of which generates an analog signal by detecting a fingerprint of a user. The offset cancellation circuit receives the analog signal from the unit pixels through a plurality of column lines, and outputs one of the analog signal and an offset cancellation signal as an integration signal based on an offset control signal. The correlated double sampling and integration circuit accumulatively performs a correlated double sampling operation and an integration operation on the integration signal to generate an accumulation signal. The sample and hold circuit samples the accumulation signal based on a hold signal to generate a sampling signal. The analog-to-digital converter converts the sampling signal to a digital signal.

Fingerprint sensors and electronic devices having the same

A fingerprint sensor, comprising: a pixel array including a plurality of unit pixels arranged in rows and columns, each of the plurality of unit pixels including: a sensing electrode configured to form a detection capacitor; and a signal generation circuit configured to generate an analog signal based on a capacitance of the detection capacitor; and a controller configured to control an operation of the pixel array, wherein the controller is configured to electrically connect sensing electrodes of at least two unit pixels adjacent to each other and activate only one of the signal generation circuits included in the at least two unit pixels to generate the analog signal.

Fingerprint sensor, electronic device having the same, and method of operating fingerprint sensor

A semiconductor device includes an integrator, a successive approximation register analog-to-digital converter (SAR ADC) and a residue capacitor. The integrator is configured to receive a signal and generate a first analog signal during a first operation mode using a capacitor module comprising one or more capacitors. The SAR ADC is configured to receive the first analog signal, convert the first analog signal into a first digital signal using the capacitor module, and generate a first residue signal in a second operation mode. The residue capacitor is connected to the capacitor module in parallel, and is configured to receive the first residue signal in the second operation mode and provide the first residue signal to the integrator in the first operation mode.

Semiconductor device including integrator and successive approximation register analog-to-digital converter and driving method of the same

A method and apparatus for managing user devices and contents with quick response (QR) codes. An image of a QR code displayed on a user terminal is captured; the captured image of the QR code is analyzed, and a domain registration request message is generated based on the QR code; and the domain registration request message is transmitted to a domain server, and a domain registration response message is received from the domain server.

Method and apparatus for managing user devices and contents by using quick response codes

An analog-to-digital converter includes a digital-to-analog converting circuit, a comparator, a comparator offset detector, and a signal processing circuit. The digital-to-analog converting circuit generates a reference voltage signal that changes in response to a comparator offset compensation signal, samples and holds an analog input signal, and performs a digital-to-analog conversion on digital output data to generate a hold voltage signal. The comparator compares the hold voltage signal with the reference voltage signal in response to a clock signal to generate a comparison output voltage signal. The comparator offset detector generates the comparator offset compensation signal based on the comparison output voltage signal. The signal processing circuit performs successive approximation based on the comparison output voltage signal to generate the digital output data.

Successive approximation analog-to-digital converter and method of analog-to-digital conversion

An apparatus includes a sample holding circuit, a comparator, a digital-to-analog converter, a clock generator, a successive approximation logic circuit, and a background calibration circuit. The apparatus converts an analog signal into digital data based on an asynchronous clock signal. The clock signal follows the number of clocks in a converting operation section through a background calibration scheme.

Apparatus and methods for converting analog signal to N-bit digital data

A method and apparatus for reproducing a video using a watermark inserting function. The method of inserting a watermark into a video being reproduced, using an on-screen-display (OSD) data mixer included in a video reproduction apparatus, includes determining a watermark pattern indicating information on reproduction of the original video. The watermark pattern is converted into watermark data capable of being recognized by an OSD data mixer and synthesized with the video being reproduced, using the OSD data mixer.

Method and apparatus for reproducing video using watermark inserting function

Provided are methods of generating and verifying an electronic signature of software data, wherein software data is split into a plurality of blocks, electronic signatures corresponding to each of the blocks are generated, and some of the electronic signatures are randomly selected for verification. Accordingly, a time required for verifying an electronic signature can be reduced while maintaining the advantages of an electronic signature system.

Method and apparatus for generating and verifying electronic signature of software data, and computer readable recording medium thereof

A method of and apparatus for installing software for using digital content and are provided. The method of installing software for using digital content includes: transmitting a request for the software; transmitting security information indicating a security status of a device in which the software is to be installed; and receiving the software from an external apparatus that received the request and security information. According to the method and apparatus, the software can be dynamically securely installed, thereby allowing a variety of digital contents to be used and enhancing the utilization of the device.

Method of installing software for using digital content and apparatus for playing digital content

Provided is a method of protecting a content consumer's privacy. The method includes classifying contents into content groups, encrypting the contents using different encryption keys, generating a plurality of decryption keys each of which can decrypt all contents in each of the content groups, and provides the generated decryption keys to authorized clients, wherein each client is provided with a different decryption key.

Method and apparatus for protecting content consumer's privacy

A method of checking revocation of a device and software, and transmitting data to a secure device and secure software whose keys have not been leaked is provided. The method includes receiving authentication information of a device requesting transmission of data, and authentication information of software accessing the data in the device; checking revocation of the device and the software, based on the received authentication information; and transmitting the data to the software of the device, when the device and the software are not revoked as a result of the checking. By doing so, during transmission of data, such as content or a license, it is possible to check security of a device and software being executed in the device, so that the data can be more safely transmitted.

Method, system, and data server for checking revocation of content device and transmitting data

A random signal generator includes a differential noise generation circuit, an amplification circuit and a single-ended amplifier. The differential noise generation circuit includes a pair of input nodes and a pair of output nodes, and is configured to receive noise signals at the pair of input nodes and to generate differential noise signals at the pair of output nodes. The differential noise generation circuit is self-biased such that the pair of input nodes is coupled to the pair of output nodes. The amplification circuit is configured to amplify the differential noise signals output from the differential noise generation circuit to generate amplified differential signals. The single-ended amplifier is configured to generate a random signal based on the amplified differential signals, the random signal having irregular transition time points.

Random signal generator and random number generator including the same

A method of transporting an encrypted stream of multimedia content is provided. In the method, when a packet contains data of a predetermined length including selected data from pieces of data corresponding to the multimedia content and a header, key information, and first time information from among pieces of information included in a selected packet from among at least one packet are received, and encryption information is determined from the key information and the first time information, according to a key derivation function. The first time information is variable with time. The at least one packet including data corresponding to the multimedia content is encrypted using the encryption information. The at least one encrypted packet and the key information are transported.

Method and apparatus for encrypting transport stream of multimedia content, and method and apparatus for decrypting transport stream of multimedia content

Provided are a method of tracing a device key in a user key management system using a hierarchical hash chain broadcast encryption scheme (HBES) algorithm, a user key management system for executing the method of tracing a device key, and a computer program for executing the method of tracing a device key. The method of tracing a device key of an illegal decoder in a user key management system for broadcast encryption includes: tracing a device key using a binary search; and revoking the traced device key. The technology according to the present invention can be applied to prevent exposure of the device keys to hacking. The present invention provides a method of tracing which can be applied to an HBES algorithm structure.

Method of tracing device keys for broadcast encryption

Provided is a method of inserting authentication code into a data packet. The method includes determining whether to insert authentication code into a data packet based on at least one of an importance of the data packet and a type of the data packet, and inserting the authentication code into the data packet based on a result of the determining.

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Seoul, South Korea

Choong-Hoon Lee