Abstract: An apparatus and method that prevent a bit error in a static random access memory (SRAM)-based Physically Unclonable function (PUF). The method for preventing an error in a PUF includes selecting any value, from a physically unclonable function based on a volatile memory device, as an input value, and checking a response corresponding to the selected input value, classifying cells having a plurality of bits corresponding to the response depending on frequency of error occurrence, calculating a number of white cells, in which an error does not occur, from classified results, and determining whether the number of white cells is greater than a preset threshold number of white cells, and selecting an input value of the physically unclonable function based on results of determination.

Abstract: An apparatus and method that prevent a bit error in a static random access memory (SRAM)-based Physically Unclonable function (PUF). The method for preventing an error in a PUF includes selecting any value, from a physically unclonable function based on a volatile memory device, as an input value, and checking a response corresponding to the selected input value, classifying cells having a plurality of bits corresponding to the response depending on frequency of error occurrence, calculating a number of white cells, in which an error does not occur, from classified results, and determining whether the number of white cells is greater than a preset threshold number of white cells, and selecting an input value of the physically unclonable function based on results of determination.

Abstract: A low-power encryption apparatus and method are provided. The low-power encryption apparatus includes a mask value generation unit, a mask value application unit, a round key application unit, a mask operation unit, a shift operation unit, and a shift operation correction unit. The mask value generation unit generates a mask value M having the same bit length as input round function values. The mask value application unit generates first masking round function values by applying the mask value M. The round key application unit generates second masking round function values by applying round key values. The mask operation unit generates third masking round function values by performing a mask addition operation. The shill operation unit generates fourth masking round function values by performing a circular shift operation. The shift operation correction unit generates output round function values by performing an operation using the mask value M.

Abstract: A secret key generation apparatus and method are provided. The secret key generation apparatus includes at least one antenna, amplification/phase controllers, a transceiver, and a random signal controller. The antenna receives a wireless signal from a counterpart terminal that performs wireless communication. The amplification/phase controllers control the amplification gain and phase of the wireless signal that is received via at least one antenna. The transceiver measures the status of a wireless channel using the wireless signal having the controlled amplification gain and phase, determines parameters based on results of the measurement, and generates a secret key based on results of the determination. The random signal controller controls the amplification/phase controllers so that the amplification gain and phase are adjusted whenever the transceiver generates a secret key.

Abstract: An apparatus and method for generating a group key using the status of a wireless channel are provided. The apparatus includes a representative channel response selection unit for selecting a representative channel response signal from among pilot signals received from slave terminals. A key generation unit generates a group key based on a representative channel response value of the representative channel response signal. A hash value generation unit generates a hash value corresponding to the group key. A transmission pilot control unit adjusts power intensities of transmission pilots of the respective slave terminals using the channel response value of the representative channel response signal and channel response values and transmission power intensities of the slave terminals. A communication unit is individually connected to the slave terminals and configured to transmit pilot signals, power intensities of which have been adjusted, and the hash value to the slave terminals.

Abstract: Provided are a wireless printing system and method based on wireless Local Area Network (LAN). A method of requesting a wireless printing, includes: requesting a printer that exists in a wireless LAN to perform a print job; and communicating with the printer according to a standard of the wireless LAN in order to transmit data regarding the print job to the printer. The method provides wireless direct printing suitable for a wireless LAN environment.

Abstract: A low-power encryption apparatus and method are provided. The low-power encryption apparatus includes a mask value generation unit, a mask value application unit, a round key application unit, a mask operation unit, a shift operation unit, and a shift operation correction unit. The mask value generation unit generates a mask value M having the same bit length as input round function values. The mask value application unit generates first masking round function values by applying the mask value M. The round key application unit generates second masking round function values by applying round key values. The mask operation unit generates third masking round function values by performing a mask addition operation. The shill operation unit generates fourth masking round function values by performing a circular shift operation. The shift operation correction unit generates output round function values by performing an operation using the mask value M.

Abstract: A wireless printing system and method based on IEEE 802.11 are provided. A method of requesting a print job, includes: scanning a printer that functions as an AP in a wireless LAN; obtaining an address of the printer from the scanned result; and requesting a predetermined print job by having the obtained address as a destination. The method enables to locate a printer that functions as an Access Point (AP) while stations associate with a Basic Service Set (BSS) in a wireless Local Area Network (LAN) based on IEEE 802.11.

Abstract: An apparatus and method for generating a group key using the status of a wireless channel are provided. The apparatus includes a representative channel response selection unit for selecting a representative channel response signal from among pilot signals received from slave terminals. A key generation unit generates a group key based on a representative channel response value of the representative channel response signal. A hash value generation unit generates a hash value corresponding to the group key. A transmission pilot control unit adjusts power intensities of transmission pilots of the respective slave terminals using the channel response value of the representative channel response signal and channel response values and transmission power intensities of the slave terminals. A communication unit is individually connected to the slave terminals and configured to transmit pilot signals, power intensities of which have been adjusted, and the hash value to the slave terminals.

Abstract: A secret key generation apparatus and method are provided. The secret key generation apparatus includes at least one antenna, amplification/phase controllers, a transceiver, and a random sign& controller. The antenna receives a wireless signal from a counterpart terminal that performs wireless communication. The amplification/phase controllers control the amplification gain and phase of the wireless signal that is received via at least one antenna. The transceiver measures the status of a wireless channel using the wireless signal having the controlled amplification gain and phase, determines parameters based on results of the measurement, and generates a secret key based on results of the determination. The random signal controller controls the amplification/phase controllers so that the amplification gain and phase are adjusted whenever the transceiver generates a secret key.

Abstract: Provided are a wireless printing system and method based on wireless Local Area Network (LAN). A method of requesting a wireless printing, includes: requesting a printer that exists in a wireless LAN to perform a print job; and communicating with the printer according to a standard of the wireless LAN in order to transmit data regarding the print job to the printer. The method provides wireless direct printing suitable for a wireless LAN environment.

Abstract: Provided are a wireless printing system and method based on wireless Local Area Network (LAN). A method of requesting a wireless printing, includes: requesting a printer that exists in a wireless LAN to perform a print job; and communicating with the printer according to a standard of the wireless LAN in order to transmit data regarding the print job to the printer. The method provides wireless direct printing suitable for a wireless LAN environment.

Abstract: A method of providing multimedia data for direct printing and a direct printing method and apparatus are provided. The method of providing multimedia data for direct printing includes composing hyperlink information on image data to be printed by an image supplying apparatus and text using a predetermined markup language, transferring the markup document resulting from the composing to a printing apparatus directly connected with the image supplying apparatus via a predetermined interface for performing a direct printing job, and transferring the image data to the printing apparatus in response to a request from the printing apparatus. When a direct printing job from a photographing apparatus to a printing apparatus is performed, multimedia data including text and an image can be printed.

Abstract: There are provided a system and a method for printing out image data and text data. The system for printing out image data and text data includes: a mobile device transmitting a document including link information on an image data file, file identification information for identifying the image data file, and text data, and then transmitting the image data file identified by the file identification information; and a printing-out device receiving the document, extracting the file identification information for identifying the image data file linked by the link information, receiving the image data file identified by the extracted file identification information, and printing out the received image data file and the text data.

Abstract: Provided are an apparatus and method for estimating a voice data value corresponding to a silent period produced in a key resynchronization process using the sine waveform characteristic of voice when encrypted digital voice data is transmitted in one-way wireless communication environment. The apparatus includes a transmitter that generates a key resynchronization frame containing key resynchronization information and vector information on voice data inserted thereinto and transmits the key resynchronization frame, and a receiver that receives the key resynchronization frame from the transmitter, extracts the vector information inserted in the key resynchronization frame, and estimates a voice data value corresponding to the key resynchronization period. Based on change ratio between slopes calculated using received voice data, it is possible to estimate the voice data corresponding to a silent period, which improves communication quality.

Abstract: A method of printing a captured image file using an ordering file includes: receiving selection information for selecting a file to be printed from among image files, multimedia files, or combinations of these files, and print control information for the selected file, input by a user; generating the ordering file using a markup language based on the input selection information and print control information; and transmitting the generated ordering file to a printing device through a predetermined interface. The printing method may further include: parsing the transmitted ordering file and printing the selected file in the printing device. Accordingly, an XML-based ordering file defining multiple pages of printing jobs for direct printing or batch printing can be generated and transmitted or transferred in a variety of ways, and in particular, multimedia files and style information as well as image files can be processed.

Abstract: Provided is a method of printing captured images, a recording medium storing a print ordering file of a captured image including multimedia data, and a method and apparatus for creating the print ordering file. The recording medium includes stored files and a markup language print ordering file created based on selection information selecting the file to be printed among the stored files and print control information on the file to be printed. The stored files include a captured image file, a hypertext file, or a combination thereof. The print ordering file uses an asset ID of the MPV format including a definition of a media asset, or an element or an attribute of an XML format. An image file and a hypertext file including multimedia data can be printed in a variety of forms without print control information restriction.

Abstract: Provided are methods and apparatuses for direct printing. The method includes transferring a markup document including link information on image data and text data to be printed via an image supplying apparatus, transferring information on image data stored by the image supplying apparatus according to a request from a printing apparatus to which the markup document is transferred, receiving the data identifier from the printing apparatus, which obtains the data identifier to identify the image data to be printed through the information on the received image data, and transferring image data identified by the received data identifier. When a direct printing job is performed between the image supplying apparatus and the printing apparatus, image data can be transferred and printed together with text data.

Abstract: There are provided a system and a method for printing out image data and text data. The system for printing out image data and text data includes: a mobile device transmitting a document including link information on an image data file, file identification information for identifying the image data file, and text data, and then transmitting the image data file identified by the file identification information; and a printing-out device receiving the document, extracting the file identification information for identifying the image data file linked by the link information, receiving the image data file identified by the extracted file identification information, and printing out the received image data file and the text data.

Abstract: Provided are a wireless printing system and method based on wireless Local Area Network (LAN). A method of requesting a wireless printing, includes: requesting a printer that exists in a wireless LAN to perform a print job; and communicating with the printer according to a standard of the wireless LAN in order to transmit data regarding the print job to the printer. The method provides wireless direct printing suitable for a wireless LAN environment.