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Midori64 proposed by Banik et al. in 2015 is an SPN-type block cipher with 128-bit secret key. The designers have evaluated the security of Midori64 against differential attack, linear attack, boomerang-type attack, impossible differential attacks, and meet-in-the-middle attack by themselves. In this paper, we discuss higher-order differential attack on Midori64, which has not been analyzed yet. Higher-order...
Midori64 proposed by Banik et al. in 2015 is an SPN-type block cipher with 128-bit secret key. The higher-order differential characteristics of the boolean polynomial of encryption function can be exploited for cryptanalysis. In this paper, we show a variety of the peculiar third-order differential characteristics of Midori64 block cipher, and theoretically analyze the characteristics.
An architecture level change of existing software requires tedious, error-prone and time-consuming tasks. However, current Integrated Development Environments (IDEs) do not support such high-level refactorings. In this paper, we present a scalable but simple composite refactoring for decoupling multiple classes. In addition, we introduce several primitive refactorings as components of the composite...
We propose a distributed transmission power control method based on soft fractional frequency reuse (SFR) for cellular downlink orthogonal frequency division multiple access (OFDMA). The proposed method adaptively controls the transmission power density in the protected and non-protected bands of SFR depending on the user distribution within a cell in order to maximize the geometric mean of the user...
We proposed a compact color descriptor specialized in expressing clothing for person re-identification across cameras. It expresses any type of clothing colors by combination of a set of unicolor clothing selected from a collection of various colored clothing widely and densely spread over clothing color space; which is called a wardrobe. Proper wardrobe can be collected through a clothing manufacture...
We have developed presence sensor-sheets using near-field radio-frequency identification (RFID) systems to detect objects and persons with no RFID tags attached. The sheet is composed of ordinary passive RFID tags and a near-field traveling-wave antenna as a reader antenna. The tags operate as proximity sensors utilizing the dependencies of tag antenna operations on their surroundings. Prototyping...
In this paper, we propose an independent and adaptive link rate control for a 1Gbps/10Gbps hybrid PON, where the low power consumption 1Gbps transceivers are maximally used even when incoming traffic reaches the given threshold. We show effectiveness of our proposed method in terms of energy efficiency through simulation experiments.
In this paper, we propose a method of image orientation detection based on camera-subject distances. This method is characterized as an adaptive control of probabilistic decision by subject distances. The control is operated by switching of conditional probabilities of visual features at each subject distance category. The subject distance can be extracted from Exif. Evaluation and comparison is performed...
In recent years, high speed, high-capacity and reliable wireless communications are very demanding. To achieve those requests, it is necessary to solve both time and frequency selective fadings caused by multi-path propagation on wireless channels. Up to now, OFDM as a frequency domain equalization scheme has been mainly considered for the frequency selective fading, but OFDM suffers from its long...
In this paper, we propose a new approach to sky region detection. It enables robust detection for cloudy sky regions by evaluating similarity of visual features between combinations of segmented regions in an input image and sky region components stored in a database. To reduce the matching cost for the detection, the proposed approach adopts a combination search. It eliminates non-sky regions from...
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