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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The KIPS Transactions:PartC
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Journal DOI :
Korea Information Processing Society
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Volume & Issues
Volume 18C, Issue 6 - Dec 2011
Volume 18C, Issue 5 - Oct 2011
Volume 18C, Issue 4 - Aug 2011
Volume 18C, Issue 3 - Jun 2011
Volume 18C, Issue 2 - Apr 2011
Volume 18C, Issue 1 - Feb 2011
Selecting the target year
Modular Exponentiation by m-Numeral System
Lee, Sang-Un ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 1~6
DOI : 10.3745/KIPSTC.2011.18C.1.001
The performance and practicality of cryptosystem for encryption, decryption, and primality test is primarily determined by the implementation efficiency of the modular exponentiation of
(mod n). To compute
(mod n), the standard binary squaring still seems to be the best choice. But, the d-ary, (d=2,3,4,5,6) method is more efficient in large b bits. This paper suggests m-numeral system modular exponentiation. This method can be apply to
. And, also suggests the another method that is exit the algorithm in the case of the result is 1 or a.
A Constant Pitch Based Time Alignment for Power Analysis with Random Clock Power Trace
Park, Young-Goo ; Lee, Hoon-Jae ; Moon, Sang-Jae ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 7~14
DOI : 10.3745/KIPSTC.2011.18C.1.007
Power analysis attack on low-power consumed security devices such as smart cards is very powerful, but it is required that the correlation between the measured power signal and the mid-term estimated signal should be consistent in a time instant while running encryption algorithm. The power signals measured from the security device applying the random clock do not match the timing point of analysis, therefore random clock is used as counter measures against power analysis attacks. This paper propose a new constant pitch based time alignment for power analysis with random clock power trace. The proposed method neutralize the effects of random clock used to counter measure by aligning the irregular power signals with the time location and size using the constant pitch. Finally, we apply the proposed one to AES algorithm within randomly clocked environments to evaluate our method.
A Time Synchronization Method of Sensor Network using Single Flooding Algorithm
Shin, Jae-Hyuck ; Kim, Young-Sin ; Jeon, Joong-Nam ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 15~22
DOI : 10.3745/KIPSTC.2011.18C.1.015
Usually time synchronization is performed after routing tree is constructed. This thesis proposes a time synchronization algorithm combined with single-flooding routing tree construction algorithm in a single path. TSRA (Time Synchronization Routing Algorithm) uses routing packets to construct a routing tree. Two types of time information are added to the routing packet: one is the packet receiving time, and the other is the packet sending time. Time offset and transmission time-delay between parent node and child node could be retrieved from the added time information using LTS (Lightweight Time Synchronization) algorithm. Then parent node sends the time offset and transmission time to children nodes and children nodes can synchronize their time to the parent node time along the routing tree. The performance of proposed algorithm is compared to the TPSN (Timing-sync Protocol for Sensor Networks) which is known to have high accuracy using NS2 simulation tool. The simulation result shows that the accuracy of time synchronization is comparable to TPSN, the synchronization time of all sensor nodes is faster than TPSN, and the energy consumption is less than TPSN.
Implementation and Verification of User Centric Constant Measurement for Pre-management of IPTV Service Quality
Kim, Beom-Joon ; Kim, Chin-Chol ; Park, Jae-Sung ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 23~30
DOI : 10.3745/KIPSTC.2011.18C.1.023
Recently internet protocol television (IPTV) service is becoming a typical emerging service enabled on broadband networks. Through the Internet which cannot support quality of service (QoS) beyond best-effort (BE) policy, how to manage and maintain its service quality is an important and essential issue for successful deployment and settlement of IPTV service. In particular, the current measurement scheme that mostly depends on specific equipments should be replaced with one that supports realtime and constant measurement achieved on a user's own will. Therefore, this paper proposes a scheme so-called 'user centric realtime measurement' of IPTV service. The developed software, which is installed in a set-top box (STB) at a user's premise, measures and reports the quality of IPTV service in realtime. In order to verify the performance and accuracy of the developed software, a number of tests are performed comparing to the measurement values from two major measurement equipments. The result of the tests shows that the measurement by the implemented software is significantly reliable.
A Study on Traffic Volume Prediction for e-Commerce Systems
Kim, Jeong-Su ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 31~44
DOI : 10.3745/KIPSTC.2011.18C.1.031
The applicability of network-based computing depends on the availability of the underlying network bandwidth. Such a growing gap between the capacity of the backbone network and the end users' needs results in a serious bottleneck of the access network in between. As a result, ISP incurs disadvantages in their business. If this situation is known to ISP in advance, or if ISP is able to predict traffic volume end-to-end link high-load zone, ISP and end users would be able to decrease the gap for ISP service quality. In this paper, simulation tools, such as ACE, ADM, and Flow Analysis, were used to be able to perceive traffic volume prediction and end-to-end link high-load zone. In using these simulation tools, we were able to estimate sequential transaction in real-network for e-Commerce. We also imported virtual network environment estimated network data, and create background traffic. In a virtual network environment like this, we were able to find out simulation results for traffic volume prediction and end-to-end link high-load zone according to the increase in the number of users based on virtual network environment.
Throughput Analysis in Vehicular Wi-Fi Networks
Kim, Won-Jung ; Kim, Young-Hyun ; Youn, Joo-Sang ; Pack, Sang-Heon ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 45~50
DOI : 10.3745/KIPSTC.2011.18C.1.045
Due to advances in wireless communications and portable terminals, any-time, any-where, and any-device Internet access is possible. In particular, Internet access in moving vehicles is an emerging and challenging issue. Even though a variety studies have been conduced for vehicular networks, little attention is paid to vehicular Wi-Fi networks where a Wi-Fi access point (AP) is installed at the vehicle and the AP is connected to an external base station (BS). In this paper, we conduct a measurement study on the uplink and downlink throughput for Internet access in vehicular Wi-Fi networks. We consider diverse network environments: high-speed train, car, and subway. Measurement results demonstrate that current Internet access in vehicular Wi-Fi networks are not satisfactory for interactive multimedia applications. Therefore, in-depth study on resource management in vehicular Wi-Fi networks is strongly required.
A P2P Overlay System based on P4P-framework for Live Multimedia Streaming Services
Byun, Hae-Sun ; Lee, Mee-Jeong ;
The KIPS Transactions:PartC, volume 18C, issue 1, 2011, Pages 51~60
DOI : 10.3745/KIPSTC.2011.18C.1.051
In this paper, we propose a P4P based P2P system for live multimedia streaming services. In order to satisfy the strict requirement of delay in live multimedia streaming, in the proposed scheme, the P4P server of network provider provides the network status information related to delay and congestion links to P2P system in addition to the information to optimize the network resource utilization. The P2P system server, then, makes the peering suggestion based on the information from the network server. Also, we propose a playback synchronization mechanism that enable each peer to start the playback within the limited variation from the playback positions of source peer. Through the simulation results, it is shown that the proposed scheme not only deals with the original objective of the P4P framework, i.e., effective network utilization, but also the live multimedia streaming requirements. It enhances the playback continuity, and reduces the playback start-up latency and the control overhead. In addition, the proposed scheme reduces the variation in playback positions of the peers.