• KIPS Transactions on Computer and Communication Systems
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• v.12 no.6
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• pp.181-188
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• 2023

Block cipher is not expected to be safe for quantum computer, as Grover's algorithm reduces the security strength by accelerating brute-force attacks on symmetric key ciphers. So it is necessary to check the post-quantum security strength by implementing quantum circuit for the target cipher. In this paper, we propose the optimal quantum circuit implementation result designed as a technique to minimize the use of quantum resources (qubits, quantum gates) for SIMECK lightweight cryptography, and explain the operation of each quantum circuit. The implemented SIMECK quantum circuit is used to check the estimation result of quantum resources and calculate the Grover attack cost. Finally, the post-quantum strength of SIMECK lightweight cryptography is evaluated. As a result of post-quantum security strength evaluation, all SIMECK family cipher failed to reach NIST security strength. Therefore, it is expected that the safety of SIMECK cipher is unclear when large-scale quantum computers appear. About this, it is judged that it would be appropriate to increase the block size, the number of rounds, and the key length to increase the security strength.

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.123.1-123
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• 2001

• 한국도로학회:학술대회논문집
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• 2010.09a
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• pp.469-476
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• 2010

• Proceedings of the KWS Conference
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• 2003.11a
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• pp.259-261
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• 2003

• 한국도로학회:학술대회논문집
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• 2005.11a
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• pp.345-348
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• 2005

• Explosives and Blasting
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• v.17 no.4
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• pp.51-66
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• 1999

• Proceedings of the Korean Nuclear Society Conference
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• 2001.10a
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• pp.271.1-271
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• 2001

• The Journal of the Acoustical Society of Korea
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• v.42 no.6
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• pp.565-571
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• 2023

With the introduction of the post-verification system, the measurement of floor impact noise performance on-site has become mandatory, and the evaluation method has changed. To track the performance changes since the policy implementation, research is needed on how the characteristics of heavyweight impact sound change according to the varied evaluation method. In this study, we analyzed the contribution rate of the frequency band-specific sound pressure level on the single-number quantity for a multi-family housing unit with the same floor plan and floor structure, comprising 59 households, based on the changed impact sources and evaluation indicators. It is difficult to compare simply because the method of calculating contributions by frequency band according to the single-day evaluation is different, but the average contribution rate of 63 Hz was 80.8 % in the evaluation method before the introduction of the post-confirmation system (Tire measurement and evaluated as L'_i,Fmax,AW), and the average contribution rate of 125 Hz was 19.2 %. The current evaluation method (rubber ball measurement and evaluation as L'_iA,Fmax) shows that the contribution rate has decreased to 33.1 % on average at 50 Hz ~ 80 Hz, 58.7 % on average at 100 Hz ~ 160 Hz, 6.9 % on average at 200 Hz ~ 315 Hz, and 1.3 % on average at 400 Hz ~ 630 Hz. This result is a case analysis for the target apartment house, and it is necessary to analyze measurement data for more diverse apartment houses.

• The Journal of the Convergence on Culture Technology
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• v.10 no.5
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• pp.681-686
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• 2024

Korea Post service provides public services to the public, including mail, deposits, and insurance. The work of the postal activities is labor-intensive and physically intensive. Postal workers are exposed to the risk of injury and musculoskeletal disorders, and delivery workers are exposed to the risk of traffic accidents. The Postal Service Headquarters has strengthened safety and health activities to improve hazardous risk factors in the field. In addition, we are promoting activities to spread safety culture continuously. However, it is difficult to determine whether these activities were applied well to the site of the affiliated institution, and it is not known whether they were effective in preventing safety accidents. In addition, there is no objective evaluation system, so the current level of safety and health and problems related to workplace safety and health cannot be identified. Therefore, in this study, we tried to prepare basic data to propose an evaluation system, standard, and evaluation index suitable for the postal business so that the safety level of the public postal business can be evaluated efficiently and objectively. In other words, it was intended to analyze the characteristics of the public postal business and prepare the basis for the development of evaluation indicators considering it, and through this, an effective level evaluation can be performed and problems in safety and health management by institution can be identified.

• The Journal of Society for e-Business Studies
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• v.9 no.2
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• pp.33-50
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• 2004

This paper presents the evaluation model which is included in a quantitative evaluation methodology for evaluation processes of validity and effectiveness of information budget investment and improving conformance of ROI(Return On Investment). That is, the right efficiency targets of information investment for the development project to GDOC (Government electronic Document Distribution Center), and KPls(Key Performance Indexes) which enable to evaluate objectively effectiveness in the preliminary and post evaluation phases are developed, and then the results were come out by practical investigation study using quantitative evaluation methodology.