• Journal of the Korea Institute of Information Security & Cryptology
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• v.17 no.2
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• pp.115-123
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• 2007

In cryptographic devices like a smart-card whose computing ability and memory are limited, cryptographic algorithms should be performed efficiently. Scalar multiplication is very important operation in Elliptic Curve Cryptosystems, and so must be constructed in safety against side channel attack(SCA). But several countermeasures proposed against SCA are exposed weaknesses by new un-dreamed analysis. 'Double-and-add always scalar multiplication' algorithm adding dummy operation being known to secure against SPA is exposed weakness by Doubling Attack. But Doubling Attack cannot apply to sABS receding proposed by Hedabou, that is another countermeasure against SPA. Our paper proposes new strengthened Doubling Attacks that can break sABS receding SPA-countermeasure and a detailed method of our attacks through experimental result.

• The Journal of the Korea Contents Association
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• v.16 no.8
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• pp.257-267
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• 2016

The research subject is 8 mothers who put their physical/mentally impaired children in a group home, as the research method, this study conducted an in-depth interview survey. The participants of this study collected data from the in-depth interview on 8 mothers who put their disabled children to the group home. In the result of open coding, total 34 concepts, 28 subcategories and 13 categories were derived. The core category in the selective coding was 'establishing restorative relationship through entering a group home after encountering the limit of nurture.' Practical Strategies include the following; first, it's necessary to provide psychology counselling consequent on a mother's nurturing phase, and this study proposes a program for a father having a child with disability; in addition, there is the necessity of having to arrange the differentiated facility for physically/mentally impaired people, which meets the needs of the relevant people. At a level of policy, this study suggested the necessity of having to take into account the minimization of poverty problem facing a family having a disable child through the caring card, necessity of the use of good-natured card, and medical-social-welfare-based intervention, expansion of facility-touring class installation, and use of adult guardianship system, and differential payment of disabled child nurturing allowance consequent on income quantile, etc.

• 한국체육학회지인문사회과학편
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• v.54 no.1
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• pp.597-609
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• 2015

The purpose of this research is to analyze requirements for sports for all of the intellectually handicapped and their characteristics. Subjects for this study consisted of 33 undergraduate students who belonged to the department of physical education in P University. The Q-population a total of 28 people were selected including 16 handicapped college students from P welfare center and 12 members from the vocational adjustment class. The card used in Q sort was 27 categories of sports for all suggested by the korea Paralympic Committee. The result of Q-sorting were coded and analysed using QUANL pc program. According to the research result, Firstly, the requirement types of sports for all of the intellectually handicapped revealed to be four types(The eigen values of the five types of attitudes are 5.6, 2.3, 1.9, and 1.7): Secondly, the characteristics for each five types were determined to be experiential-value Pursuing type(type 1), interest-value pursuing type(type 2), purpose0orientation pursign type(type 3) and Safety-oriented pursuing type(type 4). Through the characteristics of each of the five types. Such results of the research suggest that the demand of the mentally ills for sports for all can be diverse and there can be a variety of types based on the background factors.