• Journal of Distribution Research
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• v.2 no.1
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• pp.197-213
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• 1997

It is becoming very difficult for a single company to perform every process and activity required to bring its product or service to market in a competitive manner. Consequently, we are observing a dramatic paradigm shift, with companies moving from performing all activities in-house to selective outsourcing for non-core elements of their business. Through outsourcing, companies can focus on their core competencies, reduce costs, improve quality and increase flexibility. Companies today can no longer afford to ignore the potential opportunities realized through mutually beneficial outsourcing relationships with third-party suppliers. The outsourcing opportunities exist in almost every business process. Many successful companies have implemented effective outsourcing relationships with third party suppliers to gain competitive advantage in a wide range of areas. However, in terms of logistics, it is not so easy to find those companies in our country. Consequently, this paper reviews previous researches and describes several topics in third party logistics such as advantages and disadvantages, how can we select third party suppliers, and so on.

• Journal of the Korean Society for information Management
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• v.24 no.3
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• pp.21-41
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• 2007

IT outsourcing has become a critical component of organizations, but improper expectations, ambiguous contracts and unclear goals frequently cause the failure of IT outsourcing. Especially we have to be concerned about the uncareful management of customer-supplier relationships based on a psychological contract perspective. This study focuses on the obligations of contractual parties for IT outsourcing which influence the outsourcing relationship(OR) and the successful performance of IT outsourcing(OP). The supplier obligations consist of the achievable infrastructure(S1) and capability(S2), and the customer obligations is composed of the acceptable environment(C1) and acceptability(C2) for IT outsourcing. This paper shows that the S1, S2, and C2 have an effect on the OR, the OR on the OP, and the S2 also on the OP directly. The four components of customer-supplier obligations are mutually related to each other. What is more, we must notice that the S2 has strong connections with the C2.

• Journal of Broadcast Engineering
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• v.18 no.5
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• pp.758-770
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• 2013

In a Broadcast Encryption System, a sender sends an encrypted message to a large set of receivers at once over an insecure channel and it enables only users in a target set to decrypt the message with their private keys. In 2005, Boneh et al. proposed a fully collusion-resistant public key broadcast encryption in which the ciphertext and the privatekey sizes are constant. In general, pairing-based broadcast encryption system is efficient in bandwidth and storing aspects than non-pairing based broadcast encryption system, however, it requires many computational costs that resource-constrained devices is not suit to be applied. In this paper, we propose a Broadcast Encryption scheme(called BEWD) that user can decrypt a ciphertext more efficiently. The scheme is based on Boneh et al.scheme. More precisely, it reduces receiver's computational costs by delegating pairing computation to a proxy server which computation is required to receiver in Boneh et al.scheme. Furthermore, the scheme enables a user to check if the proxy server compute correctly. We show that our scheme is secure against selective IND-RCCA adversaries under l-BDHE assumption.