| 翻訳と辞書 |
| Computational trust ： ウィキペディア英語版 |
Computational trust
In information security, computational trust is the generation of trusted authorities or user trust through cryptography. In centralised systems, security is typically based on the authenticated identity of external parties. Rigid authentication mechanisms, such as Public Key Infrastructures (PKIs) or Kerberos have allowed this model to be extended to distributed systems within a few closely collaborating domains or within a single administrative domain. During recent years, computer science has moved from centralised systems to distributed computing. This evolution has several implications for security models, policies and mechanisms needed to protect users’ information and resources in an increasingly interconnected computing infrastructure.
Identity-based security mechanisms cannot authorise an operation without authenticating the claiming entity. This means that no interaction can occur unless both parties are known by their authentication frameworks. Spontaneous interactions would, therefore, require a single, or a few trusted certificate authorities (CAs). In the present context, PKI has not been considered since they have issues, thus it is unlikely that they will establish themselves as a reference standard in the near future. A user who wishes to collaborate with another party can choose between enabling security and thereby disabling spontaneous collaboration, or disabling security and enabling spontaneous collaboration. It is fundamental that mobile users and devices can authenticate in an autonomous way without relying on a common authentication infrastructure. In order to face this problem, we need to examine the challenges introduced by "global computing", a term coined by the EU for the future of the global information society, and to identify their impact on security.
==History==
Computational Trust applies the human notion of trust to the digital world, that is seen as malicious rather than cooperative. The expected benefits, according to Marsh et al., result in the use of others' ability through delegation, and in increased cooperation in an open and less protected environment. Research in the area of computational mechanisms for trust and reputation in virtual societies is directed towards increased reliability and performance of digital communities.
A trust-based decision in a specific domain is a multi-stage process. The first step of this process consists in identifying and selecting the proper input data, that is, the trust evidence. In general, these are domain-specific and are derived from an analysis conducted over the application involved. In the next step, a trust computation is performed on the evidence to produce trust values, that means the estimation of the trustworthiness of entities in that particular domain. The selection of evidence and the subsequent trust computation are informed by a notion of trust defined in the trust model. Finally, the trust decision is taken by considering the computed values and exogenous factors, like disposition or risk assessments.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Computational trust」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|