摘要： 有效防止不良实体访问本地资源是信任管理中的研究重点。目前主流的凭证链发现算法均未考虑实体间的信任程度，该文给出基于信任度的改进凭证链发现算法，通过信任度阈值从另一个角度对不良实体的请求进行屏蔽。例证结果显示，该算法对不诚信实体的访问进行了有效的抑制，符合开放式环境中实体之间信任关系的主观性、模糊性，使系统的安全性有很大提高。

关键词: 信任管理, 凭证链, 信任度

Abstract: Effectively preventing dishonest entities access to local resources is always one of the main issues in trust management. Most existing training credential chain discovery methods ignor the trust level between two entities. This paper proposes a modified credential chain discovery algorithm based on trust worthiness. This algorithm uses threshold of trust worthiness from another sidee to shield dishonest user. Experimental results show that modified algorithm takes more consideration for dishonest user, which conforms to the fuzziness of trust relationship between entities in open environment, and also strengthens the system’s security.

Key words: trust management, credential chain, trust worthiness

中图分类号: 

• TP338.6