信任的理解
信任是一種信仰，是一種主觀的mental 態(tài)度，對一個人或物的行為和動作（action 和 behavior）和相關(guān)result（agent A to another agent B）
信任的特點
主觀性 Subjective，完全取決去個人的disposition 和 經(jīng)歷。
Optimistic person, is easy to trust, and difficult to distrust
Pessimistic person, is hard to trust, and easy to distruct
轉(zhuǎn)遞性 Transitivity
A相信B，B相信C，就是A相信C
Context dependent and multi-faceted
Context dependent, different situation the trust for something is different.
Dynamics
信任會隨著時間的推移，增加或是減少
Trust Acquisition 獲取信任
信任可以從個人經(jīng)歷獲得， could gain trust from personal experiences
- 直接互動 Direct interaction
- 觀察 Observation
- 推算 Presumptions
信任可以從他人獲得
- Word from others (流言蜚語，八卦，口口相傳)
- institutions （機構(gòu)）
聲譽
是一群人對于agent的信任或是評價
Centralized person/agent reputation systems
特點是比較簡單
reputation 來自于不同用戶的總體評級
有centralized system manager, to keep of trust and reputation
Decentralized person/agent reputation systems
沒有centralized system manager, to keep of trust and reputation
reputation需要通過自己來建立， Each agent has to develop the reputation on other agents based on direct interactions.
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