---
# System prepended metadata

title: Cyber Security
tags: [OSC, Cyber-Security]

---

# Cyber Security
###### tags: `Cyber-Security`, `OSC`

:::success
### Table of Content

[TOC]

:::

## Risk

### 竊聽 (eavesdrop)

![](https://i.imgur.com/BqlMLLC.png)

- 定義
  
  #### X偷取由A傳送給B之訊息,,則定義為 ***竊聽 (eavesdrop)***
  
- 解決方法

  #### ***加密(encryption)***

### 電子欺騙 (spoofing)

![](https://i.imgur.com/YVPYyeH.png)

- 定義
  
  #### X透過傳送假數據,偽裝為A向B獲取訊息,則定義為***電子欺騙 (spoofing)***
  
- 解決方法

  #### ***訊息識別碼(message authentication code)***
  #### ***數位簽章(digital signature)***
  #### ***數位憑證(digital certificate)***

### 竄改 (falsification)

- 定義

  #### X改動由A傳送給B之訊息,則定義為***竄改 (falsification)***
  
- 解決方法

  #### ***訊息識別碼(message authentication code)***
  #### ***數位簽章(digital signature)***
  #### ***數位憑證(digital certificate)***

### 抵賴 (repudiation)

- 定義

  #### 當B預定收到A之訊息，然A最後主張沒有一回事,則定義為***抵賴 (repudiation)***
  
- 解決方法

  #### ***數位簽章(digital signature)***
  #### ***數位憑證(digital certificate)***