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good and bad hacker, terminlogy, threat and vulnerability, security…

- - - - authentication and privilege
        
        session replay
        
        principle of least privilege
      - communication protocol design
        
        sniffing, man-in-the-middle
        
        session killing, hijacking
      - parallelism and resource
        
        race condition
      - denial of service
  - - - buffer overflow
        
        static: stack-based buffer overflow
        
        dynamic: heap-based buffer overflow
      - input validation
        
        URL encoding
        
        document root escape
        
        SQL injection
      - back doors
  - - - denial of service (DOS)
        
        network DOS
        
        distributed DOS, zombies
      - administration problem
        
        weak password
        
        password cracking
        
        unsafe default