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Week 10 - Coggle Diagram

- - - - apps comes with vulnerabilities so exploit them by simply resetting the password
  - - - bio info; name, dob, keywords
    - - use some strategy to help them remember the password
      - reuse passwords. parts of passwords
  - - - Hash Functions
        
        H(string)=target hash value
      - key space
        
        number of all possible symbols to the power of n where n is the length of the password
      - average time to crack a password
        
        key space/ number of attempts per day
      - attempts per day
        
        10^10
    - - harness idle computers and use them against the encrypted file folder or drive
      - spread computational burden among multiple computers
    - - leverages computing power of the devices
      - cost effectiveness
      - good for large scaled library attacks
  - - - simple phrases put together to form a password
      - includes words, special characters, numbers
      - modified using leetspeak
    - - takes a word and changing some signs of it
      - can be a characteristic of any password, not just passphrases
    - - word in word
        
        password made up of 2 words, where one is inserted into the other
      - self explanatory
    - - Biographical
      - System
      - Neutral
        
        part of a bigger one
        
        bigger one includes biogarphical + system
    - - Re-use model
        
        use previous passwords to increase chance of cracking
      - tendency to reuse same passwords across multiple accounts
      - dictonary attack can be developed based
    - - upper or lower case
    - - {0,...9}
    - - more complex patterns doing a zigzag pattern from right to left
- - - - used to overwrite data on a hard drive in way that makes them uncrecoverable
      - Secure erase- Apple OSX lion
      - intended to keep personal/ corporate info private
      - can wipe specific files
    - - defragmentation is the process of moving clusters as close together as possible
      - happens in 3 ways
        
        manually initiated
        
        done automatically by OS
        
        user scheduled
      - done to improve computer performance
      - How do we find if a drive has been defragmented
        
        ask a suspect
        
        boot drive image + look at amount of file fragmentation
        
        sig amount of fragmentation= drives in regular use
      - can overwrite data that has forensic value
    - - Bits of the drive: distinct repeating pattern of data may be seen
      - presence of such apps require questoning of suspect why it was installed
  - - - is used because they have redundant data; noise
      - can be
        
        iamge
        
        video
        
        audio
        
        word processing doc
    - - is the embedded secret document