Physical security measures , locks make it more difficult to remove equipment , electronic locks record who enters/leaves a room, keys can be lost / copied / stolen / used by someone else, swipe cards can be lost / copied / given to someone to use , locks can be expensive to install , pcs can be fastened to a desk using cable locks, computers / equipment can be located in locked rooms, PINS to locked rooms can be shared / shoulder surfed , Passwords , need to be strong and not easily guessed, should be made up of a combination of capital letters, lowercase letters, numbers and symbols/characters , simple and cost effective method of preventing unauthorised access , strong passwords cab be difficult to remember , need to be changed often to retain security , do not protect from social engineering attacks e.g. can be tricked into revealing this , specialist software can be used to crack these , Biometrics , voice recognition , facial recognition , iris recognition , fingerprint , no need to remember passwords/pins, no need to update , unique to individual , specialist software / equipment so expensive .

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