Linux stores the random data collected from the physical resources into a random pool, and then uses two devices to turn the randomness into pseudo random numbers. These two devices are/dev/random and /dev/urandom. They have different behaviors. The /dev/random device is a blocking device. Namely, every time a random number is given out by this device, the entropy of the randomness pool will be decreased. When the entropy reaches zero, /dev/random will block, until it gains enough randomness Let us design an experiment to observe the behavior of the /dev/random device. We will use the cat command to keep reading pseudo random numbers from /dev/random. We pipe the output to hexdump for nice printing. cat /dev/random | hexdump SEED Labs - Pseudo Random Number Generation Lab 4 Please run the above command and at the same time use the watch command to monitor the entropy What happens if you do not move your mouse or type anything. Then, randomly move your mouse and see whether you can observe any difference. Please describe and explain your observations. Question If a server uses /dev/random to generate the random session key with a client. Please describe how you can launch a Denial-Of-Service (DOS) attack on such a server. Linux stores the random data collected from the physical resources into a random pool, and then uses two devices to turn the randomness into pseudo random numbers. These two devices are/dev/random and /dev/urandom. They have different behaviors. The /dev/random device is a blocking device. Namely, every time a random number is given out by this device, the entropy of the randomness pool will be decreased. When the entropy reaches zero, /dev/random will block, until it gains enough randomness Let us design an experiment to observe the behavior of the /dev/random device. We will use the cat command to keep reading pseudo random numbers from /dev/random. We pipe the output to hexdump for nice printing. cat /dev/random | hexdump SEED Labs - Pseudo Random Number Generation Lab 4 Please run the above command and at the same time use the watch command to monitor the entropy What happens if you do not move your mouse or type anything. Then, randomly move your mouse and see whether you can observe any difference. Please describe and explain your observations. Question If a server uses /dev/random to generate the random session key with a client. Please describe how you can launch a Denial-Of-Service (DOS) attack on such a server